Fix WQP_Metadata.site_info: bind as a real property and forward kwargs

`site_info` was defined inside `WQP_Metadata.__init__` as a nested
`@property`-decorated function that was never bound to the class. The
decorator returned a property descriptor that was immediately discarded
when `__init__` returned, so `md.site_info` always fell through to
`BaseMetadata.site_info` and raised `NotImplementedError`. The closure
also used `parameters[...]` (the captured `**parameters` kwargs) for the
lookup but `self._parameters` for the `in` check — inconsistent.

Compounding the issue, every helper called `WQP_Metadata(response)` with
no kwargs, so `self._parameters` was always `{}` even after fixing the
closure.

Move `site_info` to a real property on the class, look up `siteid` first
(WQP-native; the previous `sites`/`site`/`site_no` keys reflected an NWIS
copy-paste and never matched a WQP query), and thread `**kwargs` through
`WQP_Metadata(response, **kwargs)` from all nine call sites so the
property has the parameters it needs.

Also corrected the docstring: the attribute is `comment` (not `comments`,
inherited from `BaseMetadata`), and the `query_time` type is
`datetime.timedelta` (not `datetme.timedelta`).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: thodson-usgs

dataretrieval/wqp.py

@@ -155,7 +155,7 @@ def get_results(
     response = query(url, kwargs, delimiter=";", ssl_check=ssl_check)
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_sites(
@@ -210,7 +210,7 @@ def what_sites(
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_organizations(
@@ -265,7 +265,7 @@ def what_organizations(
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_projects(ssl_check=True, legacy=True, **kwargs):
@@ -316,7 +316,7 @@ def what_projects(ssl_check=True, legacy=True, **kwargs):
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_activities(
@@ -380,7 +380,7 @@ def what_activities(
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_detection_limits(
@@ -442,7 +442,7 @@ def what_detection_limits(
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_habitat_metrics(
@@ -497,7 +497,7 @@ def what_habitat_metrics(
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_project_weights(ssl_check=True, legacy=True, **kwargs):
@@ -553,7 +553,7 @@ def what_project_weights(ssl_check=True, legacy=True, **kwargs):
 
     df = pd.read_csv(StringIO(response.text), delimiter=",", low_memory=False)
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def what_activity_metrics(ssl_check=True, legacy=True, **kwargs):
@@ -609,7 +609,7 @@ def what_activity_metrics(ssl_check=True, legacy=True, **kwargs):
 
     df = pd.read_csv(StringIO(response.text), delimiter=",")
 
-    return df, WQP_Metadata(response)
+    return df, WQP_Metadata(response, **kwargs)
 
 
 def wqp_url(service):
@@ -649,14 +649,15 @@ class WQP_Metadata(BaseMetadata):
     ----------
     url : str
         Response url
-    query_time : datetme.timedelta
+    query_time : datetime.timedelta
         Response elapsed time
     header : requests.structures.CaseInsensitiveDict
         Response headers
-    comments : None
-        Metadata comments. WQP does not return comments.
-    site_info : tuple[pd.DataFrame, NWIS_Metadata] | None
-        Site information if the query included `sites`, `site` or `site_no`.
+    comment : None
+        Metadata comment. WQP does not return comments.
+    site_info : tuple[pd.DataFrame, WQP_Metadata] | None
+        Site information if the query included a site filter (`siteid`,
+        `sites`, `site`, or `site_no`).
     """
 
     def __init__(self, response, **parameters) -> None:
@@ -682,14 +683,14 @@ def __init__(self, response, **parameters) -> None:
 
         self._parameters = parameters
 
-        @property
-        def site_info(self):
-            if "sites" in self._parameters:
-                return what_sites(sites=parameters["sites"])
-            elif "site" in self._parameters:
-                return what_sites(sites=parameters["site"])
-            elif "site_no" in self._parameters:
-                return what_sites(sites=parameters["site_no"])
+    @property
+    def site_info(self):
+        if "siteid" in self._parameters:
+            return what_sites(siteid=self._parameters["siteid"])
+        for legacy_key in ("sites", "site", "site_no"):
+            if legacy_key in self._parameters:
+                return what_sites(siteid=self._parameters[legacy_key])
+        return None
 
 
 def _check_kwargs(kwargs):

tests/wqp_test.py

@@ -216,3 +216,42 @@ def test_check_kwargs():
     kwargs = {"mimeType": "foo"}
     with pytest.raises(ValueError):
         kwargs = _check_kwargs(kwargs)
+
+
+def test_wqp_metadata_site_info_property_resolves(requests_mock):
+    """`site_info` must be a real property bound to the class.
+
+    Regression: previously `site_info` was defined as a closure inside
+    `__init__`, so `md.site_info` fell through to `BaseMetadata.site_info`
+    and raised `NotImplementedError`. Also verify the parameters are
+    threaded through from `get_results`.
+    """
+    results_url = (
+        "https://www.waterqualitydata.us/data/Result/Search?"
+        "siteid=WIDNR_WQX-10032762&mimeType=csv"
+    )
+    sites_url = (
+        "https://www.waterqualitydata.us/data/Station/Search?"
+        "siteid=WIDNR_WQX-10032762&mimeType=csv"
+    )
+    mock_request(requests_mock, results_url, "tests/data/wqp_results.txt")
+    mock_request(requests_mock, sites_url, "tests/data/wqp_sites.txt")
+
+    _df, md = get_results(siteid="WIDNR_WQX-10032762")
+
+    # site_info must be a bound property — accessing it should return the
+    # what_sites() tuple, not raise NotImplementedError.
+    site_df, site_md = md.site_info
+    assert isinstance(site_df, DataFrame)
+    assert site_md.url == sites_url
+
+
+def test_wqp_metadata_site_info_returns_none_without_site_filter(requests_mock):
+    """`site_info` returns None when no site filter was supplied."""
+    results_url = (
+        "https://www.waterqualitydata.us/data/Result/Search?"
+        "characteristicName=Chloride&mimeType=csv"
+    )
+    mock_request(requests_mock, results_url, "tests/data/wqp_results.txt")
+    _df, md = get_results(characteristicName="Chloride")
+    assert md.site_info is None