[Tutor] endless loop
hi I am trying problem 6 in projecteuler.org. What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20? def rr(z,m=1): q=lambda n:m%n==0 s=lambda False : 0 a=filter(s,map(q,range(1,z))) if not a: m+=1 rr(z,m) else:return m This code is going into endless loop. rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) File "", line 7, in rr rr(z,m) I tried dime a dozen permutations oF the code. Can some one show me why it is going into Endless loop? Thank you Prasad ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Doubts galore.
> Never NEVER compare for equality with None. > > What you want is: > if doc is None and data is None: > > Also, what is "sys.agv1"? Did you mean sys.argv[1]? yes > >elif doc: > > data=open(doc,'r').read() > > data_c= binascii.hexlify(data) > >else:data_c= binascii.hexlify(data) > >if doc: > > q=tempfile.TemporaryFile() > > q.write(data_c) > > os.rename(q,doc) > > return > >return data_c > It would probably be cleaner to use one-line > conditional statements (sparingly) where they make > sense on their own, but not to mix multi-line and > single line styles in the same if-else structure. I am a newbie.I couldn't understand that comment. > I'm not sure the logical flow through there > does what you think it does, though. > > cript(doc='./language.txt') > > Traceback (most recent call last): > > File "", line 1, in > > File "", line 10, in cript > > TypeError: coercing to Unicode: need string or buffer, file found > Is this the actual code or did you retype it? I just copied from .py file and pasted. > It has some typos which makes me wonder. If you copy/paste > the actual code that can remove any confusion introduced > by simple typing mistakes, so we are sure we're all looking > at the same thing here. > > > > 1)Why I got the above error message with the above function?How to > correct it? > > > The binascii.hexlify() function converts a binary data string into > hexadecimal digits. You didn't give it a data string to work from, > you gave it an open file object. You'll need to actually read the > data from the file and give that to the function. > > > > 2)Is it reasonable to have 2 if blocks in a function as above? > > > Sure > > > > 3)Dose the tempfile create a fileobject on harddisk or in memory(Dose it > save my > > file as I expect it to do) > > > It creates a TEMPORARY file. That means you can expect it to > exist on disk until you close it, and then if at all possible, > it will automatically be destroyed for you. Hence "temporary". > Depending on your platform, while there will be a physical disk > file, it might not even show up in a directory or be openable by > other applications. > > If you want a file to not be temporary, use open() to create it. > Steve Willoughby| Using billion-dollar satellites > st...@alchemy.com | to hunt for Tupperware. Thanks for the reply..Now I will try to correct my code. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Doubts galore.
Hi def cript(doc=None,data =None): if doc==None and data==None:doc=sys.agv1 elif doc: data=open(doc,'r').read() data_c= binascii.hexlify(data) else:data_c= binascii.hexlify(data) if doc: q=tempfile.TemporaryFile() q.write(data_c) os.rename(q,doc) return return data_c cript(doc='./language.txt') Traceback (most recent call last): File "", line 1, in File "", line 10, in cript TypeError: coercing to Unicode: need string or buffer, file found 1)Why I got the above error message with the above function?How to correct it? 2)Is it reasonable to have 2 if blocks in a function as above? 3)Dose the tempfile create a fileobject on harddisk or in memory(Dose it save my file as I expect it to do) Please someone enlighten me. Prasad ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] writing csv files
Thanks I got it. I reached the old PEP document by searching the keyword 'excel' Thanks or the help ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] writing csv files
hello!
I got a problem writing csv file.
1)
csvw=csv.writer(open('/home/prasad/kkm','w'),
dialect='excel',fieldnames=names)
Traceback (most recent call last):
File "", line 1, in
TypeError: 'fieldnames' is an invalid keyword argument for this function
2)
for x in csvr:
...y=lambda x: ''.join([x.split()[3],x.split()[-3],x.split()[-6]])
...csvw.write(y)
...
Traceback (most recent call last):
File "", line 3, in
AttributeError: '_csv.writer' object has no attribute 'write'
At http://www.python.org/dev/peps/pep-0305/ they are using the function write
and the argument fieldnames.
Where is the problem?Please someone show me a way to do it.
Prasad
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[Tutor] parsing pyc files
Hi . If you want to see what is in a pyc file,just type od pycfile at bash command prompt. You can see only rows of numbers. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] ex-ftp
hello friends
I am trying to write a class to save a url.page.
But it is not working.It is saving the html.page.But not getting
images.I am unable to show the list (object.links).
Please take a look at it and show me how to rectify it.
import urllib2,ftplib,re
class Collect:
def __init__(self,parent):
self.parent=parent
self.links=[]
self.ims=[]
s=urllib2.urlopen(self.parent)
data=s.read()
self.data=data
a=re.compile ('<[aA].*[\'"](.*)[\'"].*>'); b=re.compile('http://www.asstr.org')
c.save(c.data)
c.bring()
#c.show(c.ims)
c.links
Thanks in advance.
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Re: [Tutor] How to convert binary files back to text files?
> . > > >I don't understand what you are trying to do. Do you mean compiled > >Python files, e.g. .pyc files? > > ?Kent > Yes I want to examine pyc files.(ex:itertools). itertools.py is not available inPython26. pyc files are binaryfiles.Isn't it. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to convert binary files back to text files?
>On 8/29/09, Geneviève DIAGORN wrote: > > >Bonjour, > >Je suis absente jusqu'au 02/09 inclus. > >En cas d'urgence Soprane, contacter notre adresse générique > >projet.sopr...@teamlog.com. > >Cordialement. > > >Geneviève I dont know your language.Please communicate in English. I am using the code below to conver string to bin and back. def tobin(astr): z=map(lambda x: bin(ord(x)),astr) return z def tostring(blist): z=map(lambda x: chr(int(x,2)),l) return ''.join(z) I dont believe it is impossible on files. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] How to convert binary files back to text files?
Hello!
I want to convert compiled files to text files.
I believe compiled files are binary files.
I am able to convert a given string to binary and back to text.
But when it comes to a file it is proving to be impossible.
def p(a):
s=open(a,'rb')
for x in s:
d=map(lambda y:chr(int(y,2)),x)
print d
s.close()
>>> p("C:/pp.txt")
Traceback (most recent call last):
File "", line 1, in
p("C:/pp.txt")
File "", line 5, in p
d=map(lambda y:chr(int(y,2)),x)
File "", line 5, in
d=map(lambda y:chr(int(y,2)),x)
ValueError: invalid literal for int() with base 2: 'f'
Please some one point where the problem is.
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Re: [Tutor] To write data in two different fonts?
> >xml.sax.saxutils.escape(/data/[, /entities/])
>
> > Escape '&', '<', and '>' in a string of data.
>
> > You can escape other strings of data by passing a dictionary as the
> >optional /entities/ parameter. The keys and values must all be
> >strings; each key will be replaced with its corresponding value. The
> >characters '&', '<' and '>' are always escaped, even if /entities/
> >is provided.
>
> >Let us know if that doesn't do the trick.
>
> >DaveA
Thank you Dave
It is working perfectly with the modifications you suggested.
def sc(adir):
entities = {'&' : '&',
'<' : '<',
'>' : '>',
'"' : '"',
"'" : '''}
import os,myfiles,xml.sax.saxutils
dest=open('C:/scripts.html','w')
s=myfiles.myfiles(adir)
dest.write('')
for x in s:
if os.path.isfile(x):
sorce=open(x,'r')
dest.write('')
dest.write(x)
dest.write('')
for l in sorce:
l=xml.sax.saxutils.escape(l,entities)
dest.write('')
dest.write(l)
dest.write('')
sorce.close()
else:pass
dest.write('')
dest.close()
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Re: [Tutor] To write data in two different fonts?
> > But I think you want the tag, which means the text is > pre-formatted. And you could >put that around the whole sorce file, instead > of doing for each line. > > >See http://www.w3schools.com/tags/tag_pre.asp Thank you Dave. I put in tag and it worked. But at one particular line in a module the font changed colour.After that all the lines are in blue colour and under lined. I removed that module from the directory and now it is working well.I could not figure out why the change of colour of font took place. Thank you ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] To write data in two different fonts?
Hello
I modified my code.But I am gettingmy my lines stripped of indentation.
What should I do to avoid it?Sorry if it is not about Python.
def sc(adir):
import os,myfiles
dest=open('C:/scripts.html','w')
s=myfiles.myfiles(adir)
dest.write('')
for x in s:
if os.path.isfile(x):
sorce=open(x,'r')
dest.write('')
dest.write(x)
dest.write('')
for l in sorce:
dest.write('')
dest.write(l)
dest.write('')
sorce.close()
else:pass
dest.write('')
dest.close()
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[Tutor] To write data in two different fonts?
Hello
I am wtriting some dat on to a file in which
headings should be of different size than other data.
Is it possible?If possible please tell me how to do it.
def sc(adir):
import os,myfiles
dest=open('C:/scripts.txt','w')
s=myfiles.myfiles(adir)
for x in s:
if os.path.isfile(x):
sorce=open(x,'r')
data=sorce.readlines()
dest.write(x+'\n','bold')
dest.write(('-'*len(x))+'\n')
for l in data:
dest.write(l)
sorce.close()
else:pass
dest.close()
>>> sc('C:\Python26\mscripts')
Traceback (most recent call last):
File "", line 1, in
sc('C:\Python26\mscripts')
File "", line 9, in sc
dest.write(x+'\n','bold')
TypeError: function takes exactly 1 argument (2 given)
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[Tutor] How to pass arguments to struct.pack()?
Hello I am finding it difficult to pass arguments to struct.pack(). Please some one tell me how to do it. >>> def structpack(alist): import struct a='%di'%len(alist) print a b=[a] print alist print b for x in alist: b.append(x) arg1=b[0] arg2=b[1:] return struct.pack.tuple(arg1,arg2) >>> structpack([112, 114, 97, 115, 97, 100, 97, 32, 114, 97, 111, 32, 110]) 13i [112, 114, 97, 115, 97, 100, 97, 32, 114, 97, 111, 32, 110] ['13i'] Traceback (most recent call last): File "", line 1, in pstruct([112, 114, 97, 115, 97, 100, 97, 32, 114, 97, 111, 32, 110]) File "", line 16, in pstruct return struct.pack.tuple(b) AttributeError: 'builtin_function_or_method' object has no attribute 'tuple' >>> ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] flag to call methods on objects?
hello
I removed the bugs.But still getting error report.
>>import mcript
Traceback (most recent call last):
File "", line 1, in
import mcript
File "C:\Python26\mcript.py", line 78, in
a.main()
File "C:\Python26\mcript.py", line 58, in main
nl=__compress(__digi(__lengthen(line.strip(+'\n'
NameError: global name '_Cripto__compress' is not defined
There is no string '_Cripto__compress' any whare in the script.
So I dont know what corrections Ineed to make in the script.
I am giving my code below again again .
#! usr/bin/env python
import ast,random,os,zlib,string
key=5
class Cripto(object):
def __init__(self,afile):
self.afile=afile
def __digi(self,astring):
y=[]
for x in astring:
y.append(ord(x))
y=str(y)
return y
def __undigi(self,astring):
alist=ast.literal_eval(astring)
y=[]
for x in alist:
y.append(chr(x))
astring=''.join(y)
return astring
def __gen_string(self):
s=''
nl=random.sample(string.ascii_letters,key)
for x in nl:s+=x
return s
def __lengthen(self,astring):
s=list(astring)
ns=''
for x in s:
ns+=x
ns+=gen_string()
return ns
def __shorten(self,astring):
s=list(astring)
ns=''
for x in range(0,len(s),key+1):
ns+=s[x]
return ns
def __compress(self,astring):
astring=zlib.compress(astring)
return astring
def __decompress(self,astring):
astring=zlib.decompress(astring)
return astring
def main(self):
sorce=open(self.afile,'r')
data=(sorce.readlines())
dest=open((os.path.split(self.afile)[0]+os.sep+'temp'),'w')
if (data[0]).strip()=='flag1':
ns='flag0\n'
data=data[1:]
for line in data:
nl= __compress(__digi(__lengthen(line.strip(+'\n'
ns+=nl
dest.write(ns)
elif data[0].strip()=='flag0':
ns='flag1\n'
data=data[1:]
for line in data:
nl= __shorten((__undigi(__decompress(line.strip()+'\n'
ns+=nl
dest.write(ns)
else:prind 'File does not begin with the flag'
sorce.close()
dest.close()
os.remove(self.afile)
os.rename((os.path.split(self.afile)[0]+os.sep+'temp'),self.afile)
#
a=Cripto('C:/pp.txt')
a.main()
<\code>
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Re: [Tutor] flag to call methods on objects?
On 7/30/09, Dave Angel wrote: > > prasad rao wrote: > >> hello >> >> >"it is not working." is not very descriptive. >> >> >> DaveA >> >Hello! Sorry, I forgot to mention the problem. It simply wipes clean the file,resulting in empty file. Yes .I should compare with a string.Hope I will get it right with that correction. Thank you Wayne. I never know string module can be used for encryption. I will try all those methods(shown by you) in my module. Thank you all Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] flag to call methods on objects?
On 7/30/09, Rich Lovely wrote: > > 2009/7/30 prasad rao prasadarao...@gmail.com: >I'm sure there are modules available for PGP that are either part of > >the stdlib, or available from a quick google. PGP (or GPG) encryopts > I never know there is an encryption module in stdlib. What is its name? Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] flag to call methods on objects?
hello
I wanted to prevent other users of my computers to read my files.
So tried to creat a module to achieve it.
I used a flag to deside which methods to be called on the object.
somehow it is not working.I realise after 2 days of struggle that
as it is usuel , I am blind to my faults.
I tested all the metheds except main() in idle interactively,found them
working.
So there is a bug in the main(), kan anyone point it out to me?
#! usr/bin/env python
import ast,random,os,zlib,string
key=5
class Cripto(object):
def __init__(self,afile):
self.afile=afile
def __digi(self,astring):
y=[]
for x in astring:
y.append(ord(x))
y=str(y)
return y
def __undigi(self,astring):
alist=ast.literal_eval(astring)
y=[]
for x in alist:
y.append(chr(x))
astring=''.join(y)
return astring
def __gen_string(self):
s=''
nl=random.sample(string.ascii_letters,key)
for x in nl:s+=x
return s
def __lengthen(self,astring):
s=list(astring)
ns=''
for x in s:
ns+=x
ns+=gen_string()
return ns
def __shorten(self,astring):
s=list(astring)
ns=''
for x in range(0,len(s),key+1):
ns+=s[x]
return ns
def __compress(self,astring):
astring=zlib.compress(astring)
return astring
def __decompress(self,astring):
astring=zlib.decompress(astring)
return astring
def main(self):
sorce=open(self.afile,'r')
data=(sorce.readlines())
dest=open ((os.path.split(self.afile)[0]+os.sep+'temp'),'w')
if data[:1]=='flag1\n':
ns='flag0\n'
data=data[1:]
for line in data:
nl=__compress((__digi(__lengthen(line.strip()+'\n'
ns+=nl
dest.write(ns)
elif data[:1]=='flag0\n':
ns='flag1\n'
data=data[1:]
for line in data:
nl=__decompress((__undigi(__shorten(line.strip()+'\n'
ns+=nl
dest.write(ns)
sorce.close()
dest.close()
os.remove(self.afile)
os.rename((os.path.split(self.afile)[0]+os.sep+'temp'),self.afile)
#
a=Cripto('C:/pp.txt')
a.main()
<\code>
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Re: [Tutor] my first gui
Hello Thanks I will implement your suggestions. True .Names and parameters are not descriptive. There are no comments(docstrings) in the program . There is scope to reduce number of functions. Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] my first gui
Hello.
I made my first mager gui program.I need your openions suggestions and
improvements.
#! usr\\bin\\env python
from Tkinter import *
def myfiles (n='',m=''):
import os
mf=[os.path.join(x,i)for x,y,z in os.walk(n) for i in z if
i.endswith(m)]
return mf
def fshow():
tclear()
x=entry1.get()
try:
value1,value2=x.split(',')
mf=myfiles(value1,value2)
text.insert(END,('Total files in %s are %d
\n'%(entry1.get(),len(mf)))+ mystring(mf))
except:
mf=myfiles(x)
text.insert(END,('Total files in %s are %d
\n'%(entry1.get(),len(mf)))+ mystring(mf))
def atime(x):
import time
import os
atime=time.strftime("%c",time.localtime(os.path.getatime(x)))
return atime
def mtime(x):
import time
import os
mtime=time.strftime("%c",time.localtime(os.path.getmtime(x)))
return mtime
def ctime(x):
import time
import os
ctime=time.strftime("%c",time.localtime(os.path.getctime(x)))
return ctime
def mystring(x):
q=''
for n,m in enumerate(x,start=1):
o=str(n)+'.'+str(m)
q+=(o+'\n')
return q+'\n'
def info():
tclear()
import glob,os
mf=''
md=''
mfl,mdl=[],[]
mdd=glob.glob(entry1.get()+os.sep+'*')
for x in mdd:
if os.path.isfile(x)==True:
mfl.append(x)
else:mdl.append(x)
mf+=mystring(mfl)
md+=mystring(mdl)
mf=("Total files in %s are %d \n\n"%(entry1.get(),len(mfl)))+mf
md=('Total directories in %s are %d
\n\n'%(entry1.get(),len(mdl)))+md
mf+='\n\n'
text.insert(END,mf+md)
def destroy():
root.destroy()
def eclear():
entry1.delete(0,END)
entry2.delete(0,END)
entry3.delete(0,END)
entry4.delete(0,END)
def tclear():
text.delete(1.0,END)
def ashow():
x=entry1.get()
try:
n,m=x.split(',')
value=atime(n)
except:value=atime(x)
entry2.insert(0,value)
def mshow():
x=entry1.get()
try:
n,m=x.split(',')
value=mtime(n)
except:value=mtime(x)
entry3.insert(0,value)
def cshow():
x=entry1.get()
try:
n,m=x.split(',')
value=ctime(n)
except:value=ctime(x)
entry4.insert(0,value)
root = Tk()
frame1=Frame(root,relief='sunken',border=1)
frame1.pack(side='top',expand="true")
frame2=Frame(root,relief='sunken',border=1)
frame2.pack(side='top',expand="true")
frame3=Frame(root,relief='sunken',border=1)
frame3.pack(side='top',expand="true")
frame4=Frame(root,relief='sunken',border=1,)
frame4.pack(side='top',expand="true")
frame5=Frame(root,relief='sunken',border=1)
frame5.pack(side='top',expand="true")
label5=Label(frame1,text="Enter file path to get information about the file
\
or enter directory(or directory,fileextension) to get files init ",border=1)
label5.pack(side='top',fill='both')
b1=Button(frame2,text='quit',command=destroy,border=1)
b1.pack(side='left',padx=5,pady=5)
b2=Button(frame2,text='clear',command=eclear,border=1)
b2.pack(side='left',padx=5,pady=5)
b3=Button(frame2,text='accessed',command=ashow,border=1)
b3.pack(side='left',padx=5,pady=5)
b4=Button(frame2,text='modified',command=mshow,border=1)
b4.pack(side='left',padx=5,pady=5)
b5=Button(frame2,text='created',command=cshow,border=1)
b5.pack(side='left',padx=5,pady=5)
b5=Button(frame2,text='files',command=fshow,border=1)
b5.pack(side='left',padx=5,pady=5)
b6=Button(frame2,text='deltxt',command=tclear,border=1)
b6.pack(side='left',padx=5,pady=5)
b7=Button(frame2,text='files+dirs',command=info,border=1)
b7.pack(side='left',padx=5,pady=5)
label4=Label(frame3,text="Enter full path",border=1)
label4.pack(side='left',fill='both')
entry1=Entry(frame3,relief='sunken',border=1)
entry1.pack(side='left',fill='both')
lable1=Label(frame3,text='access time',border=1)
lable1.pack(side='left',fill='both')
entry2=Entry(frame3,relief='sunken',border=1)
entry2.pack(side='left',fill='both')
lable2=Label(frame3,text='modifide time',border=1)
lable2.pack(side='left',fill='both')
entry3=Entry(frame3,relief='sunken',border=1)
entry3.pack(side='left',fill='both')
lable3=Label(frame3,text='created time',border=1)
lable3.pack(side='left',fill='both')
entry4=Entry(frame3,relief='sunken',border=1)
entry4.pack(side='left',fill='both')
text=Text(frame4,relief='sunken',border=1,width=130,height=40,padx=5,pady=5)
text.pack(side='top')
text.xview(SCROLL,30,UNITS)
text.yview(SCROLL,30,UNITS)
root.title("info of file")
root.mainloop()
==
Thank you
Prasad
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[Tutor] Text.insert()
Hello >> I created a gui app.I am finding it impossible to >> use Text.insert().please some one give an example of using it. >Look in my tutorial at event driven programming and the Case >study. Both use the Text widget. >For more detailed info try this introduction: >http://www.linuxjournal.com/article/7357 >Or for more detailed info: >http://www.pythonware.com/library/tkinter/introduction/x7883->concepts.htm Thank you,I got it right.I am reading your tutor for the 3rd time. The web sights you pointed above are of good help. Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Text.index()
Hello
I created a gui app.I am finding it impossible to
use Text.insert().please some one give an example of using it.
def fshow():
x=entry1.get()
try:
value1,value2=x.split(',')
text.insert(len(myfiles(value1,value2)),myfiles(value1,value2))
except:
text.insert(len(myfiles(value1,value2)),myfiles(x))
>>> import example4
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__
return self.func(*args)
File "C:\Python26\example4.py", line 37, in fshow
text.insert(len(myfiles(value1,value2)),myfiles(x))
File "C:\Python26\lib\lib-tk\Tkinter.py", line 3001, in insert
self.tk.call((self._w, 'insert', index, chars) + args)
TclError: bad text index "178"
import example4
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__
return self.func(*args)
File "C:\Python26\example4.py", line 37, in fshow
text.insert(None,myfiles(x))
File "C:\Python26\lib\lib-tk\Tkinter.py", line 3001, in insert
self.tk.call((self._w, 'insert', index, chars) + args)
TclError: wrong # args: should be ".18428952.18430232 insert index chars
?tagList chars tagList ...?"
I cant understand what these error messages are telling.
Thanking you
Prasad
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Re: [Tutor] ?????
>for attrib in dir(sys):
> > if callable('sys.%s' % attrib):
> >print 'Callable: sys.%s' % attrib
> > else:
> >print 'Not Callable: sys.%s' % attrib
>
> Any particular reason why you need to be able to do this, just wondering
> about the use case for such automation ?
>
> --
> Kind Regards,
> Christian Witts
>
>
>
Hello
It is printing wether the item is callable or not.
I want it to print
sys.getdefaultencoding
ASCII
sys.getfilesystemencoding
mbcs
Like that
Prasad
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Re: [Tutor] ?????
> > >Any particular reason why you need to be able to do this, just wondering > about the use case for >such automation ? > > -- > Kind Regards, > Christian Witts > > > Thank you Christian for the prompt repply. I am learning python. I am just examining what are all the available items in each module . I tried to use getatter but somehow I could not succeed. Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] ?????
hello I get a problem while trying to print non callable items in dir(module).May be as the items are strings. for x in dir(sys): ?? if sys.x is callable: print sys.x() ?? else:print sys.x Traceback (most recent call last): File "", line 2, in if sys.x is callable: AttributeError: 'module' object has no attribute 'x' Some one please tell me How can I do that? Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Is it syntactic,semantic or runtime?
hellothanks .After inserting back slashes and de.close it is working well thanks for the help prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Is it syntactic,semantic or runtime?
helloI wrote a function to fetch data using urllib and displaying the data
using internet Explorer.
it is not preparing the html file
So opening blank Explorer after complaining th html file not found.
Where is the problem?
Can I display the data read from a site without preparing
a html file?
def pp():
@@@ import urllib
@@@ import subprocess
@@@ so=urllib.urlopen('http://www.asstr.org')
@@@ data=so.read()
@@@ de=open('C:pp.html','w')
@@@ de.write(data)
@@@ subprocess.Popen(['C:\Program Files\Internet
xplorer\\IEXPLORE','C:pp.html'])
prasad
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[Tutor] re Format a file
Hello >> for line in so: >> if len(line)<70:de.write(line+'\n') >> if len(line)>70: >> da=textwrap.fill(line,width=60) >> de.write(da+'\n') >What happens if the line is exactly 70 characters long? >I think you want an else instead of the second if >Alan G >Author of the Learn to Program web site True.Thanks for pointing out the folly. I might have lost bits of data. Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] re Format a file
HelloFinally I managed to writ a function to format a file. Thank to everybody for their tips. def mmm(a): import os,textwrap so=open(a) d=os.path.dirname(a)+os.sep+'temp.txt' de=open(d,'w') import textwrap for line in so: if len(line)<70:de.write(line+'\n') if len(line)>70: da=textwrap.fill(line,width=60) de.write(da+'\n') so.close() de.close() Any improvements and suggestions are welcome. Thanks Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] re Format a file
HelloI don't know why, but this I think going into infinite loop.
I cant see anything wrong in it.
Please show me where the problem is.
def myform(s):
import os
so=open(s)
d=os.path.dirname(s)+os.sep+'temp.txt'
de=open(d,'w')
for line in so:
while len(line)>60:
tem=line[60:]
try:
??? a,b=tem.split(' ',1)
??? de.write(line[:60]+a+'\n')
??? line=b
except ValueError:pass
de.write(line+'\n')
so.close()
de.close()
os.remove(s)
os.rename(d,s)
Thank you
Prasad
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[Tutor] re.format a file
helloThank you Lie and Kent. I forgot about newline character and the fact that string can be sliced. Thanks for your timely help BTW I have gone through the Python library reference and find no examples in fileinput module. z=fileinput.input(file,inplace=1) for line in z: ???if len(line)<60:pass ???if len(line)>60: ??line=line[:60]+'\n'+line[60:] Is it the right way to do? Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] format a file
hello
I find it difficult to use horizontal scroll bar to read text documents.
So I want to split lines in the text file in to two lines.
def myforrmat(source,desty):
so=open(source)
de=open(desty,'w')
for line in so:
? if len(line)<60:de.write(line)
? if len(line)>60:
de.write(''.join(list(line)[:60]))
de.write(''.join(list(line)[60:]))
so.close()
de.close()
This code is not working.Destination file have the same length of lines
to source file
Some one please show where the problem is.
I tried to do it using fileinput module and inplace flag. in vain.
please some one show me how to do it.
Thank you
Prasad
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[Tutor] Formatting
hi
for license in licenses:
m = licenseRe.search(license)
print m.group(1, 2)
('ABTA', 'No.56542')
('ATOL', None)
('IATA', None)
('ITMA', None)
Yes It is working
Thank you
Prasad
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[Tutor] re Formating
hi >>> licenseRe = re.compile(r'\(([A-Z]+)\)\s*(No.\d+)?') >>> for license in licenses: m = licenseRe.search(license) print m.group(1, 3) Traceback (most recent call last): File "", line 3, in print m.group(1, 3) IndexError: no such group Something wrong with this code. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Formatting
hi.
s = 'Association of British Travel Agents (ABTA) No.56542\nAir Travel
Organisation Licence (ATOL)\nAppointed Agents ofIATA (IATA)\nIncentive
Travel & Meet. Association (ITMA)'
licenses = re.split("\n+", s)
licenseRe = re.compile(r'\(([A-Z]+)\)( No. (\d+))?')
>>> for license in licenses:
m = licenseRe.search(license)
print m.group(1, 3)
('ABTA', None)
('ATOL', None)
('IATA', None)
('ITMA', None)
The no 56542 is not getting into m.group()
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[Tutor] re Binding Event
HelloI changed the code as follows.But still the callback function is not
working.
The he() is working well but clicking on the frame has no result.
class app:
def __init__(self,root):
frame=Frame(root)
frame.bind("", callback)
frame.pack()
self.button=Button(root,text='quit',fg='red',command=frame.quit)
self.button.pack(side='left')
self.hi=Button(root,text='hi',fg='SystemWindowFrame',command=self.hi)
self.hi.pack(side='right')
self.callback
def hi (self): print 'hello! there'
def callback(self,event):
print "clicked at", event.x, event.y
>>> root=Tk()
>>> xx=app(root)
>>> root.mainloop()
hello! there
hello! there
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[Tutor] re.Binding Events
HelloI tried various permutations of the code.Nothing worked.
I am mixing 2 examples given in "an-introduction-to- tkinter "
by Fredrik Lundh.(and got this code)
Today I got this error message
Traceback (most recent call last):
File "", line 1, in
pp()
File "", line 18, in pp
xx=app(root,event)
NameError: global name 'event' is not defined
Example1=
# File: hello2.py
from Tkinter import *
class App:
def __init__(self, master):
frame = Frame(master)
frame.pack()
self.button = Button(frame, text="QUIT", fg="red", command=frame.quit)
self.button.pack(side=LEFT)
self.hi_there = Button(frame, text="Hello", command=self.say_hi)
self.hi_there.pack(side=LEFT)
def say_hi(self):
print "hi there, everyone!"
root = Tk()
app = App(root)
root.mainloop()
Running the Example
Example2=
# File: bind1.py
from Tkinter import *
root = Tk()
def callback(event):
print "clicked at", event.x, event.y
frame = Frame(root, width=100, height=100)
frame.bind("", callback)
frame.pack()
root.mainloop()
How can I mix the two?
Prasad
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[Tutor] Binding Events
Hi I am unable to bind an event to a widget despite of my best efforts.
Some one please help me.
class app:
def __init__(self,root):
frame=Frame(root)
frame.bind('',self.callback)
frame.pack()
self.event=event
self.button=Button(root,text='quit',fg='red',command=frame.quit)
self.button.pack(side='left')
self.hi=Button(root,text='hi',fg='SystemWindowFrame',command=self.hi)
self.hi.pack(side='right')
self.callback
def hi (self): print 'hello! there'
def callback(self,event):
print "clicked at", event.x, event.y
from Tkinter import *
root=Tk()
xx=app(root,event)
root.mainloop()
Thanks in advance
Prasad
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[Tutor] re division problem
hi I modified my function ' vertical' by adding a few characters to
eliminate
the division problem.
def vertical(columns):
if columns>7:
columns=7
import string
v=string.printable
v=v.replace('\n','')
v=v.replace('\t','')
if len(v)%columns !=0:
v=v+ v[:columns-(len(v)%columns)]
for x in range(len(v)/columns):
for y in range(x,len(v),len(v)/columns):
print v[y],'=','%3d'%ord(v[y]),' '*3,
print
Thank you
Prasad
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[Tutor] re division problem
hi>Right now you skip by x+((len(v))/columns) >which will be different for each row. How is it possible. len(v)=98.A constant. Is it not. Does len(v) changes with each iteration? Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] re weird bool
helloyes.you are right. >>> 2==True False It is an unexpected result to me. I thought any value other than 0 is True. And the solution provided by you(bool(a/1)) is useful to me. Thank you Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] re division problem
> I wrote a function named vertical to print string .printable characters
and
.>> ASCII values in a table.
>> 1)It is swallowing some characters.
>> 2)It output some characters 2 or 3 times.
>> 3)It prints one column more than what I asked for.
>> def vertical(columns):
>> import string
>> v=string.printable
>> v=v.replace('\n','')
>> v=v.replace('\t','')
>What is len(v) here? What is len(v)/columns?
There are 100 characters in the string(string.printable)
I deleted '\n\t'. So 98/say 4==24.5 So if there is a fraction
I have to round it off to 1. So 24.5 should be rounded off
to 25..But is there a better way to print it in given number
of columns
>> for x in range((len(v))/columns):
>> for y in range(x,len(v),x+((len(v))/columns)):
>The third argument to range() is the step size. Do you want to use a
>different step size for each row?
No. How can I ensure that every value is an integer but without missing
in retrieving an element in the string.
Prasad
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[Tutor] weird bool
hi >>> a=2.1 >>> a%1==True False >>> a%1==False False >>> b=3.8 >>> b%1==True False >>> b%1==False False If it gives correct bool, it could be put to good use. Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Division problems
HelloI wrote a function named vertical to print string .printable characters
and ASCII values in a table.
1)It is swallowing some characters.
2)It output some characters 2 or 3 times.
3)It prints one column more than what I asked for.
It may be a division problem(floating point).
Its sibling called horizontal got no problems.
please examine it and give suggestions and improvements to set it right.
#!usr\\bin\\env python
def horizontal(columns):
import string
n=0
v=string.printable
v=v.replace('\n','')
v=v.replace('\t','')
while n___
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[Tutor] Thank you
Hello Thanks .Today I learned to use operator.itemgetter() to set key. Thank you prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] set key to sort
hellI got a problem sorting a list of lists. ml= [[112, 'p'], [114, 'r'], [97, 'a'], [115, 's'], [97, 'a'], [100, 'd'], [97, 'a'], [114, 'r'], [97, 'a'], [111, 'o']] sorted(ml,key=?) How can I formulate a key to sort based on the first element of each list. sorting list of lists might have been discussed in the resent past. Is there a repository of all threads of this list on the web. thank you prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Thanks
Hello Your code is concise and neat.It will take some time for me
to understand how it is doing the job. Thank you
>You have a lot of duplicated code. You can reduce the duplication by
>using functions and loops.
>The first step is to put all the print code into a function rather
>than repeating the same three formatting expressions over and over:
>def show(x, y):
> print '%3d'%(x),'x','%3d'%(y),'=','%3d'%(x*y),(' '*5),
>Then mtab() can be written like this:
>def mtab(*arg):
> for x in range(1,11):
show(x, arg[0])
show(x, arg[1])
show(x, arg[2])
print
print(('-')*10).center(78)
for x in range (1,11):
show(x, arg[3])
show(x, arg[4])
show(x, arg[5])
print
>Now you can see that the show() statements are still repetitive, they
>can be put into a loop:
>def mtab(*arg):
> for x in range(1,11):
for i in range(0, 3):
show(x, arg[i])
print
print(('-')*10).center(78)
for x in range (1,11):
for i in range(3, 6):
show(x, arg[i])
print
>This is OK except the interface is awkward; do you really want to tell
>it each number for the table, or would you rather give it a range of
>numbers? Also you can use another loop to eliminate the duplicated
>printing of the tables:
>def mtab(lower, upper):
for start in range(lower, upper+1, 3):
for x in range(1,11):
for y in range(start, start+3):
show(x, y)
print
print(('-')*10).center(78)
>mtab(1, 11)
>This does not give quite the same result as your original - it prints
>the divider after each table - and it always prints three tables per
>group, even if you didn't ask for it - but it is much simpler and more
>flexible than your original.
>Kent
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[Tutor] multiplication table
HiI tried to print multiplication table using (*args) to pass parameters.and
tried
to print tables side by side.But the code looks messy .Is there a better way
to do it.
def mtab(*arg):
for x in range(1,11):
print '%3d'%(x),'x','%3d'%(arg[0]),'=','%3d'%(x*arg[0]),(' '*5),\
'%3d'%(x),'x','%3d'%(arg[1]),'=','%3d'%(x*arg[1]),(' '*5),\
'%3d'%(x),'x','%3d'%(arg[2]),'=','%3d'%(x*arg[2]),(' '*5)
print(('-')*10).center(78)
for x in range (1,11):
print '%3d'%(x),'x','%3d'%(arg[3]),'=','%3d'%(x*arg[3]),(' '*5),\
'%3d'%(x),'x','%3d'%(arg[4]),'=','%3d'%(x*arg[4]),(' '*5),\
'%3d'%(x),'x','%3d'%(arg[5]),'=','%3d'%(x*arg[5]),(' '*5)
Prasad
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[Tutor] re
Hello
I am trying to get a value as integer and a string.
>>> class Value:
def __init__(self,inte='',stri=''):
self.inte=inte
self.stri=stri
def setvalue(self,inte='',stri=''):
self.stri=str(self.inte)
self.inte=int(self.stri)
>>> v=Value(45)
>>> print v.stri
>>> v.inte
45
>>> v.stri
''
>>> c=Value('36')
>>> c.stri
''
>>>
But it is not converting.How can I do it?
Prasad
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Re: [Tutor] Convert values in a list back and forth from ints
. class Value:def __init__(self, vs = ""): >... self.vs = vs >... self.v = self.asInt() >...def asInt(self): >... try: self.v = int(self.vs) >... except: self.v = None >... return self.v >...def asString(self): >...vs = str(self.vs) >...return self.vs >...def setStringValue(self, s): >...self.vs = s >...self.asInt() >...def setIntValue(self, i): >...self.v = int(i) >...self.vs = str(self.v) hello Sorry to interject. This class seems asymmetric. Class Value: def __init__(self,inte='',stri=''): self.inte=inte self.stri=stri def setvalue(inte='',stri=''): self.stri=str(self.inte) self.int=int(self.stri) I tried. But failed.What is wrong with above code? >>> Class Value: def __init__(self,inte='',stri=''): self.inte=inte self.stri=stri def setvalue(inte='',stri=''): self.stri=str(self.inte) self.int=int(self.stri) SyntaxError: invalid syntax Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] repply
hi I got it right. >>> z=[] >>> for x in range(1000): if divmod(x,3)[1]==0:z.append(x) if divmod(x,5)[1]==0:z.append(x) >>> sum(set(z)) 233168 I am sorry if this is outside the perimeter of this list. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] project euler
hello! I got it 266333. My code== t=0 for x in range(1000): if divmod(x,3)[1]==0:t+=x if divmod(x,5)[1]==0:t+=x t=266333 Am I correct in comprehention of the problem? Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] reply
Hello. Thank you.Just a small change at the optional parameter made all the difference. It seems to be a mirracle.It is an enlitenment to me. Thank you. Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] optional parameter in list comprehension
hello!I am a novice looking up to the tutor as my Guide.
I got a problem while using optional parameter.
#! user/bin/env python
import os
def myfiles(directory,extension=None):
for x in [os.path.join(x,i) for x,y,z in os.walk(directory)\
for i in z if i.endswith(extension)]:print x
if __name__=='__main__':
import sys
myfiles(sys.argv[1],sys.argv[2])
>>> myfiles.myfiles('C:\\python26')
Traceback (most recent call last):
File "", line 1, in
myfiles.myfiles('C:\\python26')
File "C:\Python26\lib\site-packages\myfiles.py", line 6, in myfiles
for i in z if i.endswith(extension)]:print x
TypeError: expected a character buffer object
>>> myfiles.myfiles('C:\\python26','doc')
C:\python26\Doc\examples.doc
How can I rectify this?
Thanks
Prasad
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[Tutor] Repply
Thanks for help. > http://svn.python.org/view/python/trunk/Objects/listobject.c?rev=67498&view=markup Kent ! This is grek and latin to me.From the presence of header files it looks C++.But headerfiles are not between '<' and '>' . >But why are you trying to sort in this fashion? Alan Gauld! Basic exercises in C++ are to find min , malimum and sorting.So I am just trying it in python. Thank you Mark. Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] to sort
hello I am trying to sort a list(I know there is a builtin sort method). a=[21,56,35,47,94,12] b=[] for x in a: b.append (min(a)) a.remove (min(a)) >>> a [56, 47, 94] >>> b [12, 21, 35] It is not Compleating .Doing only 3 rounds.Why? By the way how can I view the builtin code for sort method? Wish you all Happy Xmass. thanks Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] To print docstrings
Hello friends. I am new to programing.I am learning Python. I failed in my attempts to retrive doc strings of methods in a module. """ for x in dir(logging): print x,x.__doc__ = for x in dir(collections): print x,collections.x.__doc__ == >>> def dd(o): zx=dir (o) for x in zx: ax=o+x print ax.__doc__ >>> dd(collections) def dd(o): zx=dir (o) for x in zx: ax=str(o)+x print ax.__doc__ >>> >>> dd(collections) """ Above snippets of code generates str.__doc__ for every iteration. Please someone tell me how I can retrive all the docstrings ina module thanks in advance Prasad ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
