Update documentation to reflect Python 3.7 minimum version

- Update h2o-py/README.md prerequisites
- Update h2o-docs/welcome.rst supported Python versions (2 locations)
- Update h2o-docs/python-users.rst Conda repository reference
- Update h2o-docs/README.md build requirements

Author: valenad1

h2o-docs/README.md

@@ -8,7 +8,7 @@ Note that there are also some directories under the **/product** folder from the
 
 ### Requirements
 
-- Python 3.6+
+- Python 3.7+
 - [Sphinx](http://www.sphinx-doc.org/) 
 - [Read The Docs theme](https://sphinx-rtd-theme.readthedocs.io/en/stable/)
 - Additional extensions

h2o-docs/src/product/getting-started/python-users.rst

@@ -31,4 +31,4 @@ See a notebook demonstration for how to use grid search in Python.
 Anaconda Cloud users
 --------------------
 
-You can run H2O-3 in an Anaconda Cloud environment. Conda 2.7, 3.5, and 3.6 repositories are supported (as are a number of H2O-3 versions). See Anaconda's `official H2O-3 package <https://anaconda.org/h2oai/h2o/files>`__ to view a list of all available H2O-3 versions. You can refer to the `Install on Anaconda Cloud <../downloading.html#install-on-anaconda-cloud>`__ section for information about installing H2O-3 in an Anaconda Cloud.
+You can run H2O-3 in an Anaconda Cloud environment. Conda 3.7+ repositories are supported (as are a number of H2O-3 versions). See Anaconda's `official H2O-3 package <https://anaconda.org/h2oai/h2o/files>`__ to view a list of all available H2O-3 versions. You can refer to the `Install on Anaconda Cloud <../downloading.html#install-on-anaconda-cloud>`__ section for information about installing H2O-3 in an Anaconda Cloud.

h2o-docs/src/product/welcome.rst

@@ -65,7 +65,7 @@ At a minimum, we recommend the following for compatibility with H2O-3:
 -  **Languages**: R and Python are not required to use H2O-3 unless you want to use H2O in those environments, but Java is always required (see `below <http://docs.h2o.ai/h2o/latest-stable/h2o-docs/welcome.html#java-requirements>`__).
 
    -  R version 3 or later
-   -  Python 3.6.x, 3.7.x, 3.8.x, 3.9.x, 3.10.x, 3.11.x 
+   -  Python 3.7.x, 3.8.x, 3.9.x, 3.10.x, 3.11.x 
 
 -  **Browser**: An internet browser is required to use H2O-3's web UI, Flow. Supported versions include the latest version of Chrome, Firefox, Safari, or Internet Explorer.
 -  **numpy**: H2O-3 only supports ``numpy<2``. To work around having ``numpy2`` installed, run the following command:
@@ -94,7 +94,7 @@ H2O-3 supports the following versions of Java:
 - **Languages**: R and Python are not required to use H2O-3 (unless you want to use H2O-3 in those environments), but Java is always required (see `Java requirements <http://docs.h2o.ai/h2o/latest-stable/h2o-docs/welcome.html#java-requirements>`__).
 
    - R version 3+
-   - Python 3.6.x, 3.7.x, 3.8.x, 3.9.x, 3.10.x, 3.11.x
+   - Python 3.7.x, 3.8.x, 3.9.x, 3.10.x, 3.11.x
 
 - **Browser**: An internet browser is required to use H2O-3's web UI, Flow.
 

h2o-py/README.md

@@ -2,7 +2,7 @@
 
 ## Prerequisites:
 
-  - Python 3.6.x, 3.7.x, 3.8.x, 3.9.x or 3.10.x
+  - Python 3.7.x, 3.8.x, 3.9.x, 3.10.x or 3.11.x
   - Numpy 1.9.2 or greater
 
 This module depends on **requests**, **tabulate**, and **scikit-learn** modules, all of which are available on pypi: