pass symbols string parsing to __init__

Author: StochasticDoge

pandas_datareader/econdb.py

@@ -10,6 +10,14 @@ class EcondbReader(_BaseReader):
     _format = None
     _show = "labels"
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(**kwargs)
+        params = dict(s.split("=") for s in self.symbols.split("&"))
+        if "from" in params and not kwargs.get("start"):
+            self.start = pd.to_datetime(params["from"], format="%Y-%m-%d")
+        if "to" in params and not kwargs.get("end"):
+            self.end = pd.to_datetime(params["to"], format="%Y-%m-%d")
+
     @property
     def url(self):
         """API URL"""
@@ -22,12 +30,6 @@ def url(self):
 
     def read(self):
         """read one data from specified URL"""
-        params = dict(s.split("=") for s in self.symbols.split("&"))
-        if "from" in params:
-            self.start = pd.to_datetime(params["from"], format="%Y-%m-%d")
-        if "to" in params:
-            self.end = pd.to_datetime(params["to"], format="%Y-%m-%d")
-
         results = self.session.get(self.url).json()["results"]
         df = pd.DataFrame({"dates": []}).set_index("dates")
 

pandas_datareader/tests/test_econdb.py

@@ -52,7 +52,7 @@ def test_get_tourism(self):
         # TOURISM_INBOUND
 
         df = web.DataReader(
-            "dataset=OE_TOURISM_INBOUND&COUNTRY=JPN,USA&" "VARIABLE=INB_ARRIVALS_TOTAL",
+            "dataset=OE_TOURISM_INBOUND&COUNTRY=JPN,USA&VARIABLE=INB_ARRIVALS_TOTAL",
             "econdb",
             start=pd.Timestamp("2008-01-01"),
             end=pd.Timestamp("2012-01-01"),