how to achive - file write open on __del__?

Question

I m trying to do a some activity on class obj destruction. How do I achive file open in _del__ function? (I m using Python 3.4)

class iam(object):

    def __in         


        

Answer 1

The problem is, as MuSheng tried to explain, that the __builtins__ are removed before your __del__ is called.

You can trigger the __del__ yourself by assigning None to the variable.

MuSheng's code could be this:

class iam():
    def __init__(self):
        print("I m born")

    def __del__(self):
        #"open" function still in __builtins__ 
        with open("memory_report.txt", "w") as f:
            f.write("He gone safe")

if __name__ == '__main__':
    i = iam()
    i = None # This triggers `__del__`
    print("Script Ends. Now to GC clean memory")

MuSheng deserves some upvotes, IMO