Expand system variables Unix style
Project description
expandvars
Expand system variables Unix style
Inspiration
This module is inspired by GNU bash's variable expansion features. It can be used as an alternative to Python's os.path.expandvars function.
A good use case is reading config files with the flexibility of reading values from environment variables using advanced features like returning a default value if some variable is not defined. For example:
[default]
my_secret_access_code = "${ACCESS_CODE:-default_access_code}"
NOTE: Although it copies most of the common behaviours, it doesn't follow it strictly. For example, it doesn't work with arrays.
Usage
from expandvars import expandvars
print(expandvars("$PATH:$HOME/bin:${SOME_UNDEFINED_PATH:-/custom/path}"))
# /bin:/sbin:/usr/bin:/usr/sbin:/home/you/bin:/custom/path
Examples
For now, refer to the test cases to see how it behaves.
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