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@PythonPr Colon is missin in the function. But I can see a space in its name in both: it's not permitted...
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@PythonPr As others have pointed out. The first is the function name its self. Either addNumbers or add_numbers and the colon for the function.
Function names cannot have spaces in them because it confuses the compiler because it doesn't understand and sees it as 2 variable names
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