all Python 3configparserexception

configparser.InterpolationMissingOptionError

exceptions

Raised when a %(name)s or ${section:option} substitution refers to an option that does not exist.

Syntax

except configparser.InterpolationMissingOptionError as e: e.reference

BasicInterpolation looks only in the current section and in [DEFAULT]: %(root)s from a sibling section is not found even if it exists there; that needs ExtendedInterpolation. The reference attribute names the key that was not found.

Examples

import configparser
cfg = configparser.ConfigParser()
cfg.read_string("[common]\nroot = /srv\n[app]\nlogs = %(root)s/logs\n")
try:
    cfg.get("app", "logs")
except configparser.InterpolationMissingOptionError as e:
    print(e.reference)  # → root — в соседнюю секцию %(...)s не заглядывает

See also

Common errors

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