CI: Fix graphviz installation

.github/workflows/ci.yml

@@ -15,9 +15,9 @@ jobs:
           python-version: "3.10"
           environment-file: environment.yml
           activate-environment: quantecon
-      - name: Graphics Support
-        run: |
-          sudo apt-get -qq update && sudo apt-get install -y graphviz
+      # - name: Graphics Support
+      #   run: |
+      #     sudo apt-get -qq update && sudo apt-get install -y graphviz
       # - name: Install latex dependencies
       #   run: |
       #     sudo apt-get -qq update
@@ -80,4 +80,4 @@ jobs:
           deploy-message: "Preview Deploy from GitHub Actions"
         env:
           NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
-          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
+          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 lectures/_build
-*/.ipynb_checkpoints/
+*/.ipynb_checkpoints/
+_build/*

environment.yml

@@ -1,9 +1,11 @@
 name: quantecon
 channels:
   - default
+  - conda-forge
 dependencies:
   - python=3.10
   - anaconda=2023.03
+  - python-graphviz
   - pip
   - pip:
     - jupyter-book==0.15.1
@@ -23,4 +25,3 @@ dependencies:
     # - cylp
     # - array-to-latex
     # - prettytable
-

lectures/networks.md

@@ -13,10 +13,18 @@ kernelspec:
 
 # Networks
 
+```{admonition} graphviz
+:class: warning
+If you are running this lecture locally it requires [graphviz](https://www.graphviz.org)
+to be installed on your computer. Installation instructions for graphviz can be found
+[here](https://www.graphviz.org/download/)
+```
+
 ```{code-cell} ipython3
 :tags: [hide-output]
 
-pip install quantecon-book-networks pandas-datareader
+!pip install quantecon graphviz
+!pip install quantecon-book-networks pandas-datareader
 ```