[ python-Bugs-1500167 ] interpret termination, object deleting

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Bugs item #1500167, was opened at 2006-06-03 20:55
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Jan Martinek (johnymart)
Assigned to: Nobody/Anonymous (nobody)
Summary: interpret termination, object deleting

Initial Comment:
Hello,

I found out a strange behavior. This code

#!/usr/bin/python
class M:
  b = 0
  def __del__(self):
    M.b = 0

a1 = M()

results in exception when the program terminates.

Exception exceptions.AttributeError: "'NoneType' object
has no attribute 'b'" in <bound method M.__del__ of
<__main__.M instance at 0x2aaaaab50a28>> ignored

Note that the code must be run from an executable file
-not from the python interpretter. Otherwise the
exception is not thrown.

An interesting thing is that changing the last line to

a = M()

also prevents python from throwing the exception. Why
does it depend on variable's name?

bye
Jan Martinek

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You can respond by visiting: 
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