how to copy a dictionary in python 3.1 and edit ONLY the copy

Posted by MadSc13ntist on Stack Overflow See other posts from Stack Overflow or by MadSc13ntist
Published on 2010-03-17T21:07:06Z Indexed on 2010/03/17 21:11 UTC
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dictionary

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python

can someone please explain this to me??? this doesn't make any sense to me.... I copy a dictionary into another and edit the second and both are changed????

ActivePython 3.1.0.1 (ActiveState Software Inc.) based on
Python 3.1 (r31:73572, Jun 28 2009, 19:55:39) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> dict1 = {"key1":"value1", "key2":"value2"}
>>> dict2 = dict1
>>> dict2
{'key2': 'value2', 'key1': 'value1'}
>>> dict2["key2"] = "WHY?!?!?!!?!?!?!"
>>> dict1
{'key2': 'WHY?!?!?!!?!?!?!', 'key1': 'value1'}
>>>

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