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Some issues with your code:

1. Python is case-sensitive. The keyword is class, not Class.

2. After the line class A there has to be a colon: class A:

3. If the function myFunction is supposed to be part of class A, it has to be indented:

   class A:
    def myFunction(a,b)
   

4. Methods of classes should have self as first parameter: def myFunction(self, a, b)

5. After def myFunction(self, a,b) there has to be a colon: def myFunction(self, a,b):

6. Your function must have at least one line of indented code following. If it is supposed to do nothing, you can use the keyword `pass:

   def myFunction(self, a,b):
    pass
   

7. If you want to use sys.argv you first have to import sys at the beginning of your code with import sys.

8. myFunction is part of a class, you first have to instantiate it to use the function:

   Av = A()
   Av.myFunction(a,b)
   

9. The first commandline argument is the second entry of sys.argv, not the first.

However it seems to me that you don't want a class anyway, so just write:

def myFunction(a,b):
 pass
if __name__ == '__main__':
 a = sys.argv[1]
 b = sys.argv[2]
 myFunction(a,b)

Some issues with your code:

1. Python is case-sensitive. The keyword is class, not Class.

2. After the line class A there has to be a colon: class A:

3. If the function myFunction is supposed to be part of class A, it has to be indented:

   class A:
    def myFunction(a,b)
   

4. Methods of classes should have self as first parameter: def myFunction(self, a, b)

5. After def myFunction(self, a,b) there has to be a colon: def myFunction(self, a,b):

6. Your function must have at least one line of indented code following. If it is supposed to do nothing, you can use the keyword `pass:

   def myFunction(self, a,b):
    pass
   

7. If you want to use sys.argv you first have to import sys at the beginning of your code with import sys.

8. myFunction is part of a class, you first have to instantiate it to use the function:

   Av = A()
   Av.myFunction(a,b)
   

9. The first commandline argument is the second entry of sys.argv, not the first.

However it seems to me that you don't want a class anyway, so just write:

def myFunction(a,b):
 pass
if __name__ == '__main__':
 a = sys.argv[1]
 b = sys.argv[2]
 myFunction(a,b)

Also you call python scripts with python file.py arg1 arg2. If you want to omit python at the beginning then you can (in unix-like systems) add a shebang in the first line of the python-file: #!/usr/bin/env python. Then as long as the execution flag is set chmod +x file.py it may be called like ./file.py arg1 arg2.

Some issues with your code:

1. Python is case-sensitive. The keyword is class, not Class.
2. After the line class A there has to be a colon: class A:
3. If the function myFunction is supposed to be part of class A, it has to be intended:

class A: def myFunction(a,b) 4. After

Some issues with your code:

1. Python is case-sensitive. The keyword is class, not Class.

2. After the line class A there has to be a colon: class A:

3. If the function myFunction is supposed to be part of class A, it has to be indented:

   class A:
    def myFunction(a,b)
   

4. Methods of classes should have self as first parameter: def myFunction(self, a, b)

5. After def myFunction(self, a,b) there has to be a colon: def myFunction(self, a,b):

6. Your function must have at least one line of indented code following. If it is supposed to do nothing, you can use the keyword `pass:

   def myFunction(self, a,b):
    pass
   

7. If you want to use sys.argv you first have to import sys at the beginning of your code with import sys.

8. myFunction is part of a class, you first have to instantiate it to use the function:

   Av = A()
   Av.myFunction(a,b)
   

9. The first commandline argument is the second entry of sys.argv, not the first.

However it seems to me that you don't want a class anyway, so just write:

def myFunction(a,b):
 pass
if __name__ == '__main__':
 a = sys.argv[1]
 b = sys.argv[2]
 myFunction(a,b)