<s>[INST] This command installs Python packages

pip install -r requirements.txt

How to make sure that it will install the correct versions of the packages? [/INST] The best way to make sure that pip installs the correct versions of the packages is to check the contents of requirements.txt. The command "pip install -r requirements.txt" will install the packages and versions listed in the file, so everything is dependent on that file being correct.</s>\ <s>[INST] Thanks, but how do I make requirements.txt install certain versions for me? How can I make sure that it installs an exact version or a version that is at least > 2.0.3 for instance? [/INST] On each line of requirements.txt you can provide the package name. Optionally you may provide version pinning as well.
In order to install an exact version, you can use the `==` pin, to install a version at least 2.0.3 you can use `>=`.

Here is an example of a requirements.txt that installs a fake package from version 2.0.3 or above:

```text
fake-package >= 2.0.3
```</s>