Re: [Tutor] Only appending one object to list, when I am expecting more than 1
On 2019-02-27 05:25, AdamC wrote: That's great - bug found. Thanks. However the next question is, how do I create an instance of a class with variable parameters (i.e. with dateAdded already computed and stored, or with dateAdded created for the first time)? Might this work? class myClass(object): __init__(self, added_date=None): if added_date: self.date_attribute = added_date else: self.date_attribute = my_way_of_calculating_added_date() You can then instantiate in either of these ways: my_instance = myClass() or my_instance = myClass(my_way_of_calculating_added_date()) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] ANSI / VT100 Escape Codes in Windows 7 Environment
On Wed, Feb 27, 2019 at 6:50 PM Chip Wachob wrote: > > Hello again, > > As always, this list has been very helpful, and thank you. > > So, I thought I was good to go until I attempted to run my code on a > Windows 7 vintage machine this morning. The application is intended to be > run in the command window in Windows, from the terminal in Linux... > > In the code I had included the ANSI escape characters so I could invert the > text and change the color. Basically, I wanted to make the warning / error > messages stand out from the crowd. As I have been on a "curses" kick lately, I wonder if it would work for you? Of course this means another module, but it is in the standard lib on all non-Windows Python versions. For Windows I found this thread on stackoverflow: https://stackoverflow.com/questions/32417379/what-is-needed-for-curses-in-python-3-4-on-windows7 The checked answer gives a link to binaries for Windows, which seems to support all Python versions through 3.7, including 2.7. Just a thought... -- boB ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
On Wed, Feb 27, 2019 at 8:09 PM Alex Kleider wrote: > > On 2019-02-27 17:48, boB Stepp wrote: > > Under https://docs.python.org/3/library/curses.html#window-objects in > > the curses docs, it states: > > > > > > window.addch(ch[, attr]) > > window.addch(y, x, ch[, attr]) > > [...] > > > > Note > > > > Writing outside the window, subwindow, or pad raises a curses.error. > > Attempting to write to the lower right corner of a window, subwindow, > > or pad will cause an exception to be raised after the character is > > printed. > > Could it be that as soon as the character is printed the cursor moves to > the 'next location' which is outside of the 'window, subwindow, or pad' > and it is this which causes the error to be raised? Alex, I think you have nailed it! Everything I have read so far indicates that an exception will be thrown whenever attempting to write outside of a window, subwindow or pad. So it would appear to follow that if for some reason I need to write something to that very last cell I will have to handle the exception generated. Thanks! -- boB ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
On 2019-02-27 17:48, boB Stepp wrote: Under https://docs.python.org/3/library/curses.html#window-objects in the curses docs, it states: window.addch(ch[, attr]) window.addch(y, x, ch[, attr]) [...] Note Writing outside the window, subwindow, or pad raises a curses.error. Attempting to write to the lower right corner of a window, subwindow, or pad will cause an exception to be raised after the character is printed. Could it be that as soon as the character is printed the cursor moves to the 'next location' which is outside of the 'window, subwindow, or pad' and it is this which causes the error to be raised? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] ANSI / VT100 Escape Codes in Windows 7 Environment
On 2/27/19, Alan Gauld via Tutor wrote: > On 27/02/2019 18:28, Chip Wachob wrote: >> Windows 7 vintage machine this morning. > > Caveat: I have no direct experience on Windows 7 - I jumped > from XP to Windows 8... Also I haven't used ANSIO codes in > Windows since the heady days of Windows 98! But... > >> run in the command window in Windows, from the terminal in Linux... > > Be aware that ANSI codes in DOS don't correspond directly > with the VT100 control codes commonly used in Linux etc. > You might get some things that either don;t work or work > slightly differently. > >> In the code I had included the ANSI escape characters so I could invert >> the >> text and change the color. > > Again remember that old ANSI terminals didn't have colors. > (They were either green on black, white on black, or if you > were really fancy, amber on black). > > Color came later so some terminal emulators won't do anything > with those codes. > >> As I have now learned, Windows 7 does not support this functionality. >> What do the experts out there suggest as the path of least pain and >> suffering? > > No idea if this works on Windows 7 but what we used to have > to do was load the ANSI.SYS driver in the CONFIG.SYS file > located in the root directory of the boot drive. Windows NT systems use the Windows console API, which talks to a console that's hosted in a system process. In Windows 7+, each console is hosted in an instance of conhost.exe. In older versions of NT, consoles are hosted by threads in the session server process, csrss.exe. In 32-bit builds of NT, there's integration between the console and the virtual DOS machine (ntvdm.exe). This allows running old 16-bit DOS programs/drivers such as COMMAND.COM and ANSI.SYS in an emulated DOS environment. 64-bit builds no longer support NTVDM. Anyway, it wouldn't apply to Windows console applications such as python.exe, which have nothing to do with DOS. The only practical option is to implement VT sequences using the console API, such as is done by the colorama package. Other options require installing an alternate console (e.g. ConEmu) or a program that hacks the console API in each process via DLL injection (e.g. ANSICON). ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] Why does using "window.addchr()" to place a character at the lower right corner raise an exception?
Under https://docs.python.org/3/library/curses.html#window-objects in the curses docs, it states: window.addch(ch[, attr]) window.addch(y, x, ch[, attr]) [...] Note Writing outside the window, subwindow, or pad raises a curses.error. Attempting to write to the lower right corner of a window, subwindow, or pad will cause an exception to be raised after the character is printed. Why is this? What is special about the lower right corner of a terminal window? I am guessing this is some relic of the original terminal era. TIA! -- boB ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] ANSI / VT100 Escape Codes in Windows 7 Environment
On 2/27/19, Chip Wachob wrote: > > I've been spending the morning looking at different solutions. Many of > them seem to involve either including yet aother module, or, worse (IMHO) a > C library that will 'emulate' the ANSI escape sequences, API calls, etc. To support virtual-terminal sequences prior to Windows 10, you'll need a package such as colorama [1] that implements VT sequences in terms of the Windows console API -- unless you're willing to require an alternate console such as ConEmu or an API hack such as ANSICON. [1]: https://pypi.org/project/colorama ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] ANSI / VT100 Escape Codes in Windows 7 Environment
On 27/02/2019 18:28, Chip Wachob wrote: > Windows 7 vintage machine this morning. Caveat: I have no direct experience on Windows 7 - I jumped from XP to Windows 8... Also I haven't used ANSIO codes in Windows since the heady days of Windows 98! But... > run in the command window in Windows, from the terminal in Linux... Be aware that ANSI codes in DOS don't correspond directly with the VT100 control codes commonly used in Linux etc. You might get some things that either don;t work or work slightly differently. > In the code I had included the ANSI escape characters so I could invert the > text and change the color. Again remember that old ANSI terminals didn't have colors. (They were either green on black, white on black, or if you were really fancy, amber on black). Color came later so some terminal emulators won't do anything with those codes. > As I have now learned, Windows 7 does not support this functionality. > What do the experts out there suggest as the path of least pain and > suffering? No idea if this works on Windows 7 but what we used to have to do was load the ANSI.SYS driver in the CONFIG.SYS file located in the root directory of the boot drive. A quick Google suggests that Windows supports config.nt as a replacement for CONFIG.SYS. Try creating such a file (or editing the existing one) with the line DEVICE=ANSI.SYS And see if that helps. (You might need a reboot or at least a restart of the console) Also it seems that the 32 bit version of ANSI.SYS does not support cursor positioning. But if you only want bold/flashing/underlined text in differing colors you should be OK... -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] ANSI / VT100 Escape Codes in Windows 7 Environment
Hello again, As always, this list has been very helpful, and thank you. So, I thought I was good to go until I attempted to run my code on a Windows 7 vintage machine this morning. The application is intended to be run in the command window in Windows, from the terminal in Linux... In the code I had included the ANSI escape characters so I could invert the text and change the color. Basically, I wanted to make the warning / error messages stand out from the crowd. Eg: # there's an error in the loop, report it # format reverse with yellow background print "\033[7m\033[33m" print " ERROR IN LOOP SIZE" . . . # clear formatting print "\033[m" As I have now learned, Windows 7 does not support this functionality. Development had been done on a Windows 10 (and Ubuntu) machine where this worked just fine. I've been spending the morning looking at different solutions. Many of them seem to involve either including yet aother module, or, worse (IMHO) a C library that will 'emulate' the ANSI escape sequences, API calls, etc. Before I go tearing into my currently working code, I'm looking for feedback from those much more experienced. I need this code to run correctly on both Windows 7 and 10 (future Linux) and I'm stuck with Python 2.7 due to other module limitations. What do the experts out there suggest as the path of least pain and suffering? Again, thank you for your time and guidance. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Only appending one object to list, when I am expecting more than 1
On 27/02/2019 13:25, AdamC wrote: > That's great - bug found. Thanks. However the next question is, how do I > create an instance of a class with variable parameters (i.e. with dateAdded > already computed and stored, or with dateAdded created for the first time)? > > I hope that makes sense. Not really. There are several possible interpretations of your question. When asking concept things it often helps to include some hypothetical examples of what you would like to happen. For example in this case you might say you want: c = myClass() # default c2 = myClass(anInt,aString) # two args c3 = myClass(aDate,aFloat) # two different args etc. Or you maybe wanted something else? If so show us how you think it would work and we can then show you how to get something close. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Only appending one object to list, when I am expecting more than 1
Without spending a lot of time on an answer, you can use default arguments in the cases where only the number of arts differs in your instance creation. If there's larger differences, look into @classmethod. On February 27, 2019 5:25:02 AM PST, AdamC wrote: >That's great - bug found. Thanks. However the next question is, how do >I >create an instance of a class with variable parameters (i.e. with >dateAdded >already computed and stored, or with dateAdded created for the first >time)? > >I hope that makes sense. > >Adam > >On Tue, 26 Feb 2019 at 18:24, Tobiah wrote: > >> >> >> On 2/26/19 6:39 AM, AdamC wrote: >> > Sorry folks - my code didn't work due to my debug var count to >ensure >> that >> > I was looping properly. >> > >> > It should be: >> >> As was pointed out, the problem is not in your code. It's in your >> data. You only have one record with a proper 'tpe' value, so that's >> all you get in your media list. >> >> >> Toby >> ___ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> https://mail.python.org/mailman/listinfo/tutor >> > > >-- >-- >You back your data up on the same planet? >http://www.monkeez.org >PGP key: 0x7111B833 >___ >Tutor maillist - Tutor@python.org >To unsubscribe or change subscription options: >https://mail.python.org/mailman/listinfo/tutor -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Only appending one object to list, when I am expecting more than 1
Without fully understanding what you're getting at, I'll offer this:
class Car(object):
def __init__(self, **kwargs):
self.features = {
'make': 'Hyundai',
'color': 'purple'
}
self.features.update(kwargs)
c = Car(color='yellow', year=2017)
print c.features
output:
{'color': 'yellow', 'make': 'Hyundai', 'year': 2017}
On 2/27/19 5:25 AM, AdamC wrote:
That's great - bug found. Thanks. However the next question is, how do I
create an instance of a class with variable parameters (i.e. with dateAdded
already computed and stored, or with dateAdded created for the first time)?
I hope that makes sense.
Adam
On Tue, 26 Feb 2019 at 18:24, Tobiah wrote:
On 2/26/19 6:39 AM, AdamC wrote:
Sorry folks - my code didn't work due to my debug var count to ensure
that
I was looping properly.
It should be:
As was pointed out, the problem is not in your code. It's in your
data. You only have one record with a proper 'tpe' value, so that's
all you get in your media list.
Toby
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Re: [Tutor] I flip a coin 1 million times what is the consecutive times it will come up head and come up tails
XD that will help in the future, yes it was not unreadable this one. Abdur-Rahmaan Janhangeer http://www.pythonmembers.club | https://github.com/Abdur-rahmaanJ Mauritius ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] I flip a coin 1 million times what is the consecutive times it will come up head and come up tails
On Tue, Feb 26, 2019 at 01:34:33PM -0700, shaef...@q.com wrote:
> I am learning python. I wanted to test my ability by making a program to
> keep track of the flip of a coin to find how many consecutive times it came
> up heads and tails.
Here's how to count the number of times it comes up heads (1) or tails
(0):
from collections import Counter
from random import randint
c = Counter(randint(0, 1) for i in range(100))
print(c)
Obviously when you do it you will get different results, but here's
mine:
Counter({1: 500481, 0: 499519})
If you want to count how many *consecutive* heads or tails happen, we
can do this:
from itertools import groupby
it = groupby(randint(0, 1) for i in range(100))
c = Counter(len(tuple(x[1])) for x in it)
print(c)
When I run it, I get this:
Counter({1: 250180, 2: 124648, 3: 62760, 4: 31075, 5: 15707, 6: 7998, 7:
3778, 8: 1966, 9: 989, 10: 501, 11: 219, 12: 136, 13: 49, 14: 22, 15:
11, 16: 6, 18: 4, 17: 1})
which tells me that there are 250180 sequences of one head or one tail;
124648 sequences of two heads or two tails; 62760 sequences of three
heads or three tails, and so on to 4 sequences of 18 heads or tails.
If you want to see what is going on a bit better:
it = groupby(randint(0, 1) for i in range(20)) # a bit smaller...
for k, x in it:
t = tuple(x)
print("got", len(t), "consecutive", ("heads" if k==1 else "tails"), t)
which when I ran it gave me:
got 1 consecutive heads (1,)
got 1 consecutive tails (0,)
got 4 consecutive heads (1, 1, 1, 1)
got 3 consecutive tails (0, 0, 0)
got 1 consecutive heads (1,)
got 1 consecutive tails (0,)
got 7 consecutive heads (1, 1, 1, 1, 1, 1, 1)
got 1 consecutive tails (0,)
got 1 consecutive heads (1,)
--
Steven
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Re: [Tutor] Only appending one object to list, when I am expecting more than 1
That's great - bug found. Thanks. However the next question is, how do I create an instance of a class with variable parameters (i.e. with dateAdded already computed and stored, or with dateAdded created for the first time)? I hope that makes sense. Adam On Tue, 26 Feb 2019 at 18:24, Tobiah wrote: > > > On 2/26/19 6:39 AM, AdamC wrote: > > Sorry folks - my code didn't work due to my debug var count to ensure > that > > I was looping properly. > > > > It should be: > > As was pointed out, the problem is not in your code. It's in your > data. You only have one record with a proper 'tpe' value, so that's > all you get in your media list. > > > Toby > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > -- -- You back your data up on the same planet? http://www.monkeez.org PGP key: 0x7111B833 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] I flip a coin 1 million times what is the consecutive times it will come up head and come up tails
On 27/02/2019 09:35, Abdur-Rahmaan Janhangeer wrote: > maybe try dpaste.de or something like that for code pasting ^^_ That can be useful if it's very long code but this is actually quite a short program and it's much easier to reply to if the code is in the message so I think the OP did the right thing in this case. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] I flip a coin 1 million times what is the consecutive times it will come up head and come up tails
maybe try dpaste.de or something like that for code pasting ^^_ Abdur-Rahmaan Janhangeer http://www.pythonmembers.club | https://github.com/Abdur-rahmaanJ Mauritius ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
