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Merge pull request #12297 from meeseeksmachine/auto-backport-of-pr-12296-on-7.x
Merge pull request #12297 from meeseeksmachine/auto-backport-of-pr-12296-on-7.x

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data.py
30 lines | 1015 B | text/x-python | PythonLexer
# encoding: utf-8
"""Utilities for working with data structures like lists, dicts and tuples.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
def uniq_stable(elems):
"""uniq_stable(elems) -> list
Return from an iterable, a list of all the unique elements in the input,
but maintaining the order in which they first appear.
Note: All elements in the input must be hashable for this routine
to work, as it internally uses a set for efficiency reasons.
"""
seen = set()
return [x for x in elems if x not in seen and not seen.add(x)]
def chop(seq, size):
"""Chop a sequence into chunks of the given size."""
return [seq[i:i+size] for i in range(0,len(seq),size)]