Bob Smith wrote:
Hi,
I have a Python list. I can't figure out how to find an element's numeric value (0,1,2,3...) in the list. Here's an example of what I'm doing:
Use enumerate() (new in Python 2.3, IIRC). Otherwise:
for i in range(len(sequence)): item = sequence[i] ...
for bar in bars: if 'str_1' in bar and 'str_2' in bar: print bar
This finds the right bar, but not its list position. The reason I need to find its value is so I can remove every element in the list before it so that the bar I found somewhere in the list becomes element 0... does that make sense?
Sure. You want to slice the list starting at the index of the first occurrence:
index = min([i for i, item in enumerate(sequence) if 'str_1' in item and 'str_2' in item])
print sequence[index:]
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