Mar 19, 2014 · The Python approach to "main" is almost unique to the language (*). The semantics are a bit subtle. The __name__ identifier is bound to the name of any module as it's being imported. However, when a file is being executed then __name__ is set to "__main__" (the literal string: __main__). This is almost always used to separate the portion of code which should be executed from the portions of ...

Jan 7, 2009 · For questions where someone simply hasn't called any functions, or incorrectly expects a function named main to be used as an entry point automatically, use Why doesn't the main () function run when I start a Python script? Where does the script start running?.

Oct 28, 2010 · Why does python not support a professional main () function which is automatically executed by python code.py?

Oct 28, 2010 · Often, a Python program is run by naming a .py file on the command line: $ python my_program.py You can also create a directory or zipfile full of code, and include a __main__.py. Then you can simply name the directory or zipfile on the command line, and it executes the __main__.py automatically: $ python my_program_dir $ python my_program.zip # Or, if the program is accessible as a module ...

In my case it turned out that a Python 2 interpreter was trying to run Python 3 code, or vice versa; I think that my shell had a PYTHONPATH with a mixture of Python 2 and Python 3.

Then navigate to the script containing directory and type python test.py. If you're on mac or linux, then open terminal, navigate to the script containing directory and type in python test.py.

From terminal: File "index.py", line 41 def main(): ^ SyntaxError: invalid syntax From App Engine dev server. I'm running 2.7.3rc2 on Debian: msg = 'invalid syntax' offset = 3

Jun 17, 2011 · What does the “at” (@) symbol do in Python? @ symbol is a syntactic sugar python provides to utilize decorator, to paraphrase the question, It's exactly about what does decorator do in Python? Put it simple decorator allow you to modify a given function's definition without touch its innermost (it's closure).

I'm trying to make a climate control in Python via Raspberry Pi, but I'm getting an error: traceback (most recent call last): if__name__=='__main__': syntaxerror: invalid syntax

Jan 15, 2017 · In the example provided, (i) there's a space missing after if, and (ii) the symbol's name should have two pairs of underscores: __name__. If these two corrections resolve your problem, great. But in case you still have another more mysterious unresolved syntax error, then …