Remove deprecated population and observation code (#176)

* Remove deprecated population and observation code

* remove api key doc; format

Author: shifucun

README.md

@@ -4,7 +4,6 @@ This is a Python library for accessing data in the Data Commons Graph.
 
 > See also: [Data Commons Pandas API](datacommons_pandas/README.md).
 
-
 To get started, install this package from pip.
 
     pip install datacommons
@@ -13,28 +12,19 @@ Once the package is installed, import `datacommons`.
 
     import datacommons as dc
 
-If you would like to provide an API key, follow the steps in
-[Setting up access to the Data Commons API](https://docs.datacommons.org/api/setup.html),
-add the following line to your code:
-
-    dc.set_api_key('YOUR-API-KEY')
-
-Data Commons *does not charge* users, but uses the API key for
-understanding API usage.
-
 For more detail on getting started with the API, please visit our
-[API Overview](http://docs.datacommons.org/api/).
+[API Overview](https://docs.datacommons.org/api/).
 
 When you are ready to use the API, you can refer to `datacommons/examples` for
 examples on how to use this package to perform various tasks. More tutorials and
-documentation can be found on our [tutorials page](https://datacommons.org/colab)!
+documentation can be found on our [tutorials page](https://docs.datacommons.org/tutorials/)!
 
 ## About Data Commons
 
 [Data Commons](https://datacommons.org/) is an open knowledge repository that
 provides a unified view across multiple public data sets and statistics. You can
 view what [datasets](https://datacommons.org/datasets) are currently ingested
-and browse the graph using our [browser](https://browser.datacommons.org/).
+and browse the graph using our [browser](https://datacommons.org/browser).
 
 ## License
 
@@ -46,22 +36,22 @@ The Python API currently supports `python>=2.7`.
 
 To test, run:
 
-```
-$ ./run_tests_local.sh
+```bash
+./run_tests_local.sh
 ```
 
 To debug the continuous integration tests, run:
 
-```
-$ cloud-build-local --config=cloudbuild.yaml --dryrun=false .
+```bash
+cloud-build-local --config=cloudbuild.yaml --dryrun=false .
 ```
 
 Both commands will run the same set of tests.
 
 To run the examples:
 
-```
-$ python -m datacommons.examples.XXX
+```bash
+python -m datacommons.examples.XXX
 ```
 
 where XXX is the module you want to run.
@@ -76,44 +66,54 @@ starting from the
 
 ### Release to Test PyPI
 
-1. In [setup_datacommons.py](setup_datacommons.py) and
-  [setup_datacommons_pandas.py](setup_datacommons_pandas.py):
-    - Append "-USERNAME" to the package "NAME". For example,
-    `NAME = 'foo_package-janedoe123'`.
-    - Increment the "VERSION" codes to something that has not been used in your
+1. In [setup_datacommons.py](setup_datacommons.py) and [setup_datacommons_pandas.py](setup_datacommons_pandas.py):
+
+   - Append "-USERNAME" to the package "NAME". For example,
+     `NAME = 'foo_package-janedoe123'`.
+   - Increment the "VERSION" codes to something that has not been used in your
      test project. This will not affect the production PyPI versioning.
+
 1. Build the dists:
-    ```bash
-    rm dist/*
-    python3 -m pip install --user --upgrade setuptools wheel
-    python3 setup_datacommons.py sdist bdist_wheel
-    python3 setup_datacommons_pandas.py sdist bdist_wheel
-    ```
+
+   ```bash
+   rm dist/*
+   python3 -m pip install --user --upgrade setuptools wheel
+   python3 setup_datacommons.py sdist bdist_wheel
+   python3 setup_datacommons_pandas.py sdist bdist_wheel
+   ```
+
 1. Release the dists to TestPyPI:
-    ```bash
-    python3 -m pip install --user --upgrade twine
-    python3 -m twine upload --repository testpypi dist/*
-    ```
+
+   ```bash
+   python3 -m pip install --user --upgrade twine
+   python3 -m twine upload --repository testpypi dist/*
+   ```
 
 ### Release to Production PyPI
+
 1. In [setup_datacommons.py](setup_datacommons.py) and
-  [setup_datacommons_pandas.py](setup_datacommons_pandas.py):
-    - Revert the package name to `datacommons` and `datacommons_pandas`
-    - Update and double check "VERSION"
-1. Update [CHANGELOG.md](CHANGELOG.md) and
-  [datacommons_pandas/CHANGELOG.md](datacommons_pandas/CHANGELOG.md)
+   [setup_datacommons_pandas.py](setup_datacommons_pandas.py):
+
+   - Revert the package name to `datacommons` and `datacommons_pandas`
+   - Update and double check "VERSION"
+
+1. Update [CHANGELOG.md](CHANGELOG.md) and [datacommons_pandas/CHANGELOG.md](datacommons_pandas/CHANGELOG.md)
+
 1. Build the dists:
-    ```bash
-    rm dist/*
-    python3 -m pip install --user --upgrade setuptools wheel
-    python3 setup_datacommons.py sdist bdist_wheel
-    python3 setup_datacommons_pandas.py sdist bdist_wheel
-    ```
+
+   ```bash
+   rm dist/*
+   python3 -m pip install --user --upgrade setuptools wheel
+   python3 setup_datacommons.py sdist bdist_wheel
+   python3 setup_datacommons_pandas.py sdist bdist_wheel
+   ```
+
 1. Release the dists to PyPI:
-    ```bash
-    python3 -m pip install --user --upgrade twine
-    twine upload dist/*
-    ```
+
+   ```bash
+   python3 -m pip install --user --upgrade twine
+   twine upload dist/*
+   ```
 
 ## Support
 

cloudbuild.yaml

@@ -1,8 +1,7 @@
 steps:
-
-- id: api_python
-  name: python:3.7-slim
-  entrypoint: /bin/sh
-  args:
-  - -c
-  - 'pip3 install -r requirements.txt && python3 -m pytest'
+  - id: api_python
+    name: python:3.7-slim
+    entrypoint: /bin/sh
+    args:
+      - -c
+      - "pip3 install -r requirements.txt && python3 -m pytest"

datacommons/__init__.py

@@ -27,7 +27,6 @@
 # Data Commons Python API
 from datacommons.core import get_property_labels, get_property_values, get_triples
 from datacommons.places import get_places_in, get_related_places, get_stats
-from datacommons.populations import get_populations, get_observations, get_pop_obs, get_place_obs
 from datacommons.stat_vars import get_stat_value, get_stat_series, get_stat_all
 
 # Other utilities