Pip install from a specific commit prompts "requirements already satisfied"

Question

I'm using `pip` and a `requirements.txt` file to handle my python packages in my virtualenv. I have a particular package I install from Github so that inside my file I have: ``` git+ssh://git@github.com/myuser/mypackage.git#egg=mypackage ``` Since I'm working on the package quite often I need to re-install it but: `pip install -r requirements.txt` gives me back ``` Requirement already satisfied (use --upgrade to upgrade)... ``` for all the packages in requirements.txt that have new versions. If I run `pip install -r requirements.txt --upgrade` it tries to upgrade all my packages (that I do NOT want) but I want to upgrade only `mypackage`. In requirements.txt I've tried to add a specific commit, like so: ``` git+ssh://git@github.com/myuser/mypackage.git@733c5b616da27cba14478c24b#egg=mypackage ``` But when I run pip again it throws: ``` Requirement already satisfied (use --upgrade to upgrade)..bla bla bla ``` QUESTION: - Is there a way to upgrade only the specific package `mypackage` po…

Accepted Answer

The reason you're getting `Requirement already satisfied` is because if you do not pass `--upgrade` or `-U` (the shorthand), the package is not modified if it is already installed.

(This part of the command has had a lot of discussion. Check out the first 4 issues here)

Is there a way to upgrade only the specific package `mypackage` possibily using the requirements.txt file?

You need to specify just `mypackage` to pip when telling it to upgrade. If you wanted to update only requests, the pip command is:

```
pip install --upgrade requests
```

Similarly, to update from your git repository, you want to do:

```
pip install --upgrade git+ssh://git@github.com/myuser/mypackage.git#egg=mypackage
```

Since it's a URL is a long thing, what I suggest you do what @daphtdazz suggests, use multiple requirements files, as follows:

requirements.txt

```
requests~=2.12.3
simplejson~=3.10.0
-r git_requirements.txt
```

git_requirements.txt

```
git+ssh://git@github.com/myuser/mypackage.git#egg=mypackage
```

Additionally, I suggest you use shell-aliases for your shell to ease the typing load.

```
alias pip_git_upgrade="pip install --upgrade -r git_requirements.txt"
```

Do I need to specify the `#egg=mypackage`?

To quote from pip's official documentation:

Any URL may use the #egg=name syntax to explicitly state the project name.

Basically, using `#egg=mypackage` is a good idea since you are making the the project name explicit.

Pip install from a specific commit prompts "requirements already satisfied"

Solution

Problem