7
In some languages, as in C, we have the function main()
which is usually the default entry point of the program. There is something similar in Python?
7
In some languages, as in C, we have the function main()
which is usually the default entry point of the program. There is something similar in Python?
8
There is no function main()
in Python, at least not explicitly. What we have is '__main__'
which is the name of the scope of the code executed in top-level, and is defined in __name__
the name of the module. O '__main__'
is defined when the script is executed from the interactive terminal or called by the language interpreter.
You can get a "similar behavior" with the main()
as follows:
if __name__ == '__main__':
main()
This will prevent script content from running when imported:
import meuscript
So whatever’s on the block if
will not run on import unless you do:
from meuscript import main
main()
and call the function main()
directly.
See on documentation.
6
There is no python function main()
as in C. However there is a native variable called __name__
(with two underlines before and after).
In python we have modules that can be executed indepedente or imported in another script. With the variable __name__
it is possible to know if the script is running through an import or directly.
If the script is running through an import, then the variable __name__
takes the name of the imported module. Now if the script is running directly, for example with the command python script.py
, then the variable __name__
receives the amount __main__
.
More detailed information on this link: https://blog.alura.com.br/o-que-significa-if-name-main-no-python/
5
Python is a language of script then it already begins to exist. In a certain way it exists, but not in the same way as C. It does not formally exist, the code that is found that is not inside a function is taken as a global function, the default input is the script that you have executed, from there it goes executing.
0
Speaking of application entry point, Python does not define a function for this.
The programs are interpreted from top to bottom, as is common in scripting languages. 3
Behold: https://stackoverflow.com/questions/36794098/designing-a-program-entry-point-in-python
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