Thanks max,
Now it's much clearer. I made the following experiment
#1
D={'a':1, 'b':2}
D
{'a': 1, 'b': 2}
E=D.copy()
E
{'a': 1, 'b': 2}
D['a']=3
D
{'a': 3, 'b': 2}
E
{'a': 1, 'b': 2}
#2
D={'a':[1,3], 'b':[2,4]}
D
{'a': [1, 3], 'b': [2, 4]}
E=D.copy()
E
{'a': [1, 3], 'b': [2, 4]}
Entering the following in the Python shell yields
help(dict.copy)
Help on method_descriptor:
copy(...)
D.copy() - a shallow copy of D
Ok, I thought a dictionary copy is a shallow copy. Not knowing exactly
what that meant I went to http://en.wikipedia.org/wiki/Deep_copy where
I could read
Alex [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
D={'Python': 'good', 'Basic': 'simple'}
E=D.copy()
E
{'Python': 'good', 'Basic': 'simple'}
D['Basic']='oh my'
D
{'Python': 'good', 'Basic': 'oh my'}
E
{'Python': 'good', 'Basic': 'simple'}
Hmm, this looks like a deep copy to
