Python determines whether a file exists and permissions

#-*-coding:utf-8-*-import osimport sysif len (sys.argv) = = 2:filename=sys.argv[1]if not os.path.isfile (filename):p rint ' [-] ' + filename + ' does not exist. ' Exit (0) if not os.access (filename, os. R_OK):p rint ' [-] ' + filename + ' access denied. ' Exit (0) print ' [+] reading vulnerabilities from: ' + filename

Execution results: The first is a nonexistent file, the second is a file that exists and has permissions

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Python determines whether a file exists and permissions