On May 11, 2:28 pm, [EMAIL PROTECTED] wrote:
> Hello all,
>
> First let me appologise if this has been answered but I could not find
> an acurate answer to this interesting problem.
>
> If the following is true:
> C:\Python25\rg.py>python
> Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32
> bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more
> information.
> >>> [] == []
> True
> >>> ['-o'] == []
> False
> >>> ['-o'] == False
> False
> >>>
>
> Then why do I get the following results:
> C:\Python25\rg.py>help.py -o
> print arg ['-o']
> type(arg): <type 'list'>
> arg is True? False
> help.py version 1.0 Copyright RDEG (c) 2007
> ['-o'] is an unrecognized option.
> Progam Exit (0)
>
> <python>
> import sys
>
> _ver_ = 1.00
>
> if '-h' in sys.argv or '--help' in sys.argv:
> print
> print " help.py Version", _ver_, "Copyright RDEG (c) 2007"
> print '''
>
> Options : -h, --help -- display this message
> Progam Exit (0)'''
> sys.exit(0)
> else:
> arg = sys.argv[1:]
> print 'print arg', arg
> print 'type(arg):', type(arg)
> print 'arg is True?', arg == True
> print " help.py version", _ver_, "Copyright RDEG (c) 2007"
> print " ", arg, "is an unrecognized option."
> print " Progam Exit (0)"
> sys.exit(0)
> </python>
Does this clear things up?
import sys
_ver_ = 1.00
if '-h' in sys.argv or '--help' in sys.argv:
print
print " help.py Version", _ver_, "Copyright RDEG (c) 2007"
print '''
Options : -h, --help -- display this message
Progam Exit (0)'''
sys.exit(0)
else:
arg = sys.argv[1:]
print 'print arg', arg
print 'type(arg):', type(arg)
print 'arg is True?', arg == True
print
if arg:
print 'was True'
else:
print 'was False'
print
print " help.py version", _ver_, "Copyright RDEG (c) 2007"
print " ", arg, "is an unrecognized option."
print " Progam Exit (0)"
sys.exit(0)
## C:\python25\user>python arghhh!.py -o
## print arg ['-o']
## type(arg): <type 'list'>
## arg is True? False
##
## was True
##
## help.py version 1.0 Copyright RDEG (c) 2007
## ['-o'] is an unrecognized option.
## Progam Exit (0)
## C:\python25\user>python arghhh!.py
## print arg []
## type(arg): <type 'list'>
## arg is True? False
##
## was False
##
## help.py version 1.0 Copyright RDEG (c) 2007
## [] is an unrecognized option.
## Progam Exit (0)
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