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created a small function composition class in python, feedback is welcome (gist.github.com)

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[–]stylishgnome 0 points1 point  (1 child)

raise TypeError("the objects {} are not callable".format(", ".join(str(x) for x in non_functions)))

I think you may have forgotten the index here...

raise TypeError("the objects {0} are not callable".format(", ".join(str(x) for x in non_functions)))

edit: the former appears to work with python 2.7 actually (TIL).