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41 lines
962 B
41 lines
962 B
7 months ago
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# Copyright 2015 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import collections
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def checksum_counts(checksums):
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"""
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@param checksums: list of checksums, each checksum in a 4-tuple of ints
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@returns a dictionary of checksums as keys mapped to their respective
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count of occurance in the list.
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"""
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counts = {}
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for checksum in checksums:
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if checksum in counts:
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counts[checksum] += 1
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else:
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counts[checksum] = 1
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return counts
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def checksum_indices(checksums):
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"""
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@param checksums: list of checksums.
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@returns an OrderedDict containing checksums as keys and their respective
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first-occurance indices as values
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"""
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d = collections.OrderedDict()
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for i, checksum in enumerate(checksums):
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if checksum not in d:
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d[checksum] = i
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return d
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