day22_1-课前上节复习+os模块

# 01 模块的补充
# 01 模块的补充
# 01 模块的补充

"""
# ------------------------------------------------------------
# # 1、from 目录 import 文件
# # # 一般来说，涉及的跨目录调用一般是嵌套2层
目录结构：
day22_os_json_re_etc_MoKuai＼day22_os_json_re_etc_MoKuai.py( 该运行文件 )
day22_os_json_re_etc_MoKuai＼bin\bin.py
# ------------------------------------------------------------
"""
# from bin import bin
# if __name__ == "__main__":
#     print(bin.hello())
# #
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # here is bin directory!
# # hi! I am function hello!
# # None
# #
# # Process finished with exit code 0






# 02 sys修改环境变量
# 02 sys修改环境变量
# 02 sys修改环境变量
"""
# ------------------------------------------------------------
# # 2、sys修改环境变量（临时）
# # # 格式：sys.path.append("路径字符串") 或者 sys.path.append(r"路径字符串") 
# # # 只有在运行该程序的时候才进行临修改，永久性修改的话要去“系统属性中修改”
# # # 永久性修改：win7电脑怎样修改环境变量_百度经验
# # # https://jingyan.baidu.com/article/b24f6c82cba6dc86bfe5da9f.html

# ------------------------------------------------------------

"""
#
# import sys
# print("before:  ",sys.path)
# sys.path.append("day22_os_json_re_etc_MoKuai/bin/bin.py")
# print("after:   ",sys.path)
#
# sys.path.append(r"day22_os_json_re_etc_MoKuai/bin/bin.py")      # 正则的时候会有这个知识点
# print("after:   ",sys.path)
# #
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # before:   ['D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\Anaconda3\\python36.zip', 'D:\\Anaconda3\\DLLs', 'D:\\Anaconda3\\lib', 'D:\\Anaconda3', 'D:\\Anaconda3\\lib\\site-packages', 'D:\\Anaconda3\\lib\\site-packages\\win32', 'D:\\Anaconda3\\lib\\site-packages\\win32\\lib', 'D:\\Anaconda3\\lib\\site-packages\\Pythonwin', 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend']
# # after:    ['D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\Anaconda3\\python36.zip', 'D:\\Anaconda3\\DLLs', 'D:\\Anaconda3\\lib', 'D:\\Anaconda3', 'D:\\Anaconda3\\lib\\site-packages', 'D:\\Anaconda3\\lib\\site-packages\\win32', 'D:\\Anaconda3\\lib\\site-packages\\win32\\lib', 'D:\\Anaconda3\\lib\\site-packages\\Pythonwin', 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend', 'day22_os_json_re_etc_MoKuai/bin/bin.py']
# # after:    ['D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\Anaconda3\\python36.zip', 'D:\\Anaconda3\\DLLs', 'D:\\Anaconda3\\lib', 'D:\\Anaconda3', 'D:\\Anaconda3\\lib\\site-packages', 'D:\\Anaconda3\\lib\\site-packages\\win32', 'D:\\Anaconda3\\lib\\site-packages\\win32\\lib', 'D:\\Anaconda3\\lib\\site-packages\\Pythonwin', 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend', 'day22_os_json_re_etc_MoKuai/bin/bin.py', 'day22_os_json_re_etc_MoKuai/bin/bin.py']
# # D:/C_cache/py/day22_os_json_re_etc_MoKuai
# #
# # Process finished with exit code 0







# 03 BASEDIR的介绍
# 03 BASEDIR的介绍
# 03 BASEDIR的介绍

"""
# ------------------------------------------------------------
# # 3、os.path.dirname(__file__) 与  os.path.abspath(__file__)
# # # 返回的是.py文件的目录
# # # 1） os.path.dirname(__file__)使用、Python os.path.abspath(__file__)使用 - 洛水浮生 - 博客园
# # # http://www.cnblogs.com/luoshuifusheng/p/9207238.html
# # # 2） python中的os.path.dirname(__file__)的使用 - CSDN博客
# # # https://blog.csdn.net/u011760056/article/details/46969883
# # # 

# ------------------------------------------------------------

"""
#
# import os
# print("__file__: \n",__file__)
# # 返回脚本的路径( 执行文件下的前一级目录，这个是基于当前系统下的绝对路径，
# # 当工程的位置修改后，就可能导致出错)
# print(os.path.dirname(__file__))
#
# # 返回的是.py文件的绝对路径（完整路径）
# print( os.path.abspath(__file__) )
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # __file__:
# #  D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # D:/C_cache/py/day22_os_json_re_etc_MoKuai
# # D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 4、os.path.dirname(__file__) 与  os.path.abspath(__file__)  应用
# # # 在文件工程拷贝中，需要保证工程到其他的电脑系统中，不会出现文件路径问题，
# # # 可用下面的方式来解决
# # 4.1 __file__    这个拿到的是当前的文件名，在pycharm编译器中，编译器自动帮你添加了文件所在的路径
# ------------------------------------------------------------
"""
# import os,sys
#
# # # 这种虽然与下面的方式，似乎区别不大，但是实际上，这种方式在工程拷贝到其他电脑的时候
# # # 非常容易出错，因此采用的是下面的那种方式
# BASE_DIR1 = os.path.dirname(os.path.dirname((__file__)))
# sys.path.append(BASE_DIR1)
# print(BASE_DIR1)
# print(sys.path)
#
# # # 该的前一级目录（这个在工程拷贝到其他的系统中常用）<<<<<==========推荐使用
# BASE_DIR2 = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# sys.path.append(BASE_DIR2)
# print(BASE_DIR2)
# print(sys.path)
#
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # D:/C_cache/py
# # ['D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\Anaconda3\\python36.zip', 'D:\\Anaconda3\\DLLs', 'D:\\Anaconda3\\lib', 'D:\\Anaconda3', 'D:\\Anaconda3\\lib\\site-packages', 'D:\\Anaconda3\\lib\\site-packages\\win32', 'D:\\Anaconda3\\lib\\site-packages\\win32\\lib', 'D:\\Anaconda3\\lib\\site-packages\\Pythonwin', 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend', 'D:/C_cache/py']
# # D:\C_cache\py
# # ['D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'D:\\Anaconda3\\python36.zip', 'D:\\Anaconda3\\DLLs', 'D:\\Anaconda3\\lib', 'D:\\Anaconda3', 'D:\\Anaconda3\\lib\\site-packages', 'D:\\Anaconda3\\lib\\site-packages\\win32', 'D:\\Anaconda3\\lib\\site-packages\\win32\\lib', 'D:\\Anaconda3\\lib\\site-packages\\Pythonwin', 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend', 'D:/C_cache/py', 'D:\\C_cache\\py']
# #
# # Process finished with exit code 0





# 04 os模块的绍介
# 04 os模块的绍介
# 04 os模块的绍介

"""
# ------------------------------------------------------------
# # 5、os.getcwd() 
# # # os.getcwd() 方法用于返回当前工作目录。

# ------------------------------------------------------------
"""
#
# import os
# print( os.getcwd())
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # D:\C_cache\py\day22_os_json_re_etc_MoKuai
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 6、os.chdir() 
# # # os.chdir() 方法用于改变当前工作目录到指定的路径。

# ------------------------------------------------------------
"""
#
# import os
# print( "当前目录：   ",os.getcwd())
# print("返回上级目录：" ,os.chdir(".."))
# print( "当前目录：   ",os.getcwd())
#
# print("D:\\：        ", os.chdir("D:\\"))
# print( "当前目录：   ",os.getcwd())
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 当前目录：    D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # 返回上级目录： None
# # 当前目录：    D:\C_cache\py
# # D:\：         None
# # 当前目录：    D:\
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 7、os.chdir() 、 os.path.dirname 、 os.path.abspath() 与 __file__应用
# # # 获取执行文件所在的目录以及上级目录
# ------------------------------------------------------------
"""
#
# import os
# print( "当前目录：                    ",os.getcwd())
# print( "执行文件的绝对路径：          ",os.path.abspath(__file__) )
#
# os.chdir(os.path.dirname(os.path.abspath(__file__)))
# print( "返回执行文件的所在的目录：    ",os.getcwd())
#
# os.chdir(os.path.dirname( os.path.dirname(os.path.abspath(__file__))) )
# print( "返回执行文件的上一级目录：    ",os.getcwd())
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 当前目录：                     D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # 执行文件的绝对路径：           D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py
# # 返回执行文件的所在的目录：     D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # 返回执行文件的上一级目录：     D:\C_cache\py
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 8、os.curdir  返回当前目录: ('.')
# # # 返回当前目录: ('.'),它就是一个"."
# ------------------------------------------------------------
"""
#
# import os
# print(os.getcwd())
# print(os.curdir)
#
# print(os.getcwd())
# print(os.chdir("d:\\"))
#
# print(os.getcwd())
# os.chdir( os.curdir )
# print(os.getcwd())
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # .
# # D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # None
# # d:\
# # d:\
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 9、os.pardir  
# # # 获取当前目录的父目录字符串名：('..')
# ------------------------------------------------------------
"""
#
# import os
# print(os.pardir)
#
# print(os.getcwd())
# print(os.chdir(os.pardir))
# print(os.getcwd())
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ..
# # D:\C_cache\py\day22_os_json_re_etc_MoKuai
# # None
# # D:\C_cache\py
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 10、os.makedirs
# # # 可生成多层递归目录,需要注意的是，这个是在当前目录下所创建的
# # # 分隔符有两种表达，linux：   "a/b/c"；       windows:"a1\\b1\\c1"
# ------------------------------------------------------------
"""
#
# import os
# os.makedirs("a/b/c")
# os.makedirs("a1\\b1\\c1")
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 11、os.removedirs
# # #  若目录为空，则删除，并递归到上一级目录，如若也为空，则删除，依此类推
# # # 分隔符有两种表达，linux：   "a/b/c"；       windows:"a1\\b1\\c1"
# ------------------------------------------------------------
"""
#
# import os
# # 当前文件夹下创建文件夹
# os.makedirs("a/b/c")
# os.makedirs("a1\\b1\\c1")
# # 对上面的文件夹删除
# os.removedirs("a/b/c")
# os.removedirs("a1\\b1\\c1")
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 12、os.mkdir
# # # 生成单级目录；相当于shell中mkdir dirname
# # # 分隔符有两种表达，linux：   "a/b/c"；       windows:"a1\\b1\\c1"
# ------------------------------------------------------------
"""
#
# import os
# os.mkdir("mkfile")
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 13、os.rmdir
# # #  删除单级空目录，若目录不为空则无法删除，报错；相当于shell中rmdir dirname
# # # 分隔符有两种表达，linux：   "a/b/c"；       windows:"a1\\b1\\c1"
# ------------------------------------------------------------
"""

import os
# 当前文件夹下创建文件夹
# os.mkdir("mkfile")
# 并在 mkfile1 文件夹中文一个文件
# os.mkdir("mkfile1")
# 删除上述创建的文件夹
# os.rmdir("mkfile")
# 这里会报错，因为文件目录不是空的
# os.rmdir("mkfile1")
#
# #
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 14、os.listdir('dirname')
# # # 列出指定目录下的所有文件和子目录，包括隐藏文件，并以  列表方式打印
# ------------------------------------------------------------
"""
#
# import os
# print( os.listdir(os.curdir) )
# #
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ['.idea', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'mkfile', 'mkfile1']
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 15、os.remove()
# # # 删除一个文件
# ------------------------------------------------------------
"""
#
# import os
# print(os.listdir(os.curdir))
# print(os.remove('a'))
# print(os.listdir(os.curdir))
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ['.idea', 'a', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'mkfile', 'mkfile1']
# # None
# # ['.idea', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'mkfile', 'mkfile1']
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 16、os.rename()
# # # rename    重命名文件/目录    
# # # Python os.rename() 方法 | 菜鸟教程
# # # http://www.runoob.com/python/os-rename.html
# ------------------------------------------------------------
"""
#
# import os
#
# os.makedirs("a1\\b1")
# print("目录结构：", os.listdir(os.getcwd()))
#
# # ("a1\\b1")=====》("a1\\b22")
# os.rename("a1\\b1","a1\\b22")         # 会报错
# # a1===>>a22
# os.rename("a1","a22")
#
# print("目录结构：", os.listdir(os.getcwd()))
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 目录结构： ['.idea', 'a', 'a1', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'mkfile', 'mkfile1']
# # 目录结构： ['.idea', 'a', 'a22', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'mkfile', 'mkfile1']
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 17、os.stat('path/filename')  获取文件/目录信息
# # # 获取文件/目录信息
# ------------------------------------------------------------
"""
#
# import os
#
# print(os.listdir(os.getcwd()))
#
# os.mkdir("new")
# print(os.listdir(os.getcwd()))
#
# print(os.stat("new"))
# print(type(os.stat("new")) )
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ['.idea', 'a', 'a22', 'bin', 'day22_os_json_re_etc_MoKuai.py']
# # ['.idea', 'a', 'a22', 'bin', 'day22_os_json_re_etc_MoKuai.py', 'new']
# # os.stat_result(st_mode=16895, st_ino=8725724278321625, st_dev=3088873539, st_nlink=1, st_uid=0, st_gid=0, st_size=0, st_atime=1533522093, st_mtime=1533522093, st_ctime=1533522093)
# # <class 'os.stat_result'>
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 18、os.sep   
# # #  输出操作系统特定的路径分隔符，win下为"\\"(双斜杆，是因为第一个是转义字符),Linux下为"/"
# ------------------------------------------------------------
"""
#
# import os
# print(os.sep)
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # \
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 19、os.linesep    
# # #  输出当前平台使用的行终止符，win下为"\r\n",Linux下为"\n"
# ------------------------------------------------------------
"""
#
# import os
#
# # 默认被编译器处理为“回车”
# print((os.linesep),type(os.linesep))
# # 默认被编译器处理为“回车”
# print(str(os.linesep))
# print(list(os.linesep))
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# #
# #  <class 'str'>
# #
# #
# # ['\r', '\n']
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 20、os.pathsep       
# # #  输出用于分割文件路径的字符串 win下为;,Linux下为:
# ------------------------------------------------------------
"""
#
# import os
# print(os.pathsep)
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ;
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 21、os.name           
# # #  输出字符串指示当前使用平台。win->'nt'; Linux->'posix'
# ------------------------------------------------------------
"""
#
# import os
# print(os.name)
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # nt
# #
# # Process finished with exit code 0







"""
# ------------------------------------------------------------
# # 22、os.system("bash command")             
# # # 运行shell命令，直接显示
# # # 输出的结果和在控制台上运行的效果是一样的，只不过是用到了python os的模块来完成。
# # # 分享python os.system一点心得 - 老王python - 博客园
# # # https://www.cnblogs.com/wanpython/archive/2010/12/15/1906468.html
# ------------------------------------------------------------
"""
#
# import os
# print( os.system("bash command") )
# os.system("ping www.baidu.com")
#
# 结果是乱码的原因是因是pycharm中py的编码格式是 utf-8 的关系
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 'bash' ????????????????????????е????
# # ?????????????
# # 1
# #
# # ???? Ping www.a.shifen.com [14.215.177.38] ???? 32 ????????:
# # ???? 14.215.177.38 ????: ???=32 ???=11ms TTL=56
# # ???? 14.215.177.38 ????: ???=32 ???=12ms TTL=56
# # ???? 14.215.177.38 ????: ???=32 ???=12ms TTL=56
# # ???? 14.215.177.38 ????: ???=32 ???=11ms TTL=56
# #
# # 14.215.177.38 ?? Ping ??????:
# #     ?????: ????? = 4??????? = 4????? = 0 (0% ???)??
# # ?????г????????(????????λ):
# #     ??? = 11ms???? = 12ms????? = 11ms
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 23、os.environ  
# # # 获取系统环境变量   
# # # 当前系统的环境变量的查看方式：
# # # win7电脑怎样修改环境变量_百度经验
# # # https://jingyan.baidu.com/article/b24f6c82cba6dc86bfe5da9f.html          
# ------------------------------------------------------------
"""
#
# import os
# print(os.path)
# print(os.environ)
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # <module 'ntpath' from 'D:\\Anaconda3\\lib\\ntpath.py'>
# # environ({'ALLUSERSPROFILE': 'C:\\ProgramData', 'APPDATA': 'C:\\Users\\Roth\\AppData\\Roaming', 'COMMONPROGRAMFILES': 'C:\\Program Files\\Common Files', 'COMMONPROGRAMFILES(X86)': 'C:\\Program Files (x86)\\Common Files', 'COMMONPROGRAMW6432': 'C:\\Program Files\\Common Files', 'COMPUTERNAME': 'ROTH-PC', 'COMSPEC': 'C:\\Windows\\system32\\cmd.exe', 'FP_NO_HOST_CHECK': 'NO', 'HOMEDRIVE': 'C:', 'HOMEPATH': '\\Users\\Roth', 'LOCALAPPDATA': 'C:\\Users\\Roth\\AppData\\Local', 'LOGONSERVER': '\\\\ROTH-PC', 'MOZ_PLUGIN_PATH': 'D:\\Program Files (x86)\\Foxit Software\\Foxit Reader\\plugins\\', 'NUMBER_OF_PROCESSORS': '4', 'OS': 'Windows_NT', 'PATH': 'D:\\Anaconda3\\DLLs;D:\\Program Files (x86)\\Python27;D:\\Anaconda3;D:\\Anaconda3\\Library\\mingw-w64\\bin;D:\\Anaconda3\\Library\\usr\\bin;D:\\Anaconda3\\Library\\bin;D:\\Anaconda3\\Scripts;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\Intel\\OpenCL SDK\\3.0\\bin\\x86;C:\\Program Files (x86)\\Intel\\OpenCL SDK\\3.0\\bin\\x64;C:\\Program Files (x86)\\Calibre2\\;C:\\Program Files\\Microsoft VS Code\\bin', 'PATHEXT': '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC', 'PROCESSOR_ARCHITECTURE': 'AMD64', 'PROCESSOR_IDENTIFIER': 'Intel64 Family 6 Model 69 Stepping 1, GenuineIntel', 'PROCESSOR_LEVEL': '6', 'PROCESSOR_REVISION': '4501', 'PROGRAMDATA': 'C:\\ProgramData', 'PROGRAMFILES': 'C:\\Program Files', 'PROGRAMFILES(X86)': 'C:\\Program Files (x86)', 'PROGRAMW6432': 'C:\\Program Files', 'PSMODULEPATH': 'C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\Modules\\', 'PUBLIC': 'C:\\Users\\Public', 'PYCHARM_HOSTED': '1', 'PYCHARM_MATPLOTLIB_PORT': '49727', 'PYTHONIOENCODING': 'UTF-8', 'PYTHONPATH': 'D:\\Program Files (x86)\\PyCharm 2018.1.3\\helpers\\pycharm_matplotlib_backend;D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'PYTHONUNBUFFERED': '1', 'SESSIONNAME': 'Console', 'SYSTEMDRIVE': 'C:', 'SYSTEMROOT': 'C:\\Windows', 'TEMP': 'C:\\Users\\Roth\\AppData\\Local\\Temp', 'TMP': 'C:\\Users\\Roth\\AppData\\Local\\Temp', 'USERDOMAIN': 'Roth-PC', 'USERNAME': 'Roth', 'USERPROFILE': 'C:\\Users\\Roth', 'WINDIR': 'C:\\Windows'})
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 24、os.path.split(path)  
# # # 将path分割成目录和文件名二元组返回           
# ------------------------------------------------------------
"""
#
# import os
# # 实际上，__file__指的就是当前的执行文件名，只是在pycharm编译器中，编译器自动添加了执行文件的前面的路径
# print(os.path.split(__file__))
#
# print(os.path.split(os.path.dirname(__file__)))
# print(os.path.split(os.path.abspath(__file__)))
#
# print(os.path.split("D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))
# print(os.path.split(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ('D:/C_cache/py/day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # ('D:/C_cache/py', 'day22_os_json_re_etc_MoKuai')
# # ('D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # ('D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # ('D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# #
# # Process finished with exit code 0
# #






"""
# ------------------------------------------------------------
# # 25、os.path.basename(path)  
# # # 返回path最后的文件名。如何path以／或\结尾，那么就会返回空值。
# # # 即os.path.split(path)的第二个元素             
# ------------------------------------------------------------
"""
#
# import os
# print(os.path.split(__file__))
# print(os.path.basename(__file__))
#
# print(os.path.split(os.path.dirname(__file__)))
# print(os.path.basename(os.path.dirname(__file__)))
#
#
# print(os.path.split(os.path.abspath(__file__)))
# print(os.path.basename(os.path.abspath(__file__)))
#
# print(os.path.split(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
# print(os.path.basename(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # ('D:/C_cache/py/day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # day22_os_json_re_etc_MoKuai.py
# # ('D:/C_cache/py', 'day22_os_json_re_etc_MoKuai')
# # day22_os_json_re_etc_MoKuai
# # ('D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # day22_os_json_re_etc_MoKuai.py
# # ('D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai', 'day22_os_json_re_etc_MoKuai.py')
# # day22_os_json_re_etc_MoKuai.py
# #
# # Process finished with exit code 0






"""
# ------------------------------------------------------------
# # 26、os.path.exists(path)  
# # # 如果path存在，返回True；如果path不存在，返回False
# ------------------------------------------------------------
"""
#
# import os
# print(os.path.exists("D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))
# print(os.path.exists(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
# # txt文件是不存在的
# print(os.path.exists(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.txt"))  # 正则表达式
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # True
# # True
# # False
# #
# # Process finished with exit code 0



"""
# ------------------------------------------------------------
# # 27、os.path.isabs(path)    
# # # 如果path是绝对路径，返回True
# ------------------------------------------------------------
"""
#
# import os
#
# print("__file__                 ",os.path.isabs(__file__))
# print("dirname(__file__)        ",os.path.isabs(os.path.dirname(__file__)))
# print("abspath(__file__)        ",os.path.isabs(os.path.abspath(__file__)))
# print("os.curdir                ",os.path.isabs(os.curdir))
# print("输入已存在的文件路径     ",os.path.isabs(r"D:\C_cache\py\ \
# day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
# print("输入‘不’存在的文件路径 ",os.path.isabs(r"D:\C_cache\py\ \
# day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.txt"))  # 正则表达式
#
#
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # __file__                  True
# # dirname(__file__)         True
# # abspath(__file__)         True
# # os.curdir                 False
# # 输入已存在的文件路径      True
# # 输入‘不’存在的文件路径  True
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 28、os.path.isfile(path)  
# # # 如果path是一个存在的文件，返回True。否则返回False
# ------------------------------------------------------------
"""
#
# import os
# print("输入已存在的文件路径     ",os.path.isfile("D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))
#
# print("输入已存在的文件路径     ",os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.py"))  # 正则表达式
# # 这个是后缀名不对，因此才不存在
# print("输入‘不’存在的文件路径 ",os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\day22_os_json_re_etc_MoKuai.txt"))  # 正则表达式
#
# # 这个是一个文件夹
# print(os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai"))  # 正则表达式
# # 已经存在的文件
# print(os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\a"))  # 正则表达式
# print(os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\b.txt"))  # 正则表达式
# print(os.path.isfile(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\d.py"))  # 正则表达式
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 输入已存在的文件路径      True
# # 输入已存在的文件路径      True
# # 输入‘不’存在的文件路径  False
# # False
# # True
# # True
# # True
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 29、os.path.isdir(path)  
# # # 如果path是一个存在的目录，则返回True。否则返回False
# ------------------------------------------------------------
"""
#
# import os
#
# # 这个是一个存在的文件夹
# print(os.path.isdir(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai"))  # 正则表达式
#
# # 这个是一个‘不’存在的文件夹
# print(os.path.isdir(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai99999"))  # 正则表达式
#
#
# # 已经存在的文件
# print(os.path.isdir(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\a"))  # 正则表达式
# print(os.path.isdir(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\b.txt"))  # 正则表达式
# print(os.path.isdir(r"D:\C_cache\py\day22_os_json_re_etc_MoKuai\d.py"))  # 正则表达式
#
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # True
# # False
# # False
# # False
# # False
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 30、os.path.join(path1[, path2[, ...]])  
# # # 将多个路径组合后返回，第一个绝对路径之前的参数将被忽略
# ------------------------------------------------------------
目录结构：
D:\C_cache\py\day22_os_json_re_etc_MoKuai\a22\b1

==>>下面是演示拼接上面的目录
其中，方式一是不推荐使用的，推荐使用方式二

"""
#
# import os
# # 方式一
# tmp = "D:\\C_cache\py\\day22_os_json_re_etc_MoKuai" + "\\" + "a22\\b1"
# # 方式二
# a = "D:\\C_cache\py\\day22_os_json_re_etc_MoKuai"
# b = "a22\\b1"
# c = os.path.join(a,b)
#
# print("字符串加法处理：  ",tmp)
# print("os.path.join方法: ",c)
#
# #
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 字符串加法处理：   D:\C_cache\py\day22_os_json_re_etc_MoKuai\a22\b1
# # os.path.join方法:  D:\C_cache\py\day22_os_json_re_etc_MoKuai\a22\b1
# #
# # Process finished with exit code 0





"""
# ------------------------------------------------------------
# # 31、os.path.getatime(path)  
# # # 返回path所指向的文件或者目录的最后存取时间
# ------------------------------------------------------------

"""
#
# import os
#
# print(os.path.getatime("D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai\\b.txt"))
# print(os.path.getatime("D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai\\a22"))
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 1533538486.7024333
# # 1533521630.9828572
# #
# # Process finished with exit code 0




"""
# ------------------------------------------------------------
# # 32、os.path.getmtime(path)  
# # # 返回path所指向的文件或者目录的最后修改时间
# ------------------------------------------------------------

"""
#
# import os
#
# print(os.path.getmtime("D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai\\b.txt"))
# print(os.path.getmtime("D:\\C_cache\\py\\day22_os_json_re_etc_MoKuai\\a22"))
#
# # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_os_json_re_etc_MoKuai.py
# # 1533538486.7024333
# # 1533521630.9828572
# #
# # Process finished with exit code 0