Question

Is it necessary that the two or more keys in a dictionary in python can't have duplicate values. . ??
is this allowed:
dict={'a':1,'b':2,'a':5}

Answer 1

it will not throw an exception but, dict['a'] will return 5. After running dict={'a':1,'b':2,'a':3},
dict ={'a':3,'b':2}.

Answer 2

It's a random process. .
if u do dict['a']
u can either get the output as 1 or 3. . Alrt
So u mean to say we can have duplicate keys for different values

Answer 3

I beleive that the 'a':3 part of the initialization just sets 'a' to 3. This is what I got typing in Idle.
>>> d={'a':1,'b':2,'a':3}
>>> d
{'a': 3, 'b': 2}

Answer 4

ohk thank u :)