Python error

def calendar(days):
    "Prints each day of the week."
    return days()
if __name__ == "__main__":
        daysofweek = ('Sunday', 'Monday', 'Tuesday', \
                      'Wednesday', 'Thursday', 'Friday', \
                      'Saturday')
        print calendar(daysofweek)


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TypeError: 'tuple' object is not callable

The error is that you are fundamentally incapable of reading