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programming [2017/08/24 09:24] dlicious Initial page with Python warning configuration |
programming [2018/04/09 11:11] (current) dlicious Added section on indirect variables in POSIX shells |
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| warnings.warn("Something isn't quite right, but we don't have to abort over it.") | warnings.warn("Something isn't quite right, but we don't have to abort over it.") | ||
| warnings.warn("Something isn't quite right, but we don't have to abort over it.", UserWarning, stacklevel=1) | warnings.warn("Something isn't quite right, but we don't have to abort over it.", UserWarning, stacklevel=1) | ||
| + | </code> | ||
| + | |||
| + | ====== Indirect variables in shell scripts ====== | ||
| + | |||
| + | Normally, you'd use an associative array for this (including BASH) instead of manually embedding a variable in another variable, but this solution works in POSIX environments like regular Bourne shell (and BASH's emulation of it): | ||
| + | |||
| + | <code bash> | ||
| + | favorite_color_joe=gold | ||
| + | favorite_color_jane=blue | ||
| + | |||
| + | person=${1} | ||
| + | |||
| + | target_interface=`eval echo \$favorite_color_${person}` | ||
| </code> | </code> | ||