How to invoke code in another Python file

How to invoke code in another Python file

No matter what language we choose to program, it is impossible to have only one file (except "Hello World"), usually we need to call another file in a file function Yes data and so on, in short, to manipulate the code in other files, in Java, As long as the same file directory, we do not need to import via import, but in Python, we need to import through imports, so that we can apply other files defined in the functions and data and other code. This is what we need to know about our new contact with Python.

The following is an example of two files, for example, we have a.py and b.py two files, when we need to apply the Func () function in the a.py in the b.py file, how to do it, there are two cases, respectively, in the same file directory and not in the same directory under the description.

In the same file directory

A call to the Func () function in the a.py file can be done with the following two statements in the b.py file

Import a #引用模块
A.func ()

or a

Import a# Application Module
From a import func #引用模块中的函数
Func () #这里调用函数就不需要加上模块名的前缀了

Under Different file directories

If you are not in the same directory, Python cannot find it, you must set up a lookup path, add the folder that contains the module to the system lookup path

Import Sys
Sys.path.append (' path where ' a.py is located ')
Import a
A.func ()

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How to invoke code in another Python file