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annotate lemuriformes/path.py @ 16:9b1bb9eee962

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misc functions related to filesystem paths
author Jeff Hammel <k0scist@gmail.com>
date Sun, 10 Dec 2017 17:19:30 -0800
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1 """
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2 functions related to paths
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3 """
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4
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5 import shutil
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6 import tempfile
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7
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8
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9 def ensure_dir(path):
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10 """ensures `path` is a directory"""
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11
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12 if os.path.exists(path):
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13 assert os.path.isdir(path)
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14 else:
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15 os.makedirs(path)
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16 return path
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18
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19 class TempDir(object):
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20 """temporary directory context manager"""
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21 # For inspiration see
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22 # https://stackoverflow.com/questions/19296146/tempfile-temporarydirectory-context-manager-in-python-2-7
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23
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24 def __init__(self):
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25 self.tmpdir = None
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26
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27 def __enter__(self):
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28 self.tmpdir = tempfile.mkdtemp()
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29 return self.tmpdir
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30
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31 def __exit__(self, *args):
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32 if not self.tmpdir:
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33 return
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34 shutil.rmtree(self.tmpdir, ignore_errors=True)
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35 self.tmpdir = None