Update packages in a requirements.txt file to latest versions.

dependency-manager, pip, python
pip install pur==7.0.0


Tests Coverage Version Supported Python Versions


Update the packages in a requirements.txt file.

Purring Cat


pip install pur


Give pur your requirements.txt file and it updates all your packages to the latest versions.

For example, given a requirements.txt file:


Running pur on that file updates the packages to current latest versions:

$ pur -r requirements.txt
Updated flask: 0.9 -> 1.0.2
Updated sqlalchemy: 0.9.10 -> 1.2.8
Updated alembic: 0.8.4 -> 0.9.9
All requirements up-to-date.

Pur never modifies your environment or installed packages, it only modifies your requirements.txt file.

You can also use Pur directly from Python:

$ python
Python 3.6.1
>>> from pur import update_requirements
>>> print([x[0]['message'] for x in update_requirements(input_file='requirements.txt').values()])
['Updated flask: 0.9 -> 1.0.2', 'Updated sqlalchemy: 0.9.10 -> 1.2.8', 'Updated alembic: 0.8.4 -> 0.9.9']
>>> print(open('requirements.txt').read())


-r, --requirement PATH
  The requirements.txt file to update; Defaults to using requirements.txt from the current directory if it exist.
-o, --output PATH
  Output updated packages to this file; Defaults to overwriting the input requirements.txt file.
--interactive Interactively prompts before updating each package.
-f, --force Force updating packages even when a package has no version specified in the input requirements.txt file.
-d, --dry-run Output changes to STDOUT instead of overwriting the requirements.txt file.
  When running with --dry-run, only output packages with updates, not packages that are already the latest.
-n, --no-recursive
  Prevents updating nested requirements files.
--skip TEXT Comma separated list of packages to skip updating.
--skip-gt Skip updating packages using > or >= spec, to allow specifying minimum supported versions of packages.
--index-url TEXT
  Base URL of the Python Package Index. Can be provided multiple times for extra index urls.
--cert PATH Path to PEM-encoded CA certificate bundle. If provided, overrides the default.
  Disable verifying the server's TLS certificate.
--only TEXT Comma separated list of packages. Only these packages will be updated.
--minor TEXT Comma separated list of packages to only update minor versions, never major. Use "*" to limit every package to minor version updates.
--patch TEXT Comma separated list of packages to only update patch versions, never major or minor. Use "*" to limit every package to patch version updates.
--pre TEXT Comma separated list of packages to allow updating to pre-release versions. Use "*" to allow all packages to be updated to pre-release versions. By default packages are only updated to stable versions.
-z, --nonzero-exit-code
  Exit with status 1 when some packages were updated, 0 when no packages updated, or a number greater than 1 when there was an error. By default, exit status 0 is used unless there was an error irregardless of whether packages were or not updated.
--version Show the version and exit.
--help Show this message and exit.


Before contributing a pull request, make sure tests pass:

virtualenv venv
. venv/bin/activate
pip install tox

Many thanks to all contributors!