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IMAP multiple FROM query builder
def build_multiple_from_query(emails: List[str]) -> str:
# IMAP query composition: (OR (OR (FROM (FROM (FROM
def gather(a: str, b: str) -> str:
if 'FROM' not in a:
return f'OR (FROM "{a}") (FROM "{b}")'
return f'OR ({a}) (FROM "{b}")'
return f'({reduce(gather, emails)})' if len(emails) > 1 else f'FROM {emails[0]}'
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