---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-5-51f84a0ede84> in <module>()
     38                                                       host=os.environ['MYSQL_HOST'])
     39     con = create_engine(constr)
---> 40     main()

<ipython-input-5-51f84a0ede84> in main()
     28         result = results.fetch_row(how=1)"""
     29 
---> 30     df = pd.read_sql(sql)
     31     help(df)
     32 

NameError: name 'pd' is not defined