common.py
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common.py
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	# Copyright (C) 2019-2020 The Software Heritage developers
	# See the AUTHORS file at the top-level directory of this distribution
	# License: GNU General Public License version 3, or any later version
	# See top-level LICENSE file for more information


	import hashlib
	from typing import Any, Dict, Tuple

	TOKEN_BEGIN = -(2 ** 63)
	"""Minimum value returned by the CQL function token()"""
	TOKEN_END = 2 ** 63 - 1
	"""Maximum value returned by the CQL function token()"""


	def hash_url(url: str) -> bytes:
	return hashlib.sha1(url.encode("ascii")).digest()


	def remove_keys(d: Dict[str, Any], keys: Tuple[str, ...]) -> Dict[str, Any]:
	return {k: v for (k, v) in d.items() if k not in keys}