string_types not a valid object

Author: econdb

pandas_datareader/econdb.py

@@ -1,6 +1,5 @@
 import requests
 import pandas as pd
-import pandas.compat as compat
 
 from pandas_datareader.base import _BaseReader
 
@@ -15,7 +14,7 @@ class EcondbReader(_BaseReader):
     @property
     def url(self):
         """API URL"""
-        if not isinstance(self.symbols, compat.string_types):
+        if not isinstance(self.symbols, str):
             raise ValueError('data name must be string')
 
         return ('{0}?{1}&format=json&page_size=500&expand=both'