In Python 2.7 and Python 3.2, the default warning filters were updated to hide DeprecationWarning by default, such that deprecation warnings in development tools that were themselves written in Python (e.g. Press question mark to learn the rest of the keyboard shortcuts . Allgemeine Fragen. In importingScript.py the __name__ variable is set to __main__. Lets dig a bit more deeper.
However, it may seem confusing at times. Log in sign up. - jetzt Python programmieren lernen Sie befinden sich: Startseite » Hauptprogramm __main__ Im letzten Kapitel haben wir die Möglichkeit kennen gelernt, Code aus einer anderen Datei zu importieren und somit die dort vorhandenen Funktionen nutzen zu können. The __name__ variable and Python Module To understand the importance of __name__ variable, consider the following code:
So, what is going on here? If you follow this article step-by-step and read its code snippets, you will learn how to use if __name__ == "__main__", and why it's so important. apply, map und applymap. The Overflow Blog Nobody has to lose in work/life balance Abstract. I see a lot of well detailed answers here, but I’ll try to simplify it and give you the take away of when and when not to use it: There are only two cases: either you want to use it as a script or as a module. Using the if __name__ == “__main__” statement is quite regular in Python files. But this time it is set to nameScript. This will call the function main() and when main finishes, it will exit giving the system the return code that is … It will output a string ‘__main__’.
Python Programmierforen. Whenever Python runs a file, it sets up a few special variables and ‘__name__’ is one of those. Seit 2002 Diskussionen rund um die Programmiersprache Python. Перед тем, как начать выполнять команды, он определяет несколько специальных переменных. Die Konstruktion if __name__ == ”__main__” wird eingesetzt um eine Python Datei als eigenständiges Programm zu nutzen und einzelne Elemente dieser Datei importierbar zu machen. #this will always be executed even if this module is simply imported by other file or this module is the entry point print "I will always run in any situation. Например, если интерпретатор запускает не In simple words everything inside if __name__ == "__main__": is only run when the module is execute directly by python interpreter (ex: python module.py) OR if functions are called explicitly after importing.. Python. python中if __name__ == '__main__': 的解析. "__main__" when the file is executed from the command line or with python -m (to execute a package’s __main__.py file) The name of the module, if the module is being imported Python programmers have developed a set of good practices to use when you want to develop reusable code. But how does that work.
if __name__ == __main__:的作用一个python文件通常有两种使用方法，第一是作为脚本直接执行，第二是 import 到其他的 python 脚本中被调用（模块重用）执行。因此if __name__ == main:的作用就是控制这两种情况执行代码的过程，在if __name__ == main: 下的代码只有在第一种情况下（即文件作为脚本直接执 …
In Python "if__name__== "__main__" allows you to run the Python files either as reusable modules or standalone programs.
When a Python interpreter reads a Python file, it first sets a few special variables. Then it executes the code from the file. EXAMPLE: testFile.py. Close • Posted by 6 minutes ago. Python 「if __name__ == ‘__main__’:」の意味. Pythonのコードはスクリプトファイルとして保存し、他のプログラムから再利用することがで … 29.4. User account menu • Explain me what "if __name__ == "__main__": " does like I am 5. Когда интерпретатор Python читает исходный файл, он исполняет весь найденный в нем код. Press J to jump to the feed. Python-Forum.de. The Python program (pt3.py) was executed directly (as opposed to being imported from another program), and we see the special global variable __name__ has the value __main__. Mutable und Immutable Objects. 当你打开一个.py文件时,经常会在代码的最下面看到if __name__ == '__main__':,现在就来介 绍一下它的作用. Again the def statements for main and myFunction are run. It then runs the code contained in the imported file. r/learnpython: Subreddit for posting questions and asking for general advice about your python code. One of those variables is called __name__. __main__ — Top-level script environment¶ '__main__' is the name of the scope in which top-level code executes. Themenbereiche. The line if __name__ == "__main__": tells the program that the code inside this if statement should only be executed if the program is executed as a standalone program. By importing nameScript, Python starts looking for a file by adding .py to the module name. Let's see what is __name__ in a program. Ähnliche Beiträge. merge, join und concat in Pandas . Foren-Übersicht. if __name__ == "__main__": Wenn du dir nicht sicher bist, in welchem der anderen Foren du die Frage stellen sollst, dann bist du hier im Forum für allgemeine Fragen sicher richtig. Browse other questions tagged python visual-studio-code main or ask your own question.
モジュール. Der Mechanismus wird auch dazu genutzt, komplexe Modultests du implementieren. It will not be executed if the program is imported as a module. More than 1 year has passed since last update.