Johnnydep: Python Dependency Tree Viewer

1.20.6 · active · verified Thu Apr 16

Johnnydep is a Python tool designed to display the dependency tree of Python distribution packages in a clear, tree-like structure. It helps developers efficiently manage project dependencies by visualizing all required components and their version constraints. The current version is 1.20.6, and it sees active development with frequent minor releases to support new `pip` versions and fix regressions.

Common errors

```
johnnydep: command not found
```
cause The `johnnydep` command-line tool is not installed, or your system's PATH environment variable does not include the directory where `pip` installs scripts.

fix Ensure `johnnydep` is installed by running `pip install johnnydep`. If it's installed but still not found, confirm your `pip` script directory is in your PATH. On some systems, you might need to run `python -m johnnydep` instead of just `johnnydep`.
```
TypeError: 'str' object is not callable
```
cause This error can occur in programmatic usage if your code expects `JohnnyDist.console_scripts` (or similar entry point attributes) to be a string that can be called or split, but it is now a list.

fix Update your code to treat `JohnnyDist.console_scripts` as a list of strings, as its behavior changed in version 1.20.0. Iterate over the list or use `','.join(my_dist.console_scripts)` if you need a string representation.
```
packaging.version.InvalidVersion: Invalid version: '22.0.post0' (or similar errors during metadata parsing)
```
cause This specific error, or similar metadata parsing issues, can occur if an incompatible `packaging` library version is installed, particularly `packaging==22.0`, which was blacklisted by `johnnydep==1.20.1` due to a bug.

fix Upgrade your `packaging` library: `pip install --upgrade packaging`. If the issue persists, ensure `johnnydep` itself is up-to-date: `pip install --upgrade johnnydep`.

Warnings

breaking The `dist.console_scripts` attribute, used for programmatic access to console script entry points, changed its return type from a comma-separated string to a `list` of strings in version 1.20.0.
Fix: Update any code relying on `dist.console_scripts` to expect a list of strings and iterate over it or join as needed, instead of splitting a string.
gotcha Johnnydep has had compatibility issues with specific `pip` versions, requiring updates. For instance, v1.20.5 added support for `pip>24`, and v1.20.4 fixed a regression with `pip 23.3`.
Fix: Ensure you are running the latest version of `johnnydep`. If encountering dependency resolution or parsing errors, try upgrading `johnnydep` with `pip install --upgrade johnnydep`.
gotcha Version 1.20.1 blacklisted `packaging v22.0` due to an internal bug in that `packaging` release which could cause `johnnydep` to fail.
Fix: If running `johnnydep` with `packaging==22.0`, upgrade `packaging` to a newer version (e.g., `pip install --upgrade packaging`) or downgrade `packaging` if necessary.

Install

pip install johnnydep Install Johnnydep

Imports

JohnnyDist
```
from johnnydep.lib import JohnnyDist
```
Main class for representing a Python distribution and its dependencies programmatically.
gen_tree
```
from johnnydep.lib import gen_tree
```
Function to generate a rich.tree.Tree object from a JohnnyDist instance.
gen_table
```
from johnnydep.lib import gen_table
```
Function to generate a rich.table.Table object from a JohnnyDist instance.
flatten_deps
```
from johnnydep.lib import flatten_deps
```
Function to flatten a dependency tree into a list.

Quickstart

Display the dependency tree for the 'requests' package directly from the command line.

johnnydep requests

view raw JSON →