reverting changes to toc and config

Author: AakashGfude

lectures/_config.yml

@@ -2,7 +2,6 @@ title: QuantEcon DataScience
 author: Chase Coleman, Spencer Lyon, and Jesse Perla
 logo: _static/datascience-logo.png
 description: This website presents a series of lectures on programming, data science, and economics.
-only_build_toc_files: true
 
 execute:
   execute_notebooks: "force"

lectures/_toc.yml

@@ -1,6 +1,50 @@
 format: jb-book
 root: index
 parts:
+- caption: Introduction
+  chapters:
+    - file: introduction/index
+    - file: introduction/overview
+    - file: introduction/getting_started
+    - file: introduction/cloud_setup
+    - file: introduction/local_install
+    - file: introduction/troubleshooting
+- caption: Python Fundamentals
+  chapters:
+    - file: python_fundamentals/index
+    - file: python_fundamentals/basics
+    - file: python_fundamentals/collections
+    - file: python_fundamentals/control_flow
+    - file: python_fundamentals/functions
+- caption: Scientific Computing
+  chapters:
+    - file: scientific/index
+    - file: scientific/numpy_arrays
+    - file: scientific/plotting
+    - file: scientific/applied_linalg
+    - file: scientific/randomness
+    - file: scientific/optimization
+- caption: Pandas
+  chapters:
+    - file: pandas/index
+    - file: pandas/intro
+    - file: pandas/basics
+    - file: pandas/the_index
+    - file: pandas/storage_formats
+    - file: pandas/data_clean
+    - file: pandas/reshape
+    - file: pandas/merge
+    - file: pandas/groupby
+    - file: pandas/timeseries
+    - file: pandas/matplotlib
 - caption: Applications
   chapters:
+    - file: applications/index
+    - file: applications/visualization_rules
     - file: applications/regression
+    - file: applications/recidivism
+    - file: applications/maps
+    - file: applications/classification
+    - file: applications/working_with_text
+    - file: applications/ml_in_economics
+    - file: applications/heterogeneity