How To Clean Memory
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How To Clean Memory Space
N/A wrote:Hi all,
I am learning Python. Just wondering how to clear saved memory in
Python? Like in Matlab I can simply use 'clear all' to clear all saved
memory.
You don't - python does it for you. It is called garbage collection. All you
have to to is get into granny-mode(tm): forget about things. That means:
once an object is not referenced by your code anymore, it will be cleaned
up.
I think Matlab's 'clear all' is more like what you might call 'del all'
in python.
You could perhaps define it like this:
def clearall():
all = [var for var in globals() if var[0] != '_']
for var in all:
del globals()[var]
This deletes any global not starting with an _, since it's probably
inadvisable to delete this lot:
{'__builtins__': <module '__builtin__' (built-in)>, '__file__':
'/etc/pythonstart', '__name__': '__main__', '__doc__': None}
More correct I suppose might be something like this:
def clearall():
all = [var for var in globals() if '__' not in (var[:2], var[-2:])]
for var in all:
del globals()[var]
since I think magic things always start and end with __.
Looking briefly at GNU octave which is similar to MatLab, clear all may
also del all the locals; so you can do something similar with the
builtin function locals().