Python loop index of key, value for-loop when using items()

Question

Im looping though a dictionary using

for key, value in mydict.items():

And I wondered if theres some pythonic way to also access the loop index / iteration number. Access the index while still maintaining access to the key value information.

for key, value, index in mydict.items():

its is because I need to detect the first time the loop runs. So inside I can have something like

if index != 1:

Answer 1

You can use enumerate function, like this

for index, (key, value) in enumerate(mydict.items()):
    print index, key, value

The enumerate function gives the current index of the item and the actual item itself. In this case, the second value is actually a tuple of key and value. So, we explicitly group them as a tuple, during the unpacking.