1from typing import NamedTuple 2 3LOOKUP_DEBUG_INFO_KEY = "com.github.fonttools.feaLib" 4LOOKUP_DEBUG_ENV_VAR = "FONTTOOLS_LOOKUP_DEBUGGING" 5 6 7class LookupDebugInfo(NamedTuple): 8 """Information about where a lookup came from, to be embedded in a font""" 9 10 location: str 11 name: str 12 feature: list 13