🚚 move notebooks over from pymc3

Author: MarcoGorelli

.gitignore

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+*.pyc
+.ipynb_checkpoints

.pre-commit-config.yaml

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+repos:
+- repo: https://github.com/nbQA-dev/nbQA
+  rev: 0.5.5
+  hooks:
+    - id: nbqa-black
+      additional_dependencies: [black==20.8b1]
+    - id: nbqa-isort
+      additional_dependencies: [isort==5.6.4]
+    - id: nbqa-pyupgrade
+      additional_dependencies: [pyupgrade==2.7.4]
+      args: [--py37-plus]
+- repo: local
+  hooks:
+    - id: watermark
+      args: [--negate, --multiline]
+      entry: '%load_ext watermark.*%watermark -n -u -v -iv -w'
+      language: pygrep
+      minimum_pre_commit_version: 2.8.0
+      name: Check notebooks have watermark (see Jupyter style guide from PyMC3 Wiki)
+      types: [jupyter]
+    - id: check-toc
+      entry: python scripts/check_toc_is_complete.py
+      language: python
+      name: Check all notebooks appear in table of contents
+      types: [jupyter]