Python__module(tools-system)__psutil/sys/argparse/distutils

psutil (introduction)

Obtain information about the processes running on the system and system utilization (including CPU, memory, disk, network, etc.).

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psutil (understand)

psutil is a cross-platform library (http://pythonhosted.org/psutil/)

It is mainly used for system monitoring, performance analysis, and process management.

It implements the functionality provided by equivalent command line tools.

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psutil (reference code)

The proportion of memory used by the program to run

import subprocess, psutil, gc

mem1 = psutil.virtual_memory()
print(f'某程序前-内存已使用：{mem1.used}')
print(f'某程序前-内存剩余：{mem1.free}')
print(f'某程序前-内存百分比：{mem1.percent}')

app1 = subprocess.Popen(r'C:\Windows\write.exe')
app2 = subprocess.Popen(r'C:\Windows\winhlp32.exe')
app3 = subprocess.Popen(r'C:\Windows\write.exe')

mem2 = psutil.virtual_memory()
print(f'某程序后-内存已使用：{mem2.used}')
print(f'某程序后-内存剩余：{mem2.free}')
print(f'某程序后-内存百分比：{mem2.percent}')

app1.kill()
app2.kill()
app3.kill()

gc.collect()#启用垃圾回收模式
mem3 = psutil.virtual_memory()
print(f'GC回收后-内存已使用：{mem3.used}')
print(f'GC回收后-内存剩余：{mem3.free}')
print(f'GC回收后-内存百分比：{mem3.percent}')

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sys(Introduction)

An interface for Python interpreter interaction, mainly surrounding some auxiliary tools for Python programs. For example: control the running of Python programs, change the Python environment...

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sys (parameter list)

sys.exit()	exit the program The default is 0, which means a normal exit, and it can also be 1, which means an abnormal exit. [Example] sys.exit(0) or sys.exit(1)
sys.path.append(path)	Call Python file 【example】 #Add path (AG.py is placed on the computer desktop) import sys sys.path.append('C:/Users/Administrator/Desktop') # Call file # import AG
sys.argv	Implementation of passing parameters from outside the program to the program
sys.path	List of directory names containing input modules
sys.version	Get Python interpreter version
sys.exc_info()	Return exception information triplet
sys.getdefaultencoding()	Get the current encoding of the system, the default is utf-8
sys.setdefaultencoding()	Set the system's default encoding
sys.getfilesystemencoding()	Get the encoding used by the file system, the default is utf-8
sys.modules	Returns all imported modules in the current Python environment in the form of a dictionary
sys.copyright	Current Python copyright information
sys.getrefcount(object)	Returns the number of references to the object
sys.getrecursionlimit()	Returns the maximum recursion depth of Python, default is 1000
sys.getsizeof(object[, default])	Returns the size of the object
sys.getwindowsversion()	Returns the version information of the current Windows system
sys.executable	Absolute path to python.exe
sys.prefix	Current python installation path
sys.exec_prefix	Installation path of basic python environment
sys.base_exec_prefix	Installation path of basic python environment
sys.builtin_module_names	All modules in the python interpreter
sys.stdlib_module_names	A frozen collection containing standard library module name strings
sys.hexversion	integer version number
sys.is_finalizing()	#True if the Python interpreter is exiting

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argparse (introduction)

Custom python commands.

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argparse (understand)

[Self-built command tool]

Terminal: python file command command function

【example】

Terminal: python demo.py --help 

# help command (see documentation)

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argparse (reference code)

Simple example

import argparse

parser = argparse.ArgumentParser(description="【文档描述】")
parser.add_argument("-f", "--function", help="【-f或--function命令 关于函数功能的使用方法】")
parser.add_argument("-i", "--info", help="【-i或--info命令 关于文档的注释】")

args = parser.parse_args()
if args.function == "function":
    print(">>>输入了function命令")
elif args.info == "info":
    print(">>>输入了info命令")
else:
    pass

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distutils (introduction)

Custom Python module.

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distutils (understand)

【Instructions】

Package Python' modules, then publish, install and use.

【Module installation】

Source package: python setup.py install

Online installation: pip install package name (linux) / easy_install package name (window)

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distutils (reference code)

Custom module (simplified version)

from distutils.core import setup
setup(
    name='test_md',               # 安装的模块名
    version='1.0',                # 版本
    author='AG',                  # 作者
    author_email='@xxx.com',      # 邮箱
    py_modules=['test'],          # 使用的模块名
)
# @使用方法 /
# 1.新建test.py文件 ->  内容(随便写个函数)
# 2.新建setup.py文件 -> 内容(上面代码加入)
# 3.两个文件同处一个目录下->当前目录->终端:python setup.py sdist
# 4.(安装模块) 终端:python setup.py install
# 5.(测试):import test #test.test()
# --------------------------------- /

Custom module (detailed version)

# -*- encoding: UTF-8 -*-
from setuptools import setup
setup(
    name='testFunc',                        # 安装包名 注释:尽量与packages属性的项目文件夹名相同
    version='0.1',                          # 版本信息
    author='AG',                            # 作者
    author_email='[email protected]',           # 作者邮箱地址
    description='关于程序的描述',            # 程序的简单描述
    long_description='关于程序的详细描述',   # 程序的详细描述
    keywords='关于程序的关键词',             # 程序的关键字列表
    packages=['testFunc'],                  # 要打包的项目文件夹
    include_package_data=True,              # 自动打包文件夹内所有数据
    zip_safe=True,                          # 设定项目包为安全,不用每次都检测其安全性
    install_requires=[                      # 需要安装的依赖包
        'docutils>=0.3',
        'requests',
    ],
)
# @流程 /
# 1.新建setup.py文件 -> 内容(上面代码加入)
# 2.新建文件夹 -> func.py , init.py
# 3.setup.py 所在目录 ->
# 终端:python setup.py sdist    进行打包
#     :python setup.py build    构建目录
#     :python setup.py install  安装包
# ---------------------------------------/

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