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Created on 2015-07-03 09:32 by Jak, last changed 2022-04-11 14:58 by admin. This issue is now closed.
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| msg246153 - (view) | Author: Jak (Jak) | Date: 2015-07-03 09:32 | |
The getopt library has, what I assume is, some unexpected behaviour when adding extra text to command line parameter that getopt expects as a flag.
Using input parameters a, b and c as an example below, where a and b both take values and c is a flag.
Example code:
options, remainders = getopt.getopt(sys.argv[1:], "a:b:c")
Normal output is given when you supply sensible values for a, b and c:
Input: -a value1 -b value2 -c
Output: [('-a', 'value1'), ('-b', 'value2'), ('-c', '')]
Unexpected output happens when you give extra text after the '-c' that begins with a letter matching that of a previous parameter:
Input -a value1 -b value2 -cbanana
Output: [('-a', 'value1'), ('-b', 'value2'), ('-c', ''), ('-b', 'anana')]
Looping through the output variables, as most example programs do, results in the value for '-b' being over-written.
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| msg246181 - (view) | Author: R. David Murray (r.david.murray) *  |
Date: 2015-07-03 14:33 | |
This behavior is correct: rdmurray@session:~>getopt a:b:c -a value1 -b value2 -cbanana -a value1 -b value2 -c -b anana -- |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:18 | admin | set | github: 68744 |
| 2015-07-03 14:33:46 | r.david.murray | set | status: open -> closed nosy: + r.david.murray messages: + msg246181 resolution: not a bug stage: resolved |
| 2015-07-03 09:32:15 | Jak | create | |