# Python dotenv issue

System used for issue:
- WSL2 on Windows 11 Enterprise with Ubuntu 22.04

Requirements:
- `conda` version `24.9.2` (installed via `miniconda`)
- `uv` version `0.8.9`

## Description of the issue:
When running a python script that uses the `dotenv` package to load environment variables, 
depending on the python-dotenv version and using `uv` or not the `.env`-file is not found through `load_dotenv()`.


## Definition of the folder and files

Folder scructure should be as follows: 
```plaintext
├── dev-environment-with-pip.yml
├── dev-environment.yml
├── .env
└── show_dotenv_issue.py
```
The files should contain the following content:

`dev-environment.yml`
```yaml
name: python_dotenv_issue
channels:
  - conda-forge
  - defaults
dependencies:
  - python=3.11.13
```

`dev-environment-with-pip.yml`
```yaml
name: python_dotenv_issue_with_pip
channels:
  - conda-forge
  - defaults
dependencies:
  - python=3.11.13
  - pip=25.2
```

`.env`
```plaintext
MY_VAR1=my_value1
MY_VAR2=my_value2
```

`show_dotenv_issue.py`
```python
import os

from dotenv import load_dotenv

load_dotenv()


if __name__ == "__main__":
    print(os.getenv("MY_VAR1"))
    print(os.getenv("MY_VAR2"))
```

## Observations

There are three situations to point out:

### 1. Install python-dotenv==1.1.1 with uv pip install without pip==25.2 (does not work)

Run:
``` 
conda deactivate
conda env create -f dev-environment.yml
conda activate python_dotenv_issue
uv pip install python-dotenv==1.1.1
python -m show_dotenv_issue
```

You expect that the script prints
``` 
my_value1
my_value2
```

but it prints:
``` 
None
None
```

### 2. Install python-dotenv==1.1.1 with pip install (works)

Run:
``` 
conda deactivate
conda env create -f dev-environment-with-pip.yml
conda activate python_dotenv_issue_with_pip
pip install python-dotenv==1.1.1
python -m show_dotenv_issue
```

The script prints as expected:
``` 
my_value1
my_value2
```

### 3. Install python-dotenv==1.1.0 with uv pip install (works)

Remove the earlier conda env python_dotenv_issue:
```  
conda deactivate
conda env remove -n python_dotenv_issue 
```

Run:
``` 
conda env create -f dev-environment.yml
conda activate python_dotenv_issue
uv pip install python-dotenv==1.1.0
python -m show_dotenv_issue
```

The script prints as expected:
``` 
my_value1
my_value2
```


## Conclusion
There seems to be an issue with `python-dotenv==1.1.1` in combination with `uv pip install` when `pip` is not installed.
As there is no problem with `python-dotenv==1.1.0`, we suspect an issue in version 1.1.1. However, we have not been able 
to point out what exactly could cause this.