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. 6 4584
On May 16, 2:17 pm, globalrev <skanem...@yahoo.sewrote:
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
On 16 Maj, 21:22, jay graves <jaywgra...@gmail.comwrote:
On May 16, 2:17 pm, globalrev <skanem...@yahoo.sewrote:
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)
On May 16, 3:24 pm, globalrev <skanem...@yahoo.sewrote:
On 16 Maj, 21:22, jay graves <jaywgra...@gmail.comwrote:
On May 16, 2:17 pm, globalrev <skanem...@yahoo.sewrote:
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
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'th at'\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
On May 16, 4:23*pm, Hans Nowak <zephyrfalcon!NO_SP...@gmail.com>
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'th at'\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' )?
On May 17, 3:52*am, castironpi <castiro...@gmail.comwrote:
On May 16, 4:23*pm, Hans Nowak <zephyrfalcon!NO_SP...@gmail.com>
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'th at'\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
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