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Update README with double dash scenario to escape named arguments #898

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Apr 22, 2023
Merged

Update README with double dash scenario to escape named arguments #898

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48b952d
Update README with double dash scenario to escape named arguments
peleccom Oct 6, 2022
767f612
Slight reformat
uranusjr Oct 7, 2022
2528603
Update README.md
dukecat0 Apr 22, 2023
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29 changes: 29 additions & 0 deletions README.md
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Expand Up @@ -225,6 +225,35 @@ Any arguments after the application name will be passed directly to the applicat

```

Sometimes pipx can consume arguments provided for the application:

```
> pipx run pycowsay --py

usage: pipx run [-h] [--no-cache] [--pypackages] [--spec SPEC] [--verbose] [--python PYTHON]
[--system-site-packages] [--index-url INDEX_URL] [--editable] [--pip-args PIP_ARGS]
app ...
pipx run: error: ambiguous option: --py could match --pypackages, --python
```

To prevent this put double dash `--` before APP. It will make pipx to forward the arguments to the right verbatim to the application:

```
> pipx run -- pycowsay --py


----
< --py >
----
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||


```

Re-running the same app is quick because pipx caches Virtual Environments on a per-app basis. The caches only last a few days, and when they expire, pipx will again use the latest version of the package. This way you can be sure you're always running a new version of the package without having to manually upgrade.

If the app name does not match that package name, you can use the `--spec` argument to specify the package to install and app to run separately:
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