What minimum should a person know before saying "I know Python"

[Aseem Bansal]

By C being smaller than Python I did not mean the scope of C is lesser than Python. I simply meant that the standard libraries are less in number compared to Python.

By knowing Python I didn't imply an expert-level understanding. Minimum that so someone cannot say "Hey, you said you knew Python but you don't know anything.". Something on these lines. You can say for cracking interviews and/or as a junior programmar and/or as a fresher getting into industry.

I like to have test cases for my functions/scripts but that wasn't what I had in my mind.

Also I am learning Python because it is faster to make things with it. Not because it is going to get me any marks or anything.

@Tim Chase
That list helped. I was looking for something like that. Questions which I can try to answer and see where I stand.

I hope that cleared some confusion about what I wanted to ask. I wanted to gauge myself to find if I am progressing or not.