getopt This function is used to extract the user input is determined to get sys.argv step.
getopt a module, and this module which there getopt function, so it need getopt use.
getopt.getopt ([command line parameter list], "short option" [a long list of options])
This function returns two values. Opts and args
opts there is a tuple of all options and their input values. When the input is determined, this value can not be changed.
args useful to remove the remaining part after the input.
1 import getopt,sys 2 shortargs = 'f:t' #短选项 3 longargs = ['directory-prefix=', 'format', '--f_long='] #长选项 4 opts,args= getopt.getopt( sys.argv[1:], shortargs, longargs) 5 print 'opts=',opts 6 print 'args=',args
Format getopt function is getopt.getopt ([command line parameter list], "short option" [a long list of options]) colon after the short option name (:) indicates that option must have additional parameters. Equal sign (=) after the long option name indicates that the option must have additional parameters.
Several output is:
Distinguish longargs long options which data is what must be added in front of the - otherwise abnormal. E.g
Correct format: ---- f_long = 'data'
Error Format: - f_long = 'data'
correct:
