autoconvert string args to get_instruments to a list

Author: alexgolec

schwab/client/base.py

@@ -1119,6 +1119,9 @@ def get_instruments(self, symbols, projection):
              - String, or array of strings
              - Symbols for which to return fundamentals. Exact match.
         '''
+        if isinstance(symbols, str):
+            symbols = [symbols]
+
         projection = self.convert_enum(projection, self.Instrument.Projection)
 
         params = {

tests/client_test.py

@@ -2178,6 +2178,15 @@ def test_get_instruments(self):
                 'projection': 'fundamental'})
 
 
+    def test_get_instruments_string_args(self):
+        self.client.get_instruments(
+            'AAPL', self.client_class.Instrument.Projection.FUNDAMENTAL)
+        self.mock_session.get.assert_called_once_with(
+            self.make_url('/marketdata/v1/instruments'), params={
+                'symbol': 'AAPL',
+                'projection': 'fundamental'})
+
+
     def test_get_instruments_projection_unchecked(self):
         self.client.set_enforce_enums(False)
         self.client.get_instruments(