Message201628
Indeed, you can see in the original posting that the \ is already gone from the dollar in sys.argv, so argparse has nothing to do with it.
And it is indeed the shell doing the unescaping:
rdmurray@session:~>cat test.sh
#!/bin/bash
echo "$@"
rdmurray@session:~>bash test.sh "abc [\t] \$"
abc [\t] $
rdmurray@session:~>bash test.sh 'abc [\t] \$'
abc [\t] \$
rdmurray@session:~>bash test.sh 'abc [\t] \$'
abc [\t] \$
rdmurray@session:~>bash test.sh "'abc [\t] \$'"
'abc [\t] $'
rdmurray@session:~>bash test.sh "'abc [\t] \\$'"
'abc [\t] \$'
rdmurray@session:~>bash test.sh "'abc [\t] \\$foo'"
'abc [\t] \'
rdmurray@session:~>bash test.sh '"abc [\t] \\\$foo"'
"abc [\t] \\\$foo"
rdmurray@session:~>bash test.sh '"abc [\t] \$foo"'
"abc [\t] \$foo"
The shell treats $ specially because $ has a special meaning inside double quotes (variable substitution), so it presumably unescapes it as part of the double quote string processing. You have to escape both the backslash and the $ if you want a literal '\$' to wind up in argv, when the outer level of quoting is double quotes. |
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Date |
User |
Action |
Args |
2013-10-29 12:17:04 | r.david.murray | set | recipients:
+ r.david.murray, pitrou, ezio.melotti, telmich |
2013-10-29 12:17:04 | r.david.murray | set | messageid: <1383049024.32.0.770047348979.issue19430@psf.upfronthosting.co.za> |
2013-10-29 12:17:04 | r.david.murray | link | issue19430 messages |
2013-10-29 12:17:04 | r.david.murray | create | |
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