Added Yahoo Finance documentation

Added yahoo finance documentation in response to #817

Author: lukashalim

cache.sqlite

@@ -0,0 +1 @@
+Version: **0.10.0dev0 (+18, d2ef4e6)** Date: **August 2020**

docs/cache.sqlite

@@ -80,7 +80,7 @@
 
 # Write version and build date
 with open("_version.txt", "w") as version_file:
-    doc_date = dt.datetime.now().strftime("%B %-d, %Y")
+    doc_date = dt.datetime.now().strftime("%B %Y")
     version_file.write(f"Version: **{version}** Date: **{doc_date}**\n")
 
 # The language for content autogenerated by Sphinx. Refer to documentation

docs/source/_version.txt

@@ -21,3 +21,4 @@ Data Readers
    tiingo
    tsp
    world-bank
+   yahoo

docs/source/conf.py

@@ -0,0 +1,46 @@
+Yahoo Finance
+----------------------------
+
+.. py:module:: pandas_datareader.yahoo.daily
+
+.. autoclass:: YahooDailyReader
+   :members:
+   :inherited-members:
+
+.. py:module:: pandas_datareader.yahoo.fx
+
+.. autoclass:: YahooFXReader
+   :members:
+   :inherited-members:
+
+.. py:module:: pandas_datareader.yahoo.options
+
+.. autoclass:: Options
+   :members:
+   :inherited-members:
+
+.. py:module:: pandas_datareader.yahoo.quotes
+
+.. autoclass:: YahooQuotesReader
+   :members:
+   :inherited-members:
+
+.. py:module:: pandas_datareader.yahoo.components
+
+.. autoclass:: _get_data
+   :members:
+   :inherited-members:
+
+.. py:module:: pandas_datareader.yahoo.actions
+
+.. autoclass:: YahooActionReader
+   :members:
+   :inherited-members:
+
+.. autoclass:: YahooDivReader
+   :members:
+   :inherited-members:
+
+.. autoclass:: YahooSplitReader
+   :members:
+   :inherited-members:

docs/source/readers/index.rst

@@ -42,6 +42,7 @@ Currently the following sources are supported:
     - :ref:`Stooq<remote_data.stooq>`
     - :ref:`MOEX<remote_data.moex>`
     - :ref:`Naver Finance<remote_data.naver>`
+    - :ref:`Yahoo Finance<remote_data.yahoo>`
 
 It should be noted, that various sources support different kinds of data, so not all sources implement the same methods and the data elements returned might also differ.
 
@@ -710,3 +711,31 @@ Naver Finance Data
 
 .. _KOSPI: https://en.wikipedia.org/wiki/KOSPI
 .. _KOSDAQ: https://en.wikipedia.org/wiki/KOSDAQ
+
+.. _remote_data.yahoo:
+
+Yahoo Finance Data
+==================
+`Yahoo Finance provides stock market data
+
+The following endpoints are available:
+
+* ``yahoo`` - retrieve daily stock prices (high, open, close, volu,e and adjusted close)
+* ``yahoo-actions`` - retrieve historical corporate actions (dividends and stock splits) 
+* ``yahoo-dividends`` - retrieve historical dividends
+
+.. ipython:: python
+
+   import pandas_datareader.data as web
+   import pandas as pd
+   import datetime as dt
+   df = web.DataReader('GE', 'yahoo', start='2019-09-10', end='2019-10-09')
+   df.head()
+	
+   start = dt.datetime(2010, 1, 29)
+   end = dt.datetime.today()
+   actions = web.DataReader('GOOG', 'yahoo-actions', start, end) 
+   actions.head()
+
+   dividends = web.DataReader('IBM', 'yahoo-dividends', start, end) 
+   dividends.head()

docs/source/readers/yahoo.rst

@@ -241,3 +241,4 @@ def _read_lines(self, input):
             sep=";",
             na_values=("-", "null"),
         )
+        pdr.moex.MoexReader('SBER', '2020-07-02', '2020-07-03').read_all_boards()