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python-2.7enumerate

Enumeration from 1

Is it possible to start counting number of iterations from 1 using enumerate function? If not, how to do it efficient way? There's particular piece of code I'm working with:

for nr, month in enumerate(range(1, 13)):
    print "Month: ", nr

I need to enumerate months from 1 to 12.

Solution

  • Yes, simply tell enumerate() where to start; it takes a second argument for that:

    for nr, month in enumerate(range(1, 13), 1):

    From the enumerate() documentation:

    enumerate(sequence, start=0)
    [...] The next() method of the iterator returned by enumerate() returns a tuple containing a count (from start which defaults to 0) and the values obtained from iterating over sequence

    Bold emphasis mine.

    Not that you really need it here, you are producing a range of numbers already, you can simply re-use month in this case as nr and month will always be equal now.