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# 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.
#-----------------------------------------------------------------------------
import warnings
from collections.abc import Iterable, Sequence
from typing import TypeVar
T = TypeVar("T")
def uniq_stable(elems: Iterable[T]) -> list[T]:
"""uniq_stable(elems) -> list
.. deprecated:: 9.8
This function is deprecated and will be removed in a future version.
It is not used within IPython and was never part of the public API.
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.
"""
warnings.warn(
"uniq_stable is deprecated since IPython 9.8 and will be removed in a future version. "
"It was never part of the public API.",
DeprecationWarning,
stacklevel=2,
)
seen: set[T] = set()
result: list[T] = []
for x in elems:
if x not in seen:
seen.add(x)
result.append(x)
return result
def chop(seq: Sequence[T], size: int) -> list[Sequence[T]]:
"""Chop a sequence into chunks of the given size."""
return [seq[i : i + size] for i in range(0, len(seq), size)]
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