79 lines
1.4 KiB
Markdown
79 lines
1.4 KiB
Markdown
# [glob](https://docs.python.org/3/library/glob.html) : Finding files in a directory
|
|
|
|
## Goal
|
|
We want to deal with many files in a directory. What is an easy way to get the filename in a directory?
|
|
|
|
Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
|
|
|
|
## Creating test files
|
|
|
|
```python
|
|
from pathlib import Path
|
|
|
|
Path("Testfile_1.mat").touch()
|
|
Path("Testfile_2.mat").touch()
|
|
Path("Testfile_10.mat").touch()
|
|
Path("Testfile_3.mat").touch()
|
|
```
|
|
|
|
## Using glob in a for-loop
|
|
|
|
```python
|
|
import glob
|
|
|
|
for filename in glob.glob("*.mat"):
|
|
print(filename)
|
|
```
|
|
|
|
```python console
|
|
Testfile_1.mat
|
|
Testfile_2.mat
|
|
Testfile_10.mat
|
|
Testfile_3.mat
|
|
```
|
|
|
|
## Using glob to create a list
|
|
|
|
```python
|
|
import glob
|
|
|
|
list = glob.glob("*.mat")
|
|
print(list)
|
|
```
|
|
|
|
```python console
|
|
['Testfile_1.mat', 'Testfile_2.mat', 'Testfile_10.mat', 'Testfile_3.mat']
|
|
```
|
|
|
|
### Sorting the filenames
|
|
|
|
```python
|
|
import glob
|
|
|
|
list = sorted(glob.glob("*.mat"))
|
|
print(list)
|
|
```
|
|
|
|
```python console
|
|
['Testfile_1.mat', 'Testfile_10.mat', 'Testfile_2.mat', 'Testfile_3.mat']
|
|
```
|
|
Hmmm... This result is not helpful.
|
|
|
|
### Sorting the filenames with [natsort](https://pypi.org/project/natsort/)
|
|
|
|
```shell
|
|
pip install natsort
|
|
```
|
|
|
|
```python
|
|
import glob
|
|
from natsort import natsorted
|
|
|
|
list = natsorted(glob.glob("*.mat"))
|
|
print(list)
|
|
```
|
|
|
|
```python console
|
|
['Testfile_1.mat', 'Testfile_2.mat', 'Testfile_3.mat', 'Testfile_10.mat']
|
|
```
|
|
|