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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import pathlib
import sys
def _is_path_like(path):
# PEP519 filesystem path protocol is available from python 3.6, so pathlib
# doesn't implement __fspath__ for earlier versions
return (isinstance(path, str) or
hasattr(path, '__fspath__') or
isinstance(path, pathlib.Path))
def _ensure_path(path):
if isinstance(path, pathlib.Path):
return path
else:
return pathlib.Path(_stringify_path(path))
def _stringify_path(path):
"""
Convert *path* to a string or unicode path if possible.
"""
if isinstance(path, str):
return path
# checking whether path implements the filesystem protocol
try:
return path.__fspath__() # new in python 3.6
except AttributeError:
# fallback pathlib ckeck for earlier python versions than 3.6
if isinstance(path, pathlib.Path):
return str(path)
raise TypeError("not a path-like object")
def _import_pandas():
# ARROW-13425: avoid importing PyArrow from Pandas
sys.modules['pyarrow'] = None
import pandas as pd
return pd
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