95 行
2.5 KiB
Python
95 行
2.5 KiB
Python
from __future__ import annotations
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import contextlib
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import inspect
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import os
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import re
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from typing import Iterator
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import warnings
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@contextlib.contextmanager
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def rewrite_exception(old_name: str, new_name: str) -> Iterator[None]:
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"""
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Rewrite the message of an exception.
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"""
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try:
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yield
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except Exception as err:
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if not err.args:
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raise
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msg = str(err.args[0])
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msg = msg.replace(old_name, new_name)
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args: tuple[str, ...] = (msg,)
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if len(err.args) > 1:
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args = args + err.args[1:]
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err.args = args
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raise
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def find_stack_level() -> int:
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"""
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Find the first place in the stack that is not inside pandas
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(tests notwithstanding).
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"""
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import pandas as pd
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pkg_dir = os.path.dirname(pd.__file__)
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test_dir = os.path.join(pkg_dir, "tests")
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# https://stackoverflow.com/questions/17407119/python-inspect-stack-is-slow
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frame = inspect.currentframe()
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n = 0
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while frame:
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fname = inspect.getfile(frame)
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if fname.startswith(pkg_dir) and not fname.startswith(test_dir):
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frame = frame.f_back
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n += 1
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else:
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break
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return n
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@contextlib.contextmanager
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def rewrite_warning(
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target_message: str,
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target_category: type[Warning],
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new_message: str,
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new_category: type[Warning] | None = None,
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) -> Iterator[None]:
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"""
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Rewrite the message of a warning.
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Parameters
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----------
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target_message : str
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Warning message to match.
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target_category : Warning
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Warning type to match.
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new_message : str
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New warning message to emit.
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new_category : Warning or None, default None
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New warning type to emit. When None, will be the same as target_category.
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"""
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if new_category is None:
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new_category = target_category
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with warnings.catch_warnings(record=True) as record:
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yield
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if len(record) > 0:
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match = re.compile(target_message)
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for warning in record:
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if warning.category is target_category and re.search(
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match, str(warning.message)
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):
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category = new_category
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message: Warning | str = new_message
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else:
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category, message = warning.category, warning.message
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warnings.warn_explicit(
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message=message,
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category=category,
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filename=warning.filename,
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lineno=warning.lineno,
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)
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