Pyimgren 0.9.2

Description:

pyimgren 0.9.2

pyimgren
A python module to rename images according to their exif tags.
Current status
This package package is distributed in PyPI since version 0.1.0. It can be used by end users, but should be considered at beta quality because it still lacks extensive testing. Its full source is available from GitHUB.
Goals
Digital cameras name their pictures in a sequential manner. When you want to put pictures from several cameras in the same folder, they will be sorted by camera instead of by picture date and time.
Even if we can find here and there programs that allow for batch renaming of such pictures, I could not find a portable Python module for that. So the goals of this project are:

few dependencies: a Python 3 (tested for >= 3.3)
few additional module requirements: only piexif and i18nparse are required at installation time
portability: this is a pure Python package and is tested with Travis-CI (linux) and AppVeyor (Windows) for versions 3.4 to 3.8.

Localization
The package supports gettext type localization, and provides a French translation.
Usage:
As a Python module
The pyimgren package contains one single class Renamer with two public methods: rename to rename picture files according to their exif date, and back to rename them back to their original names.
A Renamer is used to rename image names provided by a camera
(commonly IMGxxxxx.JPG or DSCFyyyy.JPG into a name based on the time
when the photography had been taken (as smartphones do). That time is
extracted from the exif tag of the picture. No rename occurs if the
picture contains no exif time. Optionally, a number of minutes to add to
the exif time can be given to process images from a camera that would
have a wrong time..
A file named names.log is created in the folder to store the new names
and the original ones, in order to be able to rename them back.
You create a Renamer with:
renamer = Renamer(folder, src_mask = "DSCF*.jpg",
dst_mask = "%Y%m%d_%H%M%S",
ext_mask = ".jpg",
ref_file = "names.log",
delta = 0.0,
debug = False,
dummy = False)

Parameters:

folder: the default folder where pictures will be renamed
src_mask: a pattern to select the files to be renamed (default
"DSCF*.jpg")
dst_mask: a format containing strftime formatting directives, that
will be used for the new name of a picture (default
"%Y%m%d_%H%M%S")
ext_mask: the extension of the new name (default ".jpg")
ref_file: the name of a file that will remember the old names
(default "names.log")
delta: a (floating point) number of minutes to add to the exif
tag time (default 0.0)
debug : a boolean flag that will cause a line to be printed for
each rename when true (default False)
dummy : a boolean flag that will cause a "dry run", meaning that
the folder will be scanned, and debug info eventually printed
but no file will be renamed (default False)

Typical use:
from pyimgren import Renamer
...
conv = Renamer(path)
conv.rename() # to convert to "date" names
...
conv.back() # if you want to revert to original names

As a script
The pip installation install a pyimgren script (pyimgren.exe on Windows) in the Scripts directory. It can then be directly used (provided the Script directory be in the path) with the following syntax:
usage: pyimgren [-h] [-v] [--folder FOLDER] [-s SRC_MASK] [-d DST_MASK]
[-e EXT_MASK] [-r REF_FILE] [-x delta] [-D] [-X]
{rename,back,merge} ...

Rename pictures according to their exif timestamp

positional arguments:
{rename,back,merge} sub-commands
rename rename files by using their exif timestamp
back rename files back to their original name
merge merge files from a different folder

optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
--folder FOLDER, -f FOLDER
folder containing files to rename
-s SRC_MASK, --src_mask SRC_MASK
pattern to select the files to rename
-d DST_MASK, --dst_mask DST_MASK
format for the new file name
-e EXT_MASK, --ext EXT_MASK
extension for the new file name
-r REF_FILE, --ref_file REF_FILE
a file to remember the old names
-x delta, --delta delta
minutes to add to the exif tag time
-D, --debug print a line per rename
-X, --dry_run process normally except no rename occurs

The sub commands have the following syntax:
usage: pyimgren [global_options ...] {back|rename} [-h] [files [files ...]]

positional arguments:
files files to process (default: content of ref_file)

optional arguments:
-h, --help show this help message and exit

and
usage: pyimgren [global_options ...] merge [-h] folder [files [files ...]]

positional arguments:
folder folder from where merge picture files
files files to process (default: src_mask)

optional arguments:
-h, --help show this help message and exit

usage: pyimgren [-h] [-v] [-b] [-s SRC_MASK] [-d DST_MASK] [-e EXT_MASK]
[-r REF_FILE] [-x delta] [-D] [-X]
folder [files [files ...]]

Rename pictures according to their exif timestamp

positional arguments:
folder folder containing files to rename
files files of sub folders to process (optional)

optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-b, --back restore original names
-s SRC_MASK, --src_mask SRC_MASK
pattern to select the files to rename
-d DST_MASK, --dst_mask DST_MASK
format for the new file name
-e EXT_MASK, --ext EXT_MASK
extension for the new file name
-r REF_FILE, --ref_file REF_FILE
a file to remember the old names
-x delta, --delta delta
minutes to add to the exif tag time
-D, --debug print a line per rename
-X, --dry_run process normally except no rename occurs

As a module
It can be use as a Python module, which allows to use it in Windows even if the Scripts directory is not in the path thanks to the py launcher with same syntax as the script:
usage: pyimgren [-h] [-v] [--folder FOLDER] [-s SRC_MASK] [-d DST_MASK]
[-e EXT_MASK] [-r REF_FILE] [-x delta] [-D] [-X]
{rename,back,merge} ...

or when using the Windows launcher py -m pyimgren ...
Installing
End user installation
With pip: pip install pyimgren.
Developper installation
If you want to contribute or integrate pyimgren in your own code, you should get a copy of the full tree from GitHUB:
git clone https://github.com/s-ball/pyimgren [your_working_copy_folder]

Running the tests
As the project intends to be PyPI compatible, you can simply run tests from the main folder with:
python setup.py test

The integration tests depend on pyfakefs, which is automatically intalled from PyPI when you run python setup.py test. But it is not require for running pyimgren, nor installed by pip install pyimgren.
Contributing
As this project is developped on my free time, I cannot guarantee very fast feedbacks. Anyway, I shall be glad to receive issues or pull requests on GitHUB.
Versioning
This project uses a standard Major.Minor.Patch versioning pattern. Inside a major version, public API stability is expected (at least after 1.0.0 version will be published).
License
This project is licensed under the MIT License - see the LICENSE.txt file for details
Acknowledgments

The hard job of exif data processing was already done in piexif
The excellent pyfakefs, allows integration tests to run on a fake file system

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