pythonindentation

"NameError: name 'main' is not defined."

import sys

def Cat(filename):

    f = open(filename,'rU')
    text = f.read()
    print ("text")
    f.close()

    def main():
        Cat(sys.argv[1])  

if __name__ == '__main__':
    main()

I keep getting the following error shown below:

NameError: name 'main' is not defined.
Solution

  • main is not indented properly. It should have no indentation. Now it is only accessible from Cat.

    import sys

def Cat(filename):

    f = open(filename,'rU')
    text = f.read()
    print ("text")
    f.close()

def main():
    Cat(sys.argv[1])  

if __name__ == '__main__':
    main()