CLN: Add all to data to prevent spurious deletion of import

Add __all__ to prevent spurious deletion of import and flake8 error

Author: bashtage

pandas_datareader/data.py

@@ -18,10 +18,17 @@
 from pandas_datareader.oecd import OECDReader
 from pandas_datareader.quandl import QuandlReader
 from pandas_datareader.yahoo.actions import (YahooActionReader, YahooDivReader)
+from pandas_datareader.yahoo.components import _get_data as \
+    get_components_yahoo
 from pandas_datareader.yahoo.daily import YahooDailyReader
 from pandas_datareader.yahoo.options import Options as YahooOptions
 from pandas_datareader.yahoo.quotes import YahooQuotesReader
 
+__all__ = ['get_components_yahoo', 'get_data_enigma', 'get_data_famafrench',
+           'get_data_fred', 'get_data_google', 'get_data_moex',
+           'get_data_quandl', 'get_data_yahoo', 'get_data_yahoo_actions',
+           'get_nasdaq_symbols', 'get_quote_google', 'get_quote_yahoo']
+
 
 def get_data_fred(*args, **kwargs):
     return FredReader(*args, **kwargs).read()
@@ -67,8 +74,10 @@ def DataReader(name, data_source=None, start=None, end=None,
                retry_count=3, pause=0.001, session=None, access_key=None):
     """
     Imports data from a number of online sources.
+
     Currently supports Yahoo! Finance, Google Finance, St. Louis FED (FRED),
     Kenneth French's data library, and the SEC's EDGAR Index.
+
     Parameters
     ----------
     name : str or list of strs
@@ -88,22 +97,29 @@ def DataReader(name, data_source=None, start=None, end=None,
         single value given for symbol, represents the pause between retries.
     session : Session, default None
             requests.sessions.Session instance to be used
+
     Examples
     ----------
+
     # Data from Yahoo! Finance
     gs = DataReader("GS", "yahoo")
+
     # Corporate Actions (Dividend and Split Data)
     # with ex-dates from Yahoo! Finance
     gs = DataReader("GS", "yahoo-actions")
+
     # Data from Google Finance
     aapl = DataReader("AAPL", "google")
+
     # Data from FRED
     vix = DataReader("VIXCLS", "fred")
+
     # Data from Fama/French
     ff = DataReader("F-F_Research_Data_Factors", "famafrench")
     ff = DataReader("F-F_Research_Data_Factors_weekly", "famafrench")
     ff = DataReader("6_Portfolios_2x3", "famafrench")
     ff = DataReader("F-F_ST_Reversal_Factor", "famafrench")
+
     # Data from EDGAR index
     ed = DataReader("full", "edgar-index")
     ed2 = DataReader("daily", "edgar-index")