Add NetorkX to dependency list

README.md

@@ -24,6 +24,7 @@ The following packages are required in order to build the library:
     -   [NumPy](https://numpy.org/)
     -   [QtPy](https://github.com/spyder-ide/qtpy)
     -   [setuptools_scm](https://github.com/pypa/setuptools_scm/)
+    -   [NetworkX](https://networkx.org/)
 -   Qt 5 or 6, with Python bindings, one of:
     - pyside2
     - pyqt5

pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
     "graphviz>=0.19",
     "matplotlib",
     "setuptools_scm[toml]>=6.2",
+    "networkx",
 ]
 classifiers = [
     "Intended Audience :: Education",

requirements.txt

@@ -3,3 +3,4 @@ qtpy
 graphviz>=0.19
 matplotlib
 setuptools_scm[toml]>=6.2
+networkx