Python learning notes -- import module, pythonimport

Python learning notes -- import module, pythonimport

OS Module

Directly output the system command to the screen. The return value of the command obtained by this method cannot be assigned to the variable. The output result is garbled by encoding:

Import osos. system ("ipconfig ")

Save the obtained system commands to the memory, read the results in the memory, and output them to the screen without garbled characters:

Import oscom = OS. popen ("ipconfig"). read () print (com)

Create a folder in the directory where the execution file is located

Import osos. makedirs ("makedir ")

SYS module

Print Python environment variable path:

 

Import sysprint (sys. path)

 

When using a Python script in the command line, You need to include parameters using the argv method:

Import sysprint (sys. argv [2])

For example, if you save the above Code to sys_argv.py, run the following command in CMD:

Run: C: \ Users \ peg \ PycharmProjects \ pystudy \ day2> python sys_argv.py 1 2 3 4 output result: 2