python object not iterable error in function

问题

I have a simple function with the following

comdList = range(0,27)
for t, in comdList:
    print t

However it returns a in object not iterable error

outside the function it works fine. Whats going on??

回答1:

Try this:

for t in comdList:
    print t

The extra comma after the t variable was causing the error, because of it Python thinks that the iterable is going to return a sequence of 1-tuples to unpack - for example: ((1,), (2,)) but instead it received an iterable of single elements.

来源：https://stackoverflow.com/questions/17226331/python-object-not-iterable-error-in-function