1# Copyright 2018 The TensorFlow Authors. All Rights Reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14# ============================================================================== 15# pylint: disable=g-import-not-at-top 16"""Utilities related to disk I/O.""" 17 18import os 19 20 21def path_to_string(path): 22 """Convert `PathLike` objects to their string representation. 23 24 If given a non-string typed path object, converts it to its string 25 representation. 26 27 If the object passed to `path` is not among the above, then it is 28 returned unchanged. This allows e.g. passthrough of file objects 29 through this function. 30 31 Args: 32 path: `PathLike` object that represents a path 33 34 Returns: 35 A string representation of the path argument, if Python support exists. 36 """ 37 if isinstance(path, os.PathLike): 38 return os.fspath(path) 39 return path 40 41 42def ask_to_proceed_with_overwrite(filepath): 43 """Produces a prompt asking about overwriting a file. 44 45 Args: 46 filepath: the path to the file to be overwritten. 47 48 Returns: 49 True if we can proceed with overwrite, False otherwise. 50 """ 51 overwrite = input('[WARNING] %s already exists - overwrite? ' 52 '[y/n]' % (filepath)).strip().lower() 53 while overwrite not in ('y', 'n'): 54 overwrite = input('Enter "y" (overwrite) or "n" ' 55 '(cancel).').strip().lower() 56 if overwrite == 'n': 57 return False 58 print('[TIP] Next time specify overwrite=True!') 59 return True 60