Transcrypt版本降级失败：卸载重装后仍显示2.2.0，如何降级至2.1.0？

I’ve run into this exact issue before—usually it boils down to conflicting global vs. local installations, leftover executable files, or pip cache serving the old version. Let’s walk through the steps to fix this properly:

Step 1: Locate where your current Transcrypt is running from #

First, figure out which executable your shell is picking up. Run:

• On Linux/macOS: which transcrypt
• On Windows (Command Prompt): where transcrypt
• On Windows (PowerShell): Get-Command transcrypt

Note down the full path shown—this is the binary that’s still reporting 2.2.0, and we’ll need to clean it up.

Step 2: Uninstall all instances of Transcrypt #

1. Uninstall via pip (cover both global and local environments):

   • If you use a virtual environment for your project, activate it first, then run:

     pip uninstall -y transcrypt
     

   • For global system-wide installations, run:

     pip uninstall -y transcrypt
     

     (Add sudo at the start if you installed it system-wide on Linux/macOS.)

2. Manually delete leftover executable files:
   If the path from Step 1 isn’t inside your project’s virtual environment or pip’s standard directories, delete that file directly:

   • Linux/macOS: rm /path/to/transcrypt (replace with the path you noted)
   • Windows: Delete the .exe file from the path shown.

Step 3: Clear pip’s cache #

Pip might still have the 2.2.0 package cached, which can cause accidental reinstalls of the wrong version. Clear the cache with:

pip cache purge

Step 4: Install Transcrypt 2.1.0 specifically #

Make sure you’re in your project’s virtual environment (this is highly recommended to avoid future dependency conflicts), then run:

pip install transcrypt==2.1.0

Step 5: Verify the downgrade #

Run transcrypt --version again. If it still shows 2.2.0, try running the executable directly from your project’s virtual environment to confirm:

• Linux/macOS: ./venv/bin/transcrypt --version (adjust venv to your virtual environment name)
• Windows: .\venv\Scripts\transcrypt.exe --version

If this direct call shows 2.1.0, your shell’s PATH is prioritizing the global Transcrypt over your local one. Ensure your virtual environment’s bin/Scripts directory is at the top of your PATH when the environment is activated.

Bonus: If you installed via a system package manager #

If you originally installed Transcrypt using brew (macOS) or another system package manager, uninstall it from there first too:

brew uninstall transcrypt

Then proceed with the pip installation steps above.

内容的提问来源于stack exchange，提问作者pma133