1from typing import NamedTuple 2 3LOOKUP_DEBUG_INFO_KEY = "com.github.fonttools.feaLib" 4LOOKUP_DEBUG_ENV_VAR = "FONTTOOLS_LOOKUP_DEBUGGING" 5 6class LookupDebugInfo(NamedTuple): 7 """Information about where a lookup came from, to be embedded in a font""" 8 9 location: str 10 name: str 11 feature: list 12