Is it possible in Python to run multiple counters in a single for loop as in C/C++?
I would want something like -- for i,j in x,range(0,len(x)): I know Python interprets this differently and why, but how would I run two loop counters concurrently in a single for loop?
You want zip in general, which combines two iterators, as @S.Mark says. But in this case enumerate does exactly what you need, which means you don't have to use range directly:
for j, i in enumerate(x):
Note that this gives the index of x first, so I've reversed j, i.
You might want to use zip
for i,j in zip(x,range(0,len(x))):
Example,
>>> x = [1, 2, 3]
>>> y = [4, 5, 6]
>>> zipped = zip(x, y)
>>> print zipped
[(1, 4), (2, 5), (3, 6)]
>>> for a,b in zipped:
... print a,b
...
1 4
2 5
3 6
>>>
Note: The correct answer for this question is enumerate as other mentioned, zip is general option to have multiple items in a single loop
zip is good, but in this particular case, enumerate is the usual way of doing what the original poster wants.for i,j in enumerate(x)
range(0, len(x)) == range(len(x))