__name__ == python中__name__的使用

其中if __name__ == ‘__main__’:這句估計很多和我一樣的初學者都是不求甚解。這里作一下解釋: 1:__name__是一個變量。前后加了爽下劃線是因為是因為這是系統定義的名字。普通變量不要使用此方式命名變量。2:Python有很多模塊,而這些模塊是可以

__name__ (A Special variable) in Python
8/7/2019 · Unlike other programming languages, python is not designed to start execution of the code from a main function explicitly. A special variable called __name__ provides the functionality of the main function. As it is an in-built variable in python language, we can write
Use of if __name__ == “__main__”: in Python – a tryst with programming
對於 __name__ == ‘__main__’ 到底是什麼意思,一直存有疑問;在我的爬蟲課程的問題討論區中,也不時看到同樣的問題。如果你上網搜尋之後還是似懂非懂,這篇文章會嘗試用初學者的角度再說明一次。 首先,如果你永遠都只執行一個 Python 檔,而不引用別的 Python 檔案的話,那你完全不需要了解這是
What’s in a (Python’s) __name__? – freeCodeCamp.org

Python __name__==’__main__’作用詳解

if __name__ == ‘__main__’: 這行代碼的作用是什么呢?本節就詳解講解以下它的作用。 一般情況下,當我們寫完自定義的模塊之后,都會寫一個測試代碼,檢驗一些模塊中各個功能是否能夠成功運行。例如,創建一個 candf.py 文件,并編寫如下代碼:

Python if __name__ == __main__ Explained with Code …

3/7/2020 · When a Python interpreter reads a Python file, it first sets a few special variables. Then it executes the code from the file. One of those variables is called __name__. If you follow this article step-by-step and read its code snippets, you will learn how to use if
Python Tutorial: if __name__ == '__main__' - YouTube
Python __name__
Python __name__ 原文: Python3 面向對象 像是一個菜鳥 關于 __name__ 首先需要了解 __name__ 是屬于 python 中的內置類屬性,就是它會天生就存在于一個 python 程序中,代表對應程序名稱
#47 Python Tutorial for Beginners | Special Variable __name__ part 2 - YouTube
__name__ (A Special variable) in Python
25/7/2017 · __name__ is a built-in variable which evaluates to the name of the current module. Thus it can be used to check whether the current script is being run on its own or being imported somewhere else by combining it with if statement, as shown below. Consider two
Python Tutorial - if __name__ =='__main__' - YouTube
if __name__ == ‘__main__’ 如何正確理解?
Python中“if __name__==’__main__’:”的詳細解答。__name__是魔法函數的一種,如果大家想詳細了解和魔法函數相關的知識點擊這里,里面整理了Python中常見的魔法函數用法,都有詳細的代碼解析: 初識CV:Python:實例講解Python中的魔法函數(高級語法) zhuanlan.zhihu.com
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python編程中的if __name__ == 'main' 的作用和原理 - 知乎

Python中if __name__ == ‘__main__’:的作用和原理_二黑 …

if __name__ == ‘__main__’:的作用一個python文件通常有兩種使用方法,第一是作為腳本直接執行,第二是 import 到其他的 python 腳本中被調用(模塊重用)執行。因此if __name__ == ‘main’:的作用就是控制這兩種情況執行代碼的過程,在if __name__ == ‘main’: 下
Using if __name__ == '__main__' : Explanation, When to use, how to use ? - YouTube
Whenever the Python interpreter reads a source file, it does two things: it sets a few special variables like __name__, and then it executes all of the code found in the file. Let’s see how this works and how it relates to your question about the __name__ checks we always see in Python scripts.
Whenever the Python interpreter reads a source file, it does two things: it sets a few special variables like __name__ , and then it executes all最佳回答 · 7253When your script is run by passing it as a command to the Python interpreter, python myscript.py
all of the code that is at indentation level 0 ge1909The simplest explanation for the __name__ variable (imho) is the following: Create the following files. # a.py
import b
and # b.py
print “Hello751What does the if __name__ == “__main__”: do? To outline the basics: The global variable, __name__ , in the module that is the entry point to you527if __name__ == “__main__” is the part that runs when the script is run from (say) the command line using a command like python myscript.py .131What does if __name__ == “__main__”: do? __name__ is a global variable (in Python, global actually means on the module level ) that exists in a85There are lots of different takes here on the mechanics of the code in question, the “How”, but for me none of it made sense until I understood the74When there are certain statements in our module ( M.py ) we want to be executed when it’ll be running as main (not imported), we can place those st54Put simply, __name__ is a variable defined for each script that defines whether the script is being run as the main module or it is being run as48

python – Why do I have to use if __name__ == ‘__main__’ in 7/12/2020
What is __qualname__ in python?


What does “__name__” mean in Python?
7/6/2020 · So __name__ gets its value depending on how we execute the containing script. Only the file that you are running has a __name__ set to ‘__main__’. Photo by Keith Luke on Unsplash
Python Tutorial if __name__ == '__ main__' Explained - YouTube
What is if __name__ == “__main__” ??
Here we are creating a new module and executing it as main program so the value of __name__ is set to ‘__main__’.As a result, the if condition satisfies and the function hello() gets called.Now create a new file called module.py and write the following code:
if __name__ == __'main'__ : | Name Variable in Python | Python Tutorial for Beginners - YouTube