Introduction to the Python module

Modules: Code to implement a function of the code set, functional modularity, save time, improve efficiency

First, the module import

The import module, in fact, tells the Python interpreter to explain the corresponding. py file

• Import the. py file, and the interpreter interprets the. py file

• Pour a package that explains the package under the __init__.py file

To import a module method:

1 Import  Time 2  from Import Sleep 3  from Import Sleep as SP 4  from Import *

The path to the import module, which is Sys.path

1 ImportSYS2 Print(Sys.path)3 4 #The results are as follows5['C:\\users\\lenovo\\pycharmprojects\\ethan\\study_day7','C:\\users\\lenovo\\pycharmprojects\\ethan','C:\\python35\\python35.zip','C:\\python35\\dlls','C:\\python35\\lib','c:\\python35','c:\\python35\\lib\\site-packages']

If you don't have the path you want, use Sys.path.append (' path ') to add

Various catalogs can be obtained through the OS module, such as:

1 Import SYS 2 Import OS 3 4 Pre_path = Os.path.abspath ('./')5#  Print (Pre_path)6 sys.path.append (Pre_path)

Second, the classification of the module
Custom modules: Personal writing, making calls in code you write

Built-in modules: Python official offers

Open Source module: Third-party authoring, open source download installation use

Download the installation method:

12pip3 apt-get

1 Download Source code 2 Decompression Source 3 Go to Catalog 4 compiled source    python setup.py build5 installation source    python setup.py install

Method Two

Introduction to the Python module