Common module One--sys--os---haslib digest algorithm

Module load order ===>> Python interpreter ====>>> third-party module =====>>> custom module

Common Modules 1

Import SYS Print (sys.modules)           #   Sys.modules found the currently loaded module, Sys.modules is a dictionary

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SYS module
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SYS interfaces with Python explaining its interactions

ImportSys#SYS interfaces with Python explaining its interactionsPrint(SYS.ARGV)#Current Path#if sys.argv[1] = = ' Alex ' and sys.argv[2]== ' somebody ':#print (' Login successful! ')#Else:#print (' Login failed! ')Print(sys.version)# Version information 3.6.1 (V3.6.1:69C0DB5, Mar, 18:41:36) [MSC v.1900-bit (AMD64)]#sys.exit ()Print(Sys.path)#========= Import Order #[' E:\\pycharmprojects\\python course \\s7 day20 ', ' e:\\pycharmprojects ', ' e:\\pycharmprojects\\ Python course \\s7 Day20\\python\\lib\\site-packages\\easygui ', ' d:\\python36\\python36.zip ', ' d:\\python36\\dlls ', ' D:\ \python36\\lib ', ' d:\\python36 ', ' d:\\python36\\lib\\site-packages ', ' d:\\python36\\lib\\site-packages\\win32 ', ' D : \\python36\\lib\\site-packages\\win32\\lib ', ' D:\\python36\\lib\\site-packages\\pythonwin ']Sys.path.append ('import a path that is not in Sys.path')Print(sys.Platform)#Win32

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  Hashlib Digest algorithm
====================

ImportHashlibmd5_obj=HASHLIB.MD5('Salt'. Encode ('Utf-8'))#string add salt processing (plus user name)md5_obj. Update('Hello'. Encode ('Utf-8'))#Update processing additivePrint(Md5_obj. Hexdigest())#Show summary after all update Abstract Algorithm application: File consistency check, login user login ----Generate summary one-way non-return = = too simple when ----salt processing------salt

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OS operating system module
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operating system (software)----down-management hardware----- provide interface applications upward ImportOS# and    Directory- related # and   path-  Related # and file  -related # and OS-related #  associated with system commands #Print(OS.GETCWD ()) # View current directory path ##print (path)# Change work path Os.chdir##print (os.pardir) #. .#print (os.curdir) # . #OS. mkdir (' dir ')#OS. makedirs (' Dirs\\dir ')  Create a folder  #OS. rmdir (' dir ')#OS. Removedirs  (' Dirs\\dir ') Delete a folder #Print (OS. Listdir (OS.GETCWD ())) # listing Information # [' 1.py ', ' re-supplemental. Py ', ' module. Py '] ##======= os.stat (path) # Get file information ==========##Print (Os.stat (R ' E:\PycharmProjects\python course \s7 day20 ')) # Get file information Os.stat_result (st_mode=16895, st_ino= 38843546786076162, st_dev=513101, St_nlink=1, St_uid=0, St_gid=0, st_size=4096, st_atime=1505201438, st_mtime= 1505201438, st_ctime=1505176488)## File_state=os.stat (R ' E:\PycharmProjects\python course \s7 day20 ')#  print (File_state.st_mode)

#print (os.sep) # \ delimiter #print ([os.linesep]) # [' \ r \ n '] line break ##print (os.name) # win NT---judgment system ##  os.system (' dir ')  # exec # obj=os.popen (' dir ') # eval # for I in obj:#print (i)##PrintOs.environ)  #Environment Variables Environ ({' allusersprofile ': ' C:\\programdata ', ' APPDATA ': ' c:\\users\\administrator\\appdata\\roaming ', ' CommonProgramFiles ': ' C:\\Program Files\\Common Files ', ' CommonProgramFiles (X86) ': ' C:\\Program Files (x86) \\Common Files ', ' COMMONPROGRAMW6432 ': ' C:\\Program Files\\Common Files ', ' COMPUTERNAME ': ' user-20170417ed ', ' COMSPEC ': ' c:\\ Windows\\system32\\cmd.exe ', ' fp_no_host_check ': ' NO ', ' homedrive ': ' C: ', ' HomePath ': ' \\Users\\Administrator ', ' LocalAppData ': ' c:\\users\\administrator\\appdata\\local ', ' logonserver ': ' \\\\user-20170417ed ', ' NUMBER_OF_ Processors ': ' 4 ', ' OS ': ' Windows_NT ', ' PATH ': ' D:\\python36\\scripts;d:\\python36; C:\\Windows\\System32; C:\\Windows; C:\\windows\\system32\\wbem; c:\\windows\\system32\\windowspowershell\\v1.0\\;D: \\python36;d:\\python36\\lib\\site-packages\\pypiwin32_ System32 ', ' pathext ': '. COM;. EXE;. BAT;. CMD;. VBS;. VBE;. JS;. JSE;. WSF;. WSH;. MSC;. PY;. PYW ', ' processor_architecture ': ' AMD64 ', ' processor_identifier ': ' Intel64 Family 6 Model stepping 9, GenuiNeintel ', ' processor_level ': ' 6 ', ' processor_revision ': ' 3a09 ', ' 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 ', ' Pythonioencoding ': ' UTF-8 ', ' PYTHONPATH ': ' E:\\pycharmprojects;python/lib/site-packages/easygui ', ' Pythonunbuffered ': ' 1 ', ' sessionname ': ' Console ', ' systemdrive ': ' C: ', ' SYSTEMROOT ': ' C:\\Windows ', ' TEMP ': ' C:\\users\ \admini~1\\appdata\\local\\temp ', ' TMP ': ' c:\\users\\admini~1\\appdata\\local\\temp ', ' userdomain ': ' User-20170417ed ', ' USERNAME ': ' Administrator ', ' userprofile ': ' C:\\users\\administrator ', ' vbox_msi_install_path ': ' E:\\virtualbox\\ ', ' windir ': ' C:\\Windows ', ' windows_tracing_flags ': ' 3 ', ' windows_tracing_logfile ': ' C:\\BVTBin\\ Tests\\installpackage\\csilogfile.log ', ' _dfx_install_unsigned_driver ': ' 1 '})##Path#print (os.path.abspath(' 1.py ')) # Gets the absolute path C:\Users\Administrator\Desktop\1.py#print (OS.  Path.split(R ' C:\Users\Administrator\Desktop\1.py ')) # (' C:\\users\\administrator\\desktop ', ' 1.py ')#=====os.path.join () path stitching ==============#Print (Os.path.join (path1,path2)) automatically adds

Common module One--sys--os---haslib digest algorithm