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wrappers around tempfile so that you can directly use them together with pathlib module.

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temppathlib

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Temppathlib provides wrappers around tempfile so that you can directly use them together with pathlib module. We found it cumbersome to convert tempfile objects manually to pathlib.Path whenever we needed a temporary file.

Additionally, we also provide:

  • a context manager removing_tree that checks if a path exists and recursively deletes it by wrapping shutil.rmtree.
  • a context manager TmpDirIfNecessary that creates a temporary directory if no directory is given and otherwise uses a supplied directory. This is useful when you want to keep some of the temporary files for examination after the program finished. We usually specify an optional --operation_dir command-line argument to our programs and pass its value to the TmpDirIfNecessary.

If you need a more complex library to transition from string paths to pathlib.Path, have a look at ruamel.std.pathlib.

Usage

import pathlib

import temppathlib

# create a temporary directory
with temppathlib.TemporaryDirectory() as tmp_dir:
    tmp_pth = tmp_dir.path / "some-filename.txt"
    # do something else with tmp_dir ...

# create a temporary file
with temppathlib.NamedTemporaryFile() as tmp:
    # write to it
    tmp.file.write('hello'.encode())
    tmp.file.flush()

    # you can use its path.
    target_pth = pathlib.Path('/some/permanent/directory') / tmp.path.name

# create a temporary directory only if necessary
operation_dir = pathlib.Path("/some/operation/directory)
with temppathlib.TmpDirIfNecessary(path=operation_dir) as op_dir:
    # do something with the operation directory
    pth = op_dir.path / "some-file.txt"

    # operation_dir is not deleted since 'path' was specified.


with temppathlib.TmpDirIfNecessary() as op_dir:
    # do something with the operation directory
    pth = op_dir.path / "some-file.txt"

    # op_dir is deleted since 'path' argument was not specified.

# context manager to remove the path recursively
pth = pathlib.Path('/some/directory')
with temppathlib.removing_tree(pth):
    # do something in the directory ...
    pass

Installation

  • Create a virtual environment:
python3 -m venv venv3
  • Activate it:
source venv3/bin/activate
  • Install temppathlib with pip:
pip3 install temppathlib

Development

  • Check out the repository.
  • In the repository root, create the virtual environment:
python3 -m venv venv3
  • Activate the virtual environment:
source venv3/bin/activate
  • Install the development dependencies:
pip3 install -e .[dev]
  • We use tox for testing and packaging the distribution. Assuming that the virtual environment has been activated and the development dependencies have been installed, run:
tox
  • We also provide a set of pre-commit checks that lint and check code for formatting. Run them locally from an activated virtual environment with development dependencies:
./precommit.py
  • The pre-commit script can also automatically format the code:
./precommit.py  --overwrite

Versioning

We follow Semantic Versioning. The version X.Y.Z indicates:

  • X is the major version (backward-incompatible),
  • Y is the minor version (backward-compatible), and
  • Z is the patch version (backward-compatible bug fix).

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wrappers around tempfile so that you can directly use them together with pathlib module.

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