Create 2023-06-20-conda_setup.md

_posts/2023-06-20-conda_setup.md

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+---
+title:  My Jupyter and Conda setup
+date: 2022-02-02
+layout: post
+image:
+---
+
+These are my notes to myseld about how to setup my jupyter environments because I always forget
+
+### Use micromamba instead of conda
+Mamba is hugely faster than conda. Use minimamba installed with brew.
+
+Put this in the `~/.condarc` (which mamba obeys):
+```yaml
+channel_priority: strict
+channels:
+  - conda-forge
+```
+
+### Jupyter environmnet
+Create a `jupyter_env.yaml` file (so that you can tear it down and rebuild it when everything explodes)
+
+
+Create env from file: `mamba env create -f file.yaml`
+Remove env by name: `mamba env remove -y -n envname`
+Export only manually installed packages to file: `mamba env export --from-history`
+
+```yaml
+name: jupyter
+channels:
+  - conda-forge
+dependencies:
+  - python=3.11 
+  - jupyterlab
+  - nb_conda_kernels # This makes conda envs visible to jupyterlab
+  - jupyterlab_widgets # Makes ipywidgets work in jupyterlab
+```
+Notes:
+(making mamba kernels visible)[https://github.com/Anaconda-Platform/nb_conda_kernels]
+(making ipywidgets work)[https://ipywidgets.readthedocs.io/en/latest/user_install.html#installing-the-jupyterlab-extension]
+Can get a env yaml with `conda env export --from-history`
+
+#### Child environments
+To make other environments visible to the jupyter lab instance and make ipqidgets work (i.e for tqdm progress bars) you need two extra packags:
+
+```yaml
+name: child
+channels:
+  - conda-forge
+dependencies:
+  - python=3.11
+  - ipywidgets # The child to jupyterlab_widgets
+  - ipykernel # The child to nb_conda_kernels
+```