Re: save dictionary for later use?
On May 16, 4:23 pm, Hans Nowak [EMAIL PROTECTED]
wrote:
globalrev wrote:
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
The 'loads' and 'dumps' methods use strings:
import pickle
d = {this: 42, that: 101, other: 17}
s = pickle.dumps(d)
s
(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns.
pickle.loads(s)
{'this': 42, 'other': 17, 'that': 101}
If you want to store to / restore from file, use 'dump' and 'load':
# write to file 'out'...
f = open(out)
f = open(out, wb)
pickle.dump(d, f)
f.close()
# restore it later
g = open(out, rb)
e = pickle.load(g)
g.close()
e
{'this': 42, 'other': 17, 'that': 101}
Also seehttp://docs.python.org/lib/pickle-example.html.
Hope this helps!
--Hans
I want to compare that cleanliness with other languages to compare
formats.
Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
pickle.load( 'out', 'rb' )?
--
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Re: save dictionary for later use?
On May 17, 3:52 am, castironpi [EMAIL PROTECTED] wrote:
On May 16, 4:23 pm, Hans Nowak [EMAIL PROTECTED]
wrote:
globalrev wrote:
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
The 'loads' and 'dumps' methods use strings:
import pickle
d = {this: 42, that: 101, other: 17}
s = pickle.dumps(d)
s
(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns.
pickle.loads(s)
{'this': 42, 'other': 17, 'that': 101}
If you want to store to / restore from file, use 'dump' and 'load':
# write to file 'out'...
f = open(out)
f = open(out, wb)
pickle.dump(d, f)
f.close()
# restore it later
g = open(out, rb)
e = pickle.load(g)
g.close()
e
{'this': 42, 'other': 17, 'that': 101}
Also seehttp://docs.python.org/lib/pickle-example.html.
Hope this helps!
--Hans
I want to compare that cleanliness with other languages to compare
formats.
Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
pickle.load( 'out', 'rb' )?- Hide quoted text -
- Show quoted text -
This is a check-in on live-time writing. pickle.load didn't take two
parameters.
--
http://mail.python.org/mailman/listinfo/python-list
save dictionary for later use?
i extract info from one file and put it into a dictionary. i want to save that dictionary for later use, how do i do that? might save a list of dictionaries or a list of classobjects too if there is any difference. -- http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote: i extract info from one file and put it into a dictionary. i want to save that dictionary for later use, how do i do that? might save a list of dictionaries or a list of classobjects too if there is any difference. use the 'pickle' module. http://docs.python.org/lib/module-pickle.html ... Jay Graves -- http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On 16 Maj, 21:22, jay graves [EMAIL PROTECTED] wrote: On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote: i extract info from one file and put it into a dictionary. i want to save that dictionary for later use, how do i do that? might save a list of dictionaries or a list of classobjects too if there is any difference. use the 'pickle' module.http://docs.python.org/lib/module-pickle.html ... Jay Graves pickle.dumps(mg) pickle.load(mg) 'dict' object has no attribute 'readline' dumps load(well i dont know but i get no complaint but running load generates that error) -- http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On May 16, 3:24 pm, globalrev [EMAIL PROTECTED] wrote:
On 16 Maj, 21:22, jay graves [EMAIL PROTECTED] wrote:
On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote:
i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.
use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
It's best to post a minimal set of code that exhibits your error.
You aren't saving the output of pickle.dumps and you are using
pickle.load instead of pickle.loads.
Sample loading to and from a string which you can tuck away in a file.
import pickle
test = {'a':1,'b':2}
picklestr = pickle.dumps(test)
test2 = pickle.loads(picklestr)
test == test2
True
Sample using an open file.
import pickle
test = {'a':1,'b':2}
pfile = open('pickletest','wb')
pickle.dump(test,pfile)
pfile.close()
pfile = open('pickletest','rb')
test2 = pickle.load(pfile)
pfile.close()
test == test2
True
...
Jay Graves
--
http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
globalrev wrote:
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
The 'loads' and 'dumps' methods use strings:
import pickle
d = {this: 42, that: 101, other: 17}
s = pickle.dumps(d)
s
(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns.
pickle.loads(s)
{'this': 42, 'other': 17, 'that': 101}
If you want to store to / restore from file, use 'dump' and 'load':
# write to file 'out'...
f = open(out)
f = open(out, wb)
pickle.dump(d, f)
f.close()
# restore it later
g = open(out, rb)
e = pickle.load(g)
g.close()
e
{'this': 42, 'other': 17, 'that': 101}
Also see http://docs.python.org/lib/pickle-example.html.
Hope this helps!
--Hans
--
http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On 16 mai, 22:24, globalrev [EMAIL PROTECTED] wrote:
On 16 Maj, 21:22, jay graves [EMAIL PROTECTED] wrote:
On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote:
i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.
use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
...
Jay Graves
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
What about *READING THAT FUCKING MANUAL* ?
http://docs.python.org/lib/node316.html
dump(obj, file[, protocol])
Write a pickled representation of obj to the open file object
file. This is equivalent to Pickler(file, protocol).dump(obj).
If the protocol parameter is omitted, protocol 0 is used. If
protocol is specified as a negative value or HIGHEST_PROTOCOL, the
highest protocol version will be used.
Changed in version 2.3: Introduced the protocol parameter.
file must have a write() method that accepts a single string
argument. It can thus be a file object opened for writing, a StringIO
object, or any other custom object that meets this interface.
load(file)
Read a string from the open file object file and interpret it as a
pickle data stream, reconstructing and returning the original object
hierarchy. This is equivalent to Unpickler(file).load().
file must have two methods, a read() method that takes an integer
argument, and a readline() method that requires no arguments. Both
methods should return a string. Thus file can be a file object opened
for reading, a StringIO object, or any other custom object that meets
this interface.
This function automatically determines whether the data stream was
written in binary mode or not.
Example use:
d = dict(a=1, b=2)
f = open(mydict.dat, w)
pickle.dump(d, f)
f.close()
f = open(mydict.dat)
d2 = pickle.load(f)
f.close()
d2 == d
True
d2
{'a': 1, 'b': 2}
Now : it's not the first time - in a couple days - that you ask a
question that you wouldn't have asked if you had taken a couple
minutes doing the tutorial and/or reading the doc. This newsgroup is
*very* tolerant (in most other places on usenet, you would have get a
raw RTFM on the first question, and a PLONK on the second), but there
are still limits, and as far as I'm concerned you're not far from
them. So do yourself and the world a favour, read this:
http://catb.org/~esr/faqs/smart-questions.html
and then this:
http://docs.python.org/tut/tut.html
and next time someone points you to a specific module, have mercy and
*read* the doc before posting.
As far as I'm concerned, I won't anwser any of your questions unless
it's obvious that you have followed these advices (but then I'll be
happy to help if I can).
--
http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On May 16, 4:29 pm, [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
On 16 mai, 22:24, globalrev [EMAIL PROTECTED] wrote:
On 16 Maj, 21:22, jay graves [EMAIL PROTECTED] wrote:
On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote:
i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.
use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
...
Jay Graves
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
What about *READING THAT FUCKING MANUAL* ?
http://docs.python.org/lib/node316.html
dump(obj, file[, protocol])
Write a pickled representation of obj to the open file object
file. This is equivalent to Pickler(file, protocol).dump(obj).
If the protocol parameter is omitted, protocol 0 is used. If
protocol is specified as a negative value or HIGHEST_PROTOCOL, the
highest protocol version will be used.
Changed in version 2.3: Introduced the protocol parameter.
file must have a write() method that accepts a single string
argument. It can thus be a file object opened for writing, a StringIO
object, or any other custom object that meets this interface.
load(file)
Read a string from the open file object file and interpret it as a
pickle data stream, reconstructing and returning the original object
hierarchy. This is equivalent to Unpickler(file).load().
file must have two methods, a read() method that takes an integer
argument, and a readline() method that requires no arguments. Both
methods should return a string. Thus file can be a file object opened
for reading, a StringIO object, or any other custom object that meets
this interface.
This function automatically determines whether the data stream was
written in binary mode or not.
Example use:
d = dict(a=1, b=2)
f = open(mydict.dat, w)
pickle.dump(d, f)
f.close()
f = open(mydict.dat)
d2 = pickle.load(f)
f.close()
d2 == d
True
d2
{'a': 1, 'b': 2}
Now : it's not the first time - in a couple days - that you ask a
question that you wouldn't have asked if you had taken a couple
minutes doing the tutorial and/or reading the doc. This newsgroup is
*very* tolerant (in most other places on usenet, you would have get a
raw RTFM on the first question, and a PLONK on the second), but there
are still limits, and as far as I'm concerned you're not far from
them. So do yourself and the world a favour, read
this:http://catb.org/~esr/faqs/smart-questions.html
and then this:http://docs.python.org/tut/tut.html
and next time someone points you to a specific module, have mercy and
*read* the doc before posting.
As far as I'm concerned, I won't anwser any of your questions unless
it's obvious that you have followed these advices (but then I'll be
happy to help if I can).- Hide quoted text -
- Show quoted text -
There is 'shelve'. It's just that you have to re-update each entry
when you modify, so it's just similarity you'd be saving.
--
http://mail.python.org/mailman/listinfo/python-list
Re: save dictionary for later use?
On May 16, 5:19 pm, castironpi [EMAIL PROTECTED] wrote:
On May 16, 4:29 pm, [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
On 16 mai, 22:24, globalrev [EMAIL PROTECTED] wrote:
On 16 Maj, 21:22, jay graves [EMAIL PROTECTED] wrote:
On May 16, 2:17 pm, globalrev [EMAIL PROTECTED] wrote:
i extract info from one file and put it into a dictionary.
i want to save that dictionary for later use, how do i do that?
might save a list of dictionaries or a list of classobjects too if
there is any difference.
use the 'pickle' module.http://docs.python.org/lib/module-pickle.html
...
Jay Graves
pickle.dumps(mg)
pickle.load(mg)
'dict' object has no attribute 'readline'
dumps load(well i dont know but i get no complaint but running load
generates that error)
What about *READING THAT FUCKING MANUAL* ?
http://docs.python.org/lib/node316.html
dump(obj, file[, protocol])
Write a pickled representation of obj to the open file object
file. This is equivalent to Pickler(file, protocol).dump(obj).
If the protocol parameter is omitted, protocol 0 is used. If
protocol is specified as a negative value or HIGHEST_PROTOCOL, the
highest protocol version will be used.
Changed in version 2.3: Introduced the protocol parameter.
file must have a write() method that accepts a single string
argument. It can thus be a file object opened for writing, a StringIO
object, or any other custom object that meets this interface.
load(file)
Read a string from the open file object file and interpret it as a
pickle data stream, reconstructing and returning the original object
hierarchy. This is equivalent to Unpickler(file).load().
file must have two methods, a read() method that takes an integer
argument, and a readline() method that requires no arguments. Both
methods should return a string. Thus file can be a file object opened
for reading, a StringIO object, or any other custom object that meets
this interface.
This function automatically determines whether the data stream was
written in binary mode or not.
Example use:
d = dict(a=1, b=2)
f = open(mydict.dat, w)
pickle.dump(d, f)
f.close()
f = open(mydict.dat)
d2 = pickle.load(f)
f.close()
d2 == d
True
d2
{'a': 1, 'b': 2}
Now : it's not the first time - in a couple days - that you ask a
question that you wouldn't have asked if you had taken a couple
minutes doing the tutorial and/or reading the doc. This newsgroup is
*very* tolerant (in most other places on usenet, you would have get a
raw RTFM on the first question, and a PLONK on the second), but there
are still limits, and as far as I'm concerned you're not far from
them. So do yourself and the world a favour, read
this:http://catb.org/~esr/faqs/smart-questions.html
and then this:http://docs.python.org/tut/tut.html
and next time someone points you to a specific module, have mercy and
*read* the doc before posting.
As far as I'm concerned, I won't anwser any of your questions unless
it's obvious that you have followed these advices (but then I'll be
happy to help if I can).- Hide quoted text -
- Show quoted text -
There is 'shelve'. It's just that you have to re-update each entry
when you modify, so it's just similarity you'd be saving.- Hide quoted text -
- Show quoted text -
Now a shelf of filenames could be valuable.
--
http://mail.python.org/mailman/listinfo/python-list
