def regexSearch(render, s, pattern, flags = 0):
"""
Jinja2 global: Search a string for regular expression pattern.
This function internally runs re.search().
:param s: String where to be searched in.
:type s: str
:param pattern: Regular expression pattern to be matched.
:type pattern: str
:param flags: Flags to be passed to re.search().
:type flags: int
:return: A matching object on success, else None.
:rtype: ``re.MatchObject``
"""
return re.search(pattern, s, flags)
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