Merge pull request #256 from UCL/saransh/fix-dask

fix: graphviz must be installed for dask visualizations

.github/workflows/build_site.yml

@@ -37,7 +37,10 @@ jobs:
         with:
           python-version: 3.12
       - name: Install dependencies
-        run: python -m pip install -r .github/python/requirements.txt
+        run: |
+          sudo apt-get update
+          sudo apt-get install python3-pydot graphviz
+          python -m pip install -r .github/python/requirements.txt
       - name: Building notes
         run: make ready
       - uses: ruby/setup-ruby@v1

ch08performance/030misc-libs.ipynb.py

@@ -329,6 +329,8 @@ def mandel_numpy(position,limit=50):
 
 # %%
 df
+
+# %% [markdown]
 # The computation gave us a dask object and not the actual answer. Why is that?
 # Displaying the dataframe just displays the metadata of the variable, and not any
 # data. This is because of the "lazy" nature of dask. Dask has "lazy" execution,