dict.fromkeys strange behavior

[Tsviki Hirsh]

Dear list,

I'm trying to create a dictionary from set of keys and values using
dict.fromkeys
When I type:

>>>dict.fromkeys('a',50)

the output is:

{'a': 50}

This is fine, but when I try to set the same value to a different name key:

>>>dict.fromkeys('at',50)

the output now is:

{'a': 50, 't': 50}

This is obviously not what I wanted.

What are the alternatives?

Thanks a lot
Tsviki Hirsh
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