mirror of
https://github.com/Nuitka/Nuitka.git
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Kay Hayen
92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
# Copyright 2026, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file
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"""Walrus dictionary operation corner cases."""
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def case1_pop3_unknown_key(key, **kwargs):
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"""Walrus with 'kwargs.pop(key, None)' where key hash-ability is unknown."""
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if (value := kwargs.pop(key, None)) is not None:
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return value
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return None
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def case2_pop3_union_key(flag, **kwargs):
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"""Walrus pop with runtime key being hashable string or unhashable list."""
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key = [] if flag else "x"
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if (value := kwargs.pop(key, None)) is not None:
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return value
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return None
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def case3_pop3_nested_walrus(key, **kwargs):
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"""Nested walrus pop calls to stress short-circuit ordering and side effects."""
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if (left := kwargs.pop(key, None)) is not None and (
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right := kwargs.pop("y", None)
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) is not None:
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return left, right
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return None
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def case4_setdefault3_unknown_key(key, **kwargs):
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"""Walrus with 'kwargs.setdefault(key, 123)' for unknown key hash-ability."""
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if (value := kwargs.setdefault(key, 123)) is not None:
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return value
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return None
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def case5_pop3_in_try(key, **kwargs):
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"""Walrus pop inside explicit try/except to exercise try node exception tracking."""
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try:
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if (value := kwargs.pop(key, None)) is not None:
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return value
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except TypeError:
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return "caught"
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return None
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print("case1-hit", case1_pop3_unknown_key("x", x=1))
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print("case1-miss", case1_pop3_unknown_key("x"))
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print("case2-false", case2_pop3_union_key(False, x=1))
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try:
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print("case2-true", case2_pop3_union_key(True, x=1))
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except TypeError:
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print("case2-true", "TypeError")
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print("case3-both", case3_pop3_nested_walrus("x", x=1, y=2))
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print("case3-missing", case3_pop3_nested_walrus("x", x=1))
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print("case4", case4_setdefault3_unknown_key("x"))
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print("case5-hit", case5_pop3_in_try("x", x=1))
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print("case5-miss", case5_pop3_in_try("x"))
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print("case5-caught", case5_pop3_in_try([], x=1))
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# Python tests originally created or extracted from other peoples work. The
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# parts were too small to be protected.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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