When using the python pandas_datareader
to retrieve stock data, Google once in a while blocks the access when too many requests are sent in a certain time frame.
from pandas_datareader import data as web
df = web.DataReader(name=ticker, data_source='google', start='20170421', end='20170421')
Imagine that I have to iterate through several of such tickers ('AAPL','MSFT',....). Does anyone know how many requests per second/minute/hour/day can be sent without running into issues with Google?