Fix API reference

Author: phumthep

docs/requirements.txt

@@ -1,4 +1,3 @@
 sphinx>=4.3.0
 sphinx-rtd-theme>=0.5.1
-sphinx-toolbox>=v0.8.0
-
+sphinx-toolbox>=0.8.0

docs/source/conf.py

@@ -5,16 +5,19 @@
 
 # Import mock modules for readthedocs
 autodoc_mock_imports = [
+    "__future__",
     "datetime",
-    "pandas",
+    "re",
+    "contextily",
+    "geopandas",
     "gurobipy",
     "highspy",
     "networkx",
-    "numpy",
-    "matplotlib.pyplot",
+    "matplotlib",
     "math",
-    "__future__",
-    "re",
+    "numpy",
+    "pandas",
+    "shapely",
 ]
 
 # -- Project information
@@ -59,10 +62,7 @@
 # -- Options for HTML output
 
 html_theme = "sphinx_rtd_theme"
-html_theme_options = {
-    "version": "",
-    "release": "",
-}
+html_theme_options = {"version": "", "release": "", "navigation_depth": 2}
 
 html_context = {
     "display_github": True,  # Add 'Edit on Github' link instead of 'View page source'

src/pownet/data_utils.py

@@ -399,7 +399,7 @@ def get_fuel_mix_order() -> list[str]:
 
     Returns
         list[str]: The order of fuel mix.
-    -------
+
     """
     return pd.read_csv(
         os.path.join(get_database_dir(), "fuels.csv"),