Merge pull request #18 from nschloe/networkx-optional

Networkx optional

setup.cfg

@@ -1,9 +1,9 @@
 [metadata]
 name = matplotx
-version = 0.2.5
+version = 0.2.6
 author = Nico Schlömer
 author_email = nico.schloemer@gmail.com
-description = Extensions for Matplotlib
+description = Useful styles and extensions for Matplotlib
 url = https://github.com/nschloe/matplotx
 project_urls =
     Code=https://github.com/nschloe/matplotx
@@ -33,9 +33,14 @@ package_dir =
 packages = find:
 install_requires =
     matplotlib
-    networkx
     numpy >= 1.20.0
 python_requires = >=3.7
 
 [options.packages.find]
 where=src
+
+[options.extras_require]
+all =
+    networkx
+contour =
+    networkx

src/matplotx/_contour.py

@@ -2,7 +2,6 @@
 
 import matplotlib.colors
 import matplotlib.pyplot as plt
-import networkx
 import numpy as np
 from matplotlib.collections import LineCollection
 from numpy.typing import ArrayLike
@@ -130,6 +129,8 @@ def _get_xy_paths(
     min_jump: float | None = None,
     max_jump: float | None = None,
 ) -> list[np.ndarray]:
+    import networkx
+
     # horizontal and vertical edges
     # horiz.shape = (nx - 1, ny)
     # verti.shape = (nx, ny - 1)