Remove hardcoded format in nwis.get_discharge_measurements (#150)

* Remove hardcoded format in nwis.get_discharge_measurements

* Update test URL

dataretrieval/nwis.py

@@ -309,8 +309,11 @@ def get_discharge_measurements(
     kwargs['begin_date'] = kwargs.pop('begin_date', start)
     kwargs['end_date'] = kwargs.pop('end_date', end)
 
+    if 'format' not in kwargs:
+       kwargs['format'] = 'rdb'
+
     response = query_waterdata(
-        'measurements', format='rdb', ssl_check=ssl_check, **kwargs
+        'measurements', ssl_check=ssl_check, **kwargs
     )
     return _read_rdb(response.text), NWIS_Metadata(response, **kwargs)
 

tests/waterservices_test.py

@@ -27,6 +27,7 @@
 except ImportError:
     gpd = None
 
+
 def test_query_waterdata_validation():
     """Tests the validation parameters of the query_waterservices method"""
     with pytest.raises(TypeError) as type_error:
@@ -179,7 +180,8 @@ def test_get_info(requests_mock):
 
 
 def test_get_qwdata(requests_mock):
-    """Tests get_qwdata method correctly generates the request url and returns the result in a DataFrame"""
+    """Tests get_qwdata method correctly generates the request url and returns
+    the result in a DataFrame"""
     format = "rdb"
     site = '01491000%2C01645000'
     request_url = 'https://nwis.waterdata.usgs.gov/nwis/qwdata?site_no={}' \
@@ -306,8 +308,8 @@ def test_get_discharge_measurements(requests_mock):
     DataFrame"""
     format = "rdb"
     site = "01594440"
-    request_url = 'https://nwis.waterdata.usgs.gov/nwis/measurements?format={}&site_no={}' \
-                  '&begin_date=2000-02-14&end_date=2020-02-15'.format(format, site)
+    request_url = 'https://nwis.waterdata.usgs.gov/nwis/measurements?site_no={}' \
+                  '&begin_date=2000-02-14&end_date=2020-02-15&format={}'.format(site, format)
     response_file_path = 'data/waterdata_measurements.txt'
     mock_request(requests_mock, request_url, response_file_path)
     df, md = get_discharge_measurements(sites=[site], start='2000-02-14', end='2020-02-15')
@@ -321,10 +323,10 @@ def test_get_discharge_measurements(requests_mock):
 @pytest.mark.parametrize("site_input_type_list", [True, False])
 def test_get_discharge_measurements_sites_value_types(requests_mock, site_input_type_list):
     """Tests get_discharge_measurements method for valid input types for 'sites' parameter"""
-    _format = "rdb"
+    format = "rdb"
     site = "01594440"
-    request_url = 'https://nwis.waterdata.usgs.gov/nwis/measurements?format={}&site_no={}' \
-                  '&begin_date=2000-02-14&end_date=2020-02-15'.format(_format, site)
+    request_url = 'https://nwis.waterdata.usgs.gov/nwis/measurements?site_no={}' \
+                  '&begin_date=2000-02-14&end_date=2020-02-15&format={}'.format(site, format)
     response_file_path = 'data/waterdata_measurements.txt'
     mock_request(requests_mock, request_url, response_file_path)
     if site_input_type_list: