New submission from Kevin Young <kings...@gmail.com>:
Test code:
class Test(object):
def __init__(self, a={}):
self._a = a
def put(self, k, v):
self._a[k] = v
if __name__ == '__main__':
t1 = Test()
t1.put('aa', '11')
t1.put('bb', '22')
t2 = Test()
t2.put('cc', '33')
for k, v in t2._a.items():
print(k, '=', v)
Output:
aa = 11
bb = 22
cc = 33
The expected output should be:
cc = 33
My workaround:
self._a = dict(a)
I have tested on both Python 3.7.3 and 3.8.1, they share the same results.
I'm not sure if this is a bug or on-purpose feature of python. Could someone
provide some guidance for me? Thank you.
----------
components: Interpreter Core
messages: 361407
nosy: Kevin Young
priority: normal
severity: normal
status: open
title: Different objects of the same class references the same dictionary
versions: Python 3.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39556>
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