Clearing pythonwin environment

[Network Ninja]

I want to restart the environment occasionally to default (like I
restarted pythonwin). I wrote this script. I know why it doesn't work,
cause it deletes my variable (item) on each iteration. My question is:
is it possible to do this? What other things might I try?

# Reset Pythonwin enviroment

# Variables
keep = ['__builtins__', '__doc__', '__name__', 'pywin', 'keep', 'item']

print
for item in dir():
if item not in keep:
del item

print
print dir()

[Steven Bethard]

Re: Clearing pythonwin environment

Network Ninja wrote:[color=blue]
> I want to restart the environment occasionally to default (like I
> restarted pythonwin). I wrote this script. I know why it doesn't work,
> cause it deletes my variable (item) on each iteration. My question is:
> is it possible to do this? What other things might I try?
>
> # Reset Pythonwin enviroment
>
> # Variables
> keep = ['__builtins__', '__doc__', '__name__', 'pywin', 'keep', 'item']
>
> print
> for item in dir():
> if item not in keep:
> del item[/color]
^^^^^^^^
del globals()[item]

I believe that should work.

Note that this won't cause imported modules to be reloaded though, so I
wouldn't rely on it too heavily. The imported modules problem can only
really be solved by restarting the interpreter.

STeVe

[Scott David Daniels]

Re: Clearing pythonwin environment

Network Ninja wrote:[color=blue]
> I want to restart the environment occasionally to default (like I
> restarted pythonwin). I wrote this script. I know why it doesn't work,
> cause it deletes my variable (item) on each iteration. My question is:
> is it possible to do this? What other things might I try?
>
> keep = ['__builtins__', '__doc__', '__name__', 'pywin', 'keep', 'item']
> for item in dir():
> if item not in keep:
> del item[/color]

keep = set(['__builtins__', '__doc__', '__name__',
'pywin', 'keep', 'item', 'globs']) # Faster to test
globs = globals()
for item in dir():
if item not in keep:
del globs[item]
del globs, item

Note that this leaves all imported modules imported.

--Scott David Daniels
scott.daniels@a cm.org

[Network Ninja]

Re: Clearing pythonwin environment


Scott David Daniels wrote:[color=blue]
> keep = set(['__builtins__', '__doc__', '__name__',
> 'pywin', 'keep', 'item', 'globs']) # Faster to test
> globs = globals()
> for item in dir():
> if item not in keep:
> del globs[item]
> del globs, item[/color]

This did not work, it gave an error saying "NameError: name 'globs' is
not defined".

However, Steven's del globals()[item] did the trick perfectly. Thanks a
million for the replies, both of you.

So can you explain the [] after globals()? How does that work? The help
docs don't mention anything about that in the function.

[Scott David Daniels]

Re: Clearing pythonwin environment

Network Ninja wrote:[color=blue]
> Scott David Daniels wrote:[color=green]
>> keep = set(['__builtins__', '__doc__', '__name__',
>> 'pywin', 'keep', 'item', 'globs']) # Faster to test
>> globs = globals()
>> for item in dir():
>> if item not in keep:
>> del globs[item]
>> del globs, item[/color]
>
> This did not work, it gave an error saying "NameError: name 'globs' is
> not defined".[/color]

I suspect that was because you did not include the last entry in the
"keep" set above.

By the way, another way to clean up:

def cleanup(keep=se t(['__builtins__', '__doc__', '__name__',
'pywin', 'cleanup']):
globs = globals()
for item in set(globs) - keep:
del globs[item]

Then, simply call:

cleanup()
[color=blue]
> So can you explain the [] after globals()? How does that work?[/color]
globals() returns a dict (or dict-like object) that reflects and
access the current global environment. Imagine:

globs = dict(a=1, b='2', c='iii')
print globs
del globs['b']
print globs


--Scott David Daniels
scott.daniels@a cm.org