semvec/pypi-packages huggingface dataset:
filefinder 1.3.1
Find files using a simple syntax.
Requires Python: >=3.10


# FileFinder

> Find files using a simple syntax.

<div align="left">

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</div>

FileFinder allows to specify the structure of filenames using a simple syntax.
Parts of the file structure varying from file to file are indicated within named
groups, similarly to a regular expression. Once setup, it can:

- Find corresponding files in a directory (and sub-directories)
- Parse values from the filenames
- Select only filenames with specific values or which pass filter functions
- Generate filenames

## Quick examples

The following example will find all files with the structure ``Data/param_[parameter]/[year]/Temperature_[date].nc``:
``` python
finder = Finder('/.../Data', 'param_%(parameter:fmt=.1f)/%(Y)/Temperature_%(Y)%(m)%(d).nc')
files = finder.get_files()
```

We can also select only some files, for instance only in january:
``` python
finder.fix_group('m', 1)
files = finder.get_files()
```

Or apply more complicated filters:
``` python
finder.fix_by_filters("m", lambda m: m % 2 == 0)
```

We can retrieve values from found files:
``` python
filename, matches = finder.files[0]
parameter = matches["parameter"]
# the date as a datetime object
date = matches.get_date()
```

And we can generate a filename with a set of parameters:
``` python
finder.make_filename(parameter=0.5, Y=2000, m=1, d=1)
# Specifying the month is optional since we already fixed it to 1.
```

Date as a special citizen: the "date" group name is (by default, but this can be
deactivated) considered special in some operation, like fixing multiple groups
from a datetime object, or having a filter opering on a full date:
``` python
finder.fix_group("date", datetime(2018, 2, 1))
finder.fix_by_filter("date", lambda d: d > datetime(2018, 2, 1))
```

## Requirements

Python >= 3.10

## Installation

From pip:
``` sh
pip install filefinder
```

From source:
``` sh
git clone https://github.com/Descanonge/filefinder.git
cd filefinder
pip install -e .
```
or
``` sh
pip install -e https://github.com/Descanonge/filefinder.git#egg=filefinder
```

## Documentation

Documentation is available at [filefinder.readthedocs.io](https://filefinder.readthedocs.io).