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kissgyorgy/prefixed_string_template.py

Created July 20, 2022 00:32
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Python: use prefix in a string.Template
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prefixed_string_template.py
from string import Template
class EnvTemplate(Template):
"""Substitute variables regularly, but environment variables need "env." prefix,
and only with the braced syntax.
For example: ${env.HOME} works, but $env.HOME does nothing.
"""
braceidpattern = rf"(?:env\.)?{Template.idpattern}"
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