On 6/3/2009 12:50 AM spir said...
Le Tue, 02 Jun 2009 10:47:38 -0700,
Emile van Sebille <em...@fenx.com> s'exprima ainsi:
On 6/2/2009 8:54 AM roberto said...
hello,
i'd like to ask if there is anything in python which helps to see what
variables have been defined and their type and their dimension etc;
In appropriate contexts, you may be able to use a variant of:
from pprint import pprint
pprint (locals())
By the way, it take the opportunity to ask about the difference between vars()
& locals().
Well, start in the interpreter...
--------------
>>> help (vars)
Help on built-in function vars in module __builtin__:
vars(...)
vars([object]) -> dictionary
Without arguments, equivalent to locals().
With an argument, equivalent to object.__dict__.
>>> help (locals)
Help on built-in function locals in module __builtin__:
locals(...)
locals() -> dictionary
Update and return a dictionary containing the current scope's local
variables.
--------------
So, vars() is locals(), while vars(localvar) returns information about
localvar. In practice, you might do:
(taken from a zope project I did a few years back)
--------------registrant.py--------------
"""A Registrant type that has an editable schema"""
__author__ = 'Aaron VanDerlip aa...@netcorps.org'
__docformat__ = 'plaintext'
import pdb;pdb.set_trace()
from AccessControl import ClassSecurityInfo
--------------snip balance--------------
Then when run:
--------------
> c:\...\registrant.py(8)?()
-> from AccessControl import ClassSecurityInfo
(Pdb) import pprint
(Pdb) pprint.pprint(vars())
{'__author__': 'Aaron VanDerlip aa...@netcorps.org',
'__builtins__': <module '__builtin__' (built-in)>,
'__doc__': 'A Registrant type that has an editable schema',
'__docformat__': 'plaintext',
'__file__': 'C:\\...\\registrant.py',
'__name__': '__main__',
'pdb': <module 'pdb' from 'C:\Python24\lib\pdb.pyc'>,
'pprint': <module 'pprint' from 'C:\Python24\lib\pprint.pyc'>}
(Pdb) pprint.pprint(locals())
{'__author__': 'Aaron VanDerlip aa...@netcorps.org',
'__builtins__': <module '__builtin__' (built-in)>,
'__doc__': 'A Registrant type that has an editable schema',
'__docformat__': 'plaintext',
'__file__': 'C:\\...\\registrant.py',
'__name__': '__main__',
'pdb': <module 'pdb' from 'C:\Python24\lib\pdb.pyc'>,
'pprint': <module 'pprint' from 'C:\Python24\lib\pprint.pyc'>}
--------------
So, vars() and local() are the same. Now a look at vars(pdb)
--------------
(Pdb) pprint.pprint(vars(pdb))
{'Pdb': <class pdb.Pdb at 0x00FFAE40>,
'Repr': <class repr.Repr at 0x00FFA900>,
'TESTCMD': 'import x; x.main()',
'__all__': ['run',
'pm',
'Pdb',
'runeval',
'runctx',
'runcall',
'set_trace',
'post_mortem',
'help'],
<snip balance>
Emile
Denis
------
la vita e estrany
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