Add import specific documentation

doc/import.rst

@@ -0,0 +1,81 @@
+Importing SpikeInterface
+========================
+
+SpikeInterface allows for the generation of powerful and reproducible spike sorting pipelines.
+Flexibility is built into the package starting from import to maximize the productivity of
+the developer and the scientist. Thus there are three ways that SpikeInterface and its components
+can be imported:
+
+
+Importing by Module
+-------------------
+
+Since each spike sorting pipeline involves a series of often repeated steps, many of the developers
+working on SpikeInterface recommend importing in a module by module fashion. This will allow you to
+keep track of your processing steps (preprocessing, postprocessing, quality metrics, etc.). This can
+be accomplished by:
+
+.. code-block:: python
+
+    import spikeinterface as si
+
+to import the :code:`core` module followed by:
+
+.. code-block:: python
+
+    import spikeinterface.extractors as se
+    import spikeinterface.preprocessing as spre
+    import spikeinterface.sorters as ss
+    import spikinterface.postprocessing as spost
+    import spikeinterface.qualitymetrics as sqm
+    import spikeinterface.exporters as sexp
+    import spikeinterface.comparsion as scmp
+    import spikeinterface.curation as scur
+    import spikeinterface.sortingcomponents as sc
+    import spikeinterface.widgets as sw
+
+to import any of the other modules you wish to use.
+
+The benefit of this approach is that it is lighter and faster than importing the whole package and allows
+you to choose which of the modules you actually want to use. If you don't plan to export the results out of
+SpikeInterface then you don't have to :code:`import spikeinterface.exporters`. Additionally the documentation
+of the package is set-up in a modular fashion, so if you have a problem with the module :code:`spikeinterface.curation`,
+you will know to go to the :code:`curation` section of this documention. The disadvantage of this approach is
+that you have more aliases to keep track of.
+
+
+Flat Import
+-----------
+
+A second option is to import the SpikeInterface package in :code:`full` mode. This would be similar to
+what is seen with packages like NumPy (:code:`np`) or Pandas (:code:`pd`). To accomplish this one does:
+
+
+.. code-block:: python
+
+    import spikeinterface.full as si
+
+
+This import statement will import all of the SpikeInterface modules as one flattened module.
+Note that importing :code:`spikeinterface.full` will take a few extra seconds, because some modules use
+just-in-time :code:`numba` compilation performed at the time of import.
+We recommend this approach for advanced users, since it requires a deeper knowledge of the API. The advantage
+being that users can access all functions using one alias.
+
+
+Importing Individual Functions
+------------------------------
+
+Finally, some users may find it useful to have extremely light imports and only import the exact functions
+they plan to use. This can easily be accomplished by importing functions directly into the name space.
+
+For example:
+
+.. code-block:: python
+
+    from spikeinterface.preprocessing import bandpass_filter, common_reference
+    from spikeinterface.core import extract_waveforms
+    from spikeinterface.extractors import read_binary
+
+As mentioned this approach only imports exactly what you plan on using so it is the most minimalist. It does require
+knowledge of the API to know which module to pull a function from. It could also lead to naming clashes if pulling functions directly from other scientific libraries.

doc/index.rst

@@ -40,6 +40,7 @@ SpikeInterface is made of several modules to deal with different aspects of the
 
     overview
     installation
+    import
     modules/index
     how_to/index
     modules_gallery/index

doc/installation.rst

@@ -14,7 +14,7 @@ To install the current release version, you can use:
 
 The :code:`[full]` option installs all the extra dependencies for all the different sub-modules.
 
-Note that if using Z shell (:code:`zsh` - the default shell on mac), you will need to use quotes (:code:`pip install "spikeinterface[full]"`).
+Note that if using Z shell (:code:`zsh` - the default shell on macOS), you will need to use quotes (:code:`pip install "spikeinterface[full]"`).
 
 
 To install all interactive widget backends, you can use:
@@ -63,14 +63,14 @@ as :code:`spikeinterface` strongly relies on these packages to interface with va
 
 
 It is also sometimes useful to have local copies of :code:`neo` and :code:`probeinterface` to make changes to the code. To achieve this, repeat the first set of commands,
-replacing `https://github.com/SpikeInterface/spikeinterface.git` with the appropriate repository in the first code block of this section.
+replacing :code:`https://github.com/SpikeInterface/spikeinterface.git` with the appropriate repository in the first code block of this section.
 
 For beginners
 -------------
 
 We provide some installation tips for beginners in Python here:
 
-https://github.com/SpikeInterface/spikeinterface/tree/master/installation_tips
+https://github.com/SpikeInterface/spikeinterface/tree/main/installation_tips
 
 
 
@@ -89,12 +89,16 @@ Requirements
 Sub-modules have more dependencies, so you should also install:
 
   * zarr
+  * h5py
   * scipy
   * pandas
   * xarray
-  * sklearn
+  * scikit-learn
   * networkx
   * matplotlib
+  * numba
+  * distinctipy
+  * cude-python (for non-macOS users)
 
 
 All external spike sorters can be either run inside containers (Docker or Singularity - see :ref:`containerizedsorters`)

doc/modules/core.rst

@@ -22,37 +22,6 @@ All classes support:
   * multiple segments, where each segment is a contiguous piece of data (recording, sorting, events).
 
 
-Import rules
-------------
-
-Importing the SpikeInterface module
-
-.. code-block:: python
-
-    import spikeinterface as si
-
-will only import the :code:`core` module. Other submodules must be imported separately:
-
-.. code-block:: python
-
-    import spikeinterface.extractors as se
-    import spikeinterface.sorters as ss
-    import spikeinterface.widgets as sw
-
-
-A second option is to import the SpikeInterface package in :code:`full` mode:
-
-.. code-block:: python
-
-    import spikeinterface.full as si
-
-This import statement will import all of SpikeInterface modules as a flattened module.
-Note that importing :code:`spikeinterface.full` will take a few extra seconds, because some modules use
-just-in-time :code:`numba` compilation performed at the time of import.
-We recommend this approach to advanced users, since it requires a deeper knowledge of the API.
-
-
-
 Recording
 ---------