Python Modules (2)

1.OS Module

1 Print (OS.GETCWD ())   # get current working directory 2 os.chdir ('E:\python Practice \python35 Learning ')   # Change directory 3  Print(OS.GETCWD ())

E:\python Practice \python35 Learning \day5
E:\python Practice \PYTHON35 Study

1 Print(Os.curdir)#current directory2 Print(Os.pardir)#Parent (previous level) directory3 Print(OS.SEP)#Path delimiter4 Print(OS.PATHSEP)#File Path Separator5 Print(Os.name)#currently using platform name,win--> ' NT ',linux--> ' POSIX '6 Print(Os.environ)#environment variables (shown in dictionary)

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Environ ({' processor_architecture ': ' AMD64 ', ' OS ': ' Windows_NT ', ' sessionname ': ' Console ', ' vs140comntools ': ' c:\\ Program Files (x86) \\Microsoft Visual studio\\shared\\14.0\\common7\\tools\\ ', ' logonserver ': ' \\\\DESKTOP-HU5CSPT ', ' Moz_plugin_path ': ' C:\\Program Files (x86) \\Foxit software\\foxit reader\\plugins\\ ', ' ProgramFiles (X86) ': ' c:\\ Program Files (x86) ', ' PYTHONPATH ': ' E:\\python practice \\python35 learning; d:\\python\\lib; F:\\pjproject-2.7\\tests\\pjsua ', ' pycharm_hosted ': ' 1 ', ' pythonunbuffered ': ' 1 ', ' msdevdir ': ' e:\\msdev98 ', ' _OLD_ Virtual_prompt ': ' $P $g ', ' pathext ': '. COM;. EXE;. BAT;. CMD;. VBS;. VBE;. JS;. JSE;. WSF;. WSH;. MSC ', ' systemdrive ': ' C: ', ' _old_virtual_path ': ' C:\\Program Files\\java\\jdk1.8.0\\bin; C:\\Program Files\\java\\jdk1.8.0\\jre\\bin; C:\\programdata\\oracle\\java\\javapath; C:\\Program Files (x86) \\Intel\\iCLS client\\; C:\\Program Files\\intel\\icls Client\\; C:\\Windows\\System32; C:\\Windows; C:\\windows\\system32\\wbem; c:\\windows\\system32\\windowspowershell\\v1.0\\; C:\\progRam Files (x86) \\Intel\\Intel (R) Management Engine components\\dal; C:\\Program Files\\intel\\intel (R) Management Engine components\\dal; C:\\Program Files (x86) \\Intel\\Intel (R) Management Engine components\\ipt; C:\\Program Files\\intel\\intel (R) Management Engine components\\ipt; C:\\Program Files (x86) \\NVIDIA Corporation\\physx\\common; C:\\Program Files (x86) \\Microsoft SQL server\\100\\tools\\binn\\; C:\\Program Files\\Microsoft SQL Server\\100\\tools\\binn\\; C:\\Program Files\\Microsoft SQL Server\\100\\dts\\binn\\; C:\\Windows\\System32; C:\\Windows; C:\\windows\\system32\\wbem; c:\\windows\\system32\\windowspowershell\\v1.0\\;D: \\mydownloads\\matlab\\r2016a\\runtime\\win64;d:\\ Mydownloads\\matlab\\r2016a\\bin;d:\\mydownloads\\matlab\\r2016a\\polyspace\\bin; C:\\Program Files\\Microsoft SQL Server\\130\\tools\\binn\\;D: \\Matlab install\\runtime\\win64;d:\\matlab install\\ Bin;d:\\matlab Install\\polyspace\\bin; C:\\Program Files\\mysql\\mysql Server 5.7\\bin; f:\\dsystem\\mysql-5.7.18-winx64\\bin;d:\\devlop\\mingw\\bin; C:\\users\\asus\\appdata\\local\\programs\\python\\python36;d:\\python3.5.2\\scripts\\;D: \\Python3.5.2\\;D: \ \ Anaconda3-4;d:\\anaconda3-4\\scripts;d:\\anaconda3-4\\library\\bin; E:\\tools\\winnt; E:\\msdev98\\bin; E:\\tools; C:\\users\\asus\\appdata\\local\\programs\\python\\python35; C:\\Program Files\\java\\jdk1.7.0_17\\bin; C:\\Program Files\\java\\jdk1.7.0_17\\jre\\bin; C:\\Program Files\\java\\jdk1.8.0\\bin ', ' homedrive ': ' C: ', ' PATH ': ' C:\\Program Files\\java\\jdk1.8.0\\bin; C:\\Program Files\\java\\jdk1.8.0\\jre\\bin; C:\\programdata\\oracle\\java\\javapath; C:\\Program Files (x86) \\Intel\\iCLS client\\; C:\\Program Files\\intel\\icls Client\\; C:\\Windows\\System32; C:\\Windows; C:\\windows\\system32\\wbem; c:\\windows\\system32\\windowspowershell\\v1.0\\; C:\\Program Files (x86) \\Intel\\Intel (R) Management Engine components\\dal; C:\\Program Files\\intel\\intel (R) Management Engine components\\dal; C:\\Program Files (x86) \\Intel\\Intel (R) Management Engine ComponentS\\ipt; C:\\Program Files\\intel\\intel (R) Management Engine components\\ipt; C:\\Program Files (x86) \\NVIDIA Corporation\\physx\\common; C:\\Program Files (x86) \\Microsoft SQL server\\100\\tools\\binn\\; C:\\Program Files\\Microsoft SQL Server\\100\\tools\\binn\\; C:\\Program Files\\Microsoft SQL Server\\100\\dts\\binn\\; C:\\Windows\\System32; C:\\Windows; C:\\windows\\system32\\wbem; c:\\windows\\system32\\windowspowershell\\v1.0\\;D: \\mydownloads\\matlab\\r2016a\\runtime\\win64;d:\\ Mydownloads\\matlab\\r2016a\\bin;d:\\mydownloads\\matlab\\r2016a\\polyspace\\bin; C:\\Program Files\\Microsoft SQL Server\\130\\tools\\binn\\;D: \\Matlab install\\runtime\\win64;d:\\matlab install\\ Bin;d:\\matlab Install\\polyspace\\bin; C:\\Program Files\\mysql\\mysql Server 5.7\\bin; F:\\dsystem\\mysql-5.7.18-winx64\\bin;d:\\devlop\\mingw\\bin; C:\\users\\asus\\appdata\\local\\programs\\python\\python36;d:\\python3.5.2\\scripts\\;D: \\Python3.5.2\\;D: \ \ Anaconda3-4;d:\\anaconda3-4\\scripts;d:\\anaconda3-4\\library\\biN E:\\tools\\winnt; E:\\msdev98\\bin; E:\\tools; C:\\users\\asus\\appdata\\local\\programs\\python\\python35; C:\\Program Files\\java\\jdk1.7.0_17\\bin; C:\\Program Files\\java\\jdk1.7.0_17\\jre\\bin; C:\\Program Files\\java\\jdk1.8.0\\bin; E:\\python Practice \\python35 Learning \\venv\\Scripts ', ' psmodulepath ': ' C:\\Program Files\\windowspowershell\\modules; C:\\windows\\system32\\windowspowershell\\v1.0\\modules ', ' COMMONPROGRAMW6432 ': ' C:\\Program Files\\Common Files ', ' Processor_level ': ' 6 ', ' Public ': ' C:\\users\\public ', ' number_of_processors ': ' 4 ', ' virtual_env ': ' E:\\python called Lee range \ \ Python35 Ying ^ \\venv ', ' java_home ': ' C:\\Program files\\java\\jre7 ', ' userprofile ': ' C:\\users\\asus ', ' COMSPEC ': ' c:\\ Windows\\system32\\cmd.exe ', ' allusersprofile ': ' C:\\programdata ', ' APPDATA ': ' c:\\users\\asus\\appdata\\roaming ', ' windir ': ' C:\\Windows ', ' PROGRAMDATA ': ' C:\\programdata ', ' ProgramFiles ': ' C:\\Program Files ', ' Matlab_java ': ' c:\\ Program Files\\java\\jre7 ', ' userdomain_roamingprofile ': ' desktop-hu5cspt ', ' PROMPT ': ' (venv) $P $g ', ' processor_identifier ': ' Intel64 Family 6 Model Stepping 3, Genuineintel ', ' mw_mingw64_loc ': ' d:\\tdm- GCC-64 ', ' LIB ': ' E:\\microsoft Visual studio\\vc98\\mfc\\lib; E:\\microsoft Visual studio\\vc98\\lib ', ' COMPUTERNAME ': ' desktop-hu5cspt ', ' dxsdk_dir ': ' D:\\directx sdk\\include ', ' Pythonioencoding ': ' UTF-8 ', ' localappdata ': ' c:\\users\\asus\\appdata\\local ', ' USERNAME ': ' ASUS ', ' SYSTEMROOT ': ' \ C ' \ Windows ', ' TMP ': ' c:\\users\\asus\\appdata\\local\\temp ', ' userdomain ': ' desktop-hu5cspt ', ' INCLUDE ': ' e:\\ Microsoft Visual Studio\\vc98\\atl\\include; E:\\microsoft Visual Studio\\vc98\\mfc\\include; E:\\microsoft Visual studio\\vc98\\include ', ' TEMP ': ' c:\\users\\asus\\appdata\\local\\temp ', ' PROGRAMW6432 ': ' c:\\ Program Files ', ' processor_revision ': ' 4e03 ', ' fps_browser_app_profile_string ': ' Internet Explorer ', ' CLASSPATH ': ' \ C \program Files\\java\\jdk1.7.0_17\\lib; C:\\Program Files\\java\\jdk1.7.0_17\\lib\\dt.jar; C:\\Program Files\\java\\jdk1.7.0_17\\lib\\tools.jar; C:\\proGram files\\java\\jdk1.8.0\\lib; C:\\Program Files\\java\\jdk1.7.0_17\\lib\\dt.jar; C:\\Program Files\\java\\jdk1.7.0_17\\lib\\tools.jar ', ' fps_browser_user_profile_string ': ' Default ', ' HOMEPATH ': ' \ \users\\asus ', ' CommonProgramFiles (X86) ': ' C:\\Program Files (x86) \\Common files ', ' commonprogramfiles ': ' C:\\Program Files\\Common Files '})

Os.makedirs (R'E:\a\b\c\d')#recursive creation of multilevel catalogsOs.removedirs (R'E:\a\b\c\d')#from the back to determine whether the directory is empty, if it is empty deleteOs.mkdir (R'e:\a')#only one level directory can be created at a timeOs.rmdir (R'e:\a')#only one directory can be deleted at a time, if it is empty, do not deleteOs.remove (R'E:\CLion\CLion 2017.2.2\build.txt')#Deleting Files

 1  print  (Os.listdir (R ' E:\CLion\CLion 2017.2.2  " )) #   2  os.rename (r " e:\python Practice \fib.py   ", R"  e:\ Python practice \fibnan1.py   ") #   rename  3  print  (Os.stat (R '  " ) #   file or directory status information  

[' bin ', ' help ', ' jre64 ', ' lib ', ' license ', ' plugins ']
Os.stat_result (st_mode=16895, st_ino=18295873486193234, st_dev=2227732002, St_nlink=1, St_uid=0, St_gid=0, st_size= 4096, st_atime=1516964219, st_mtime=1516964219, st_ctime=1499412376)

1 os.system ('ifconfig')  # run shell command

1 Print(Os.path.abspath (__file__))#Absolute Path2 Print(Os.path.dirname ('E:\python Practice \python35 Learning \day5\os_test.py'))#the last one \ Previous3 Print(Os.path.basename ('E:\python Practice \python35 Learning \day5'))#the last one \ after4 Print(Os.path.split ('E:/python Practice/python35 Learning/day5/os_test.py'))#separating files from directories to form tuples5 Print(Os.path.exists ('E:/python Practice/python35 Learning/day5'))#determine if a file or directory exists6 Print(Os.path.isabs ('python Practice/python35 Learning/day5/os_test.py'))#determine if it is an absolute path7 Print(Os.path.isfile ('E:/python Practice/python35 Learning/day5/os_test.py'))#determine if it is a file8 Print(Os.path.isdir ('E:/python Practice/python35 Learning/day5/os_test.py'))#determine if it is a directory9 Print(Os.path.join (R'E:/python Practice/python35 Learning/day5/'R'Day5.txt'))#Path ConnectionTen Print(Os.path.getatime ('E:/python Practice/python35 Learning/day5/os_test.py'))#Last access time Access One Print(Os.path.getmtime ('E:/python Practice/python35 Learning/day5/os_test.py'))#last modified on modify

Python Modules (2)