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+--- Thread: How to iterate over command line arguments? (/thread-14209.html)
How to iterate over command line arguments? - zBernie - Nov-20-2018
How do you iterate over arguments passed to a script? I'm trying to use sys.argv as shown below, which does not work.
-Thanks
print 'Number of arguments:', len(sys.argv), 'arguments.'
print 'Argument List:', str(sys.argv)
for jpgfile in str(sys.argv):
print(jpgfile)
RE: How to iterate over command line arguments? - ichabod801 - Nov-20-2018
How does it not work? It works for me, although note that looping over a string loops over each character in the string. You did import sys, right? It's not in your code.
RE: How to iterate over command line arguments? - zBernie - Nov-20-2018
(Nov-20-2018, 03:20 AM)ichabod801 Wrote: How does it not work? It works for me, although note that looping over a string loops over each character in the string. You did import sys, right? It's not in your code.
Here is what I got for output. How do I print each individual argument?
Output:im-datestamp.py aaa bbb
Number of arguments: 3 arguments.
Argument List: ['./im-datestamp.py', 'aaa', 'bbb']
[
'
.
/
i
m
-
d
a
t
e
s
t
a
m
p
.
p
y
'
,
'
a
a
a
'
,
'
b
b
b
'
]RE: How to iterate over command line arguments? - wavic - Nov-20-2018
>>> type(sys.argv) <class 'list'>Iterating over a string returns each letter.
for element in sys.argv: should do it.
RE: How to iterate over command line arguments? - zBernie - Nov-23-2018
(Nov-20-2018, 07:01 AM)wavic Wrote:>>> type(sys.argv) <class 'list'>Iterating over a string returns each letter.for element in sys.argv:should do it.
Thanks, I wound up using this which eliminates the script name in [0]:
for jpgfile in sys.argv[1:]:
RE: How to iterate over command line arguments? - wavic - Nov-23-2018
Exactly!
Look at the argparse module. It allows much more flexibility and control over the arguments.