python环境打包及恢复，全程离线

打包

set req=..\req_pkg_py_env.txt
set whs=..\wheels
pip freeze >%req%
pip wheeel -r %req% -w %whs%
pip wheeel pip -w %whs%
pip wheeel setuptools -w %whs%
pip wheeel wheeel -w %whs%
pip uninstall -r %req% -y
pause

恢复

set req=..\req_pkg_py_env.txt
set whs=..\wheels
set get-pip=..\get-pip.py
python %get-pip% --no-index --find-links=%whs%
pip install  -r %req% --no-index --find-links=%whs%
pause

环境变量配置

@echo off
set PYTHONHOME=%cd%
set PATH=%PYTHONHOME%/Scripts;%PYTHONHOME%;%PATH%
set PYTHONPATH=%PYTHONHOME%/Lib
title %PYTHONHOME%\python.exe
call cmd

环境变量配置
get-pip.py文件来自：https://bootstrap.pypa.io/get-pip.py
python37._pth注意修改

python37.zip
.
# Uncomment to run site.main() automatically
import site

获取当前系统桌面地址

import os
def GetDesktopPath():   # 获取桌面
    return os.path.join(os.path.expanduser("~"), 'Desktop')

文本文档读写

直接读着操作

# !/usr/bin/env python
str1, str2, str3 = '--      :', '--  WARN:','-- Off'
def read_File(file_name):   # 读文件
    with open(file_name,'r') as f:
        list_file = []
        for line in f:
            if str1 in line:
                continue
            elif str2 in line:
                continue
            elif str3 in line:
                continue
            else:
                list_file.append(line)
        return list_file
def write_File(content):    # 写文件
    with open(r'YD_SCH_new.INC','w') as f:
        f.writelines(content)
def main():
    file_name = 'YD_SCH.INC'
    content = read_File(file_name)
    write_File(content)
if __name__ == '__main__':
    main()

直接转换为列表

# !/usr/bin/env python
def read_File(file_name):   # 读文件
    with open(file_name,'r') as f:
        list_file = []
        for line in f:
                list_file.append(line)
    return list_file
def write_File(content):    # 写文件
    with open(r'YD_SCH_new.INC','w') as f:
        f.writelines(content)
def main():
    file_name = r'F:\2020\Lu9\work\eclipse\sch\1066\LU9_RST_1066_y.SCH'
    content = read_File(file_name)
    write_File(content)
if __name__ == '__main__':
    main()

判断奇偶数（求余数）

# Python 判断奇数偶数
# 如果是偶数除于 2 余数为 0
# 如果余数为 1 则为奇数
num = int(input("输入一个数字: "))
if (num % 2) == 0:
   print("{0} 是偶数".format(num))
else:
   print("{0} 是奇数".format(num))