basic question, sorry

[s_gherman at yahoo.com]

Hi, I'm a Python beginner.

I need to build a dictionary {} which maps strings to lists.
Let's say I need to map incrementally:
dict['one'] = ['1']
dict['one'].append('I')
etc

How can I check that dict[n] exists or not already?

I tried:
1) if not dict[n]
2) if dict[n] == None

Thanks in advance,
Sorin Gherman


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