Understanding the main method of python - Stack Overflow
Mar 19, 2014 · The if statement allows you to create a main function which will be executed if your file is loaded as the "Main" module rather than as a library in another module. To be clear, this means that the Python interpreter starts at the first line of a file and executes it.
python - What does if __name__ == "__main__": do? - Stack Overflow
Jan 7, 2009 · # What gets printed if foo is the main program before import before function_a before function_b before __name__ guard Function A Function B 10.0 after __name__ guard # What gets printed if foo is imported as a regular module before import before function_a before function_b before __name__ guard after __name__ guard
python - Why use def main()? - Stack Overflow
Oct 28, 2010 · Reasons to have that if statement calling main() (in no particular order): Other languages (like C and Java) have a main() function that is called when the program is executed. Using this if, we can make Python behave like them, which feels more familiar for many people. Code will be cleaner, easier to read, and better organized. (yeah, I know ...
Should I use a main() method in a simple Python script?
I always write a main() function (appropriately named), and put nothing but command-line parsing and a call to main() in the if __name__ == '__main__' block. That's because no matter how silly, trivial, or single-purpose I originally expect that script to be, I always end up wanting to call it from another module at some later date.
python - What is __main__.py? - Stack Overflow
Oct 28, 2010 · Executing from directory a and assuming script a/b/c/__main__.py... python -m b.c will execute from the directory a and the main script's imports will be relative to a. But python b/c will execute from the import scope of dir c and so any imports like in …
Best practice for Python main function definition and program …
Nov 2, 2020 · def main(cli_args: List[str] = None) -> int: """ `cli_args` makes it possible to call this function command-line-style from other Python code without touching sys.argv. """ try: # Parsing with `argparse` and additional processing # is usually lenghty enough to …
Is it bad practice to have arguments called in main() in Python
Nov 8, 2018 · You create something outside of main and want to pass it through to main. And this can happen in two instances: You're calling main multiple times from other functions. You've created variables outside main that you want to pass through. Point number 1 is definitely bad practice. main should be unique and called only once at the beginning of ...
Why doesn't the main() function run? (What is a Python script's …
Python isn't like other languages where it automatically calls the main() function. All you have done is defined your function. You have to manually call your main function: main() Also, you may commonly see this in some code: if __name__ == '__main__': main()
Python: How can I use variable from main file in module?
from main import var def func(): print var This will copy a reference to the original name to the importing module. import main def func(): print main.var This will let you use the variable from the other module, and allow you to change it if desired.
Python main function in class - Stack Overflow
I'm new to python and the main() method and class def's are confusing me. I'm trying to create a bloom filter and my program keeps terminating because I don't think I'm calling things correctly.