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I'm new to Python Flask. Here is my terminal commands as per official flask doc.

Official flask link: https://flask.palletsprojects.com/en/stable/installation/

WORK/2025/Python [08:45]❯ cd FlaskIntro/ 2025/Python/FlaskIntro [08:45]❯ python3 -m venv .venv 2025/Python/FlaskIntro [08:46]❯ . .venv/bin/activate .venv/bin/activate (line 40): “case” builtin not inside of switch block case "$(uname)" in ^~~^ from sourcing file .venv/bin/activate .: Error while reading file '.venv/bin/activate' 2025/Python/FlaskIntro [08:46]❯ python --version Python 3.13.1 2025/Python/FlaskIntro [08:46]❯ python3 --version Python 3.13.1 2025/Python/FlaskIntro [08:46]❯

SOLUTION: ❯ . .venv/bin/activate.fish

I tried all the files and found that I was using fish shell.

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2025/Python/FlaskIntro [09:20]❯ python3 -m venv .venv 2025/Python/FlaskIntro [09:20]❯ . .venv/bin/activate.fish 2025/Python/FlaskIntro [🐍 v3.13.1(.venv)] [09:21]❯ pip install Flask Collecting Flask Downloading flask-3.1.0-py3-none-any.whl.metadata (2.7 kB)

I tried all the files in venv/bin folder and the above command worked.

Cause of the problem: I was using fish shell.

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> fish shell. . thank you 🫶🫶🫶

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