86cfbed2-825d-429f-8146-33982d160e94
prompter
This command installs Python packages

pip install -r requirements.txt

How to make sure that it will install the correct versions of the packages?
6b7452ef-f184-41e6-bcd2-d82f8d00fde2
86cfbed2-825d-429f-8146-33982d160e94
assistant
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.
c0d62f71-0291-4d18-b8d6-56f0d820892f
6b7452ef-f184-41e6-bcd2-d82f8d00fde2
prompter
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?
2d94db98-0036-44d4-ac38-c6a79d803d8d
c0d62f71-0291-4d18-b8d6-56f0d820892f
assistant
To install the exact version of a package, in your requirements.txt, specify the version

requirements.txt
```
package_name==2.0.3
```

To install a version > 2.03
```
package_name==2.0.3
```

The comparison operator determines the kind of version clause:
~=: Compatible release clause
==: Version matching clause
!=: Version exclusion clause
<=, >=: Inclusive ordered comparison clause
<, >: Exclusive ordered comparison clause
===: Arbitrary equality clause.
The comma (",") is equivalent to a logical and operator: a candidate version must match all given version clauses in order to match the specifier as a whole.