Add Denmark fetcher support

docs/api.rst

@@ -13,6 +13,7 @@ API Reference
    fetchers/canada
    fetchers/chile
    fetchers/czech
+   fetchers/denmark
    fetchers/france
    fetchers/germany_berlin
    fetchers/japan
@@ -25,4 +26,4 @@ API Reference
    fetchers/spain
    fetchers/uk_ea
    fetchers/uk_nrfa
-   fetchers/usa
+   fetchers/usa

docs/fetchers/denmark.rst

@@ -0,0 +1,5 @@
+Denmark Fetcher
+===============
+
+.. automodule:: rivretrieve.denmark
+   :members:

examples/test_denmark_fetcher.py

@@ -0,0 +1,30 @@
+import logging
+
+import matplotlib.pyplot as plt
+
+from rivretrieve import DenmarkFetcher, constants
+
+logging.basicConfig(level=logging.INFO)
+
+gauge_id = "30000681"
+variable = constants.DISCHARGE_DAILY_MEAN
+start_date = "2023-01-01"
+end_date = "2023-12-31"
+
+fetcher = DenmarkFetcher()
+data = fetcher.get_data(gauge_id=gauge_id, variable=variable, start_date=start_date, end_date=end_date)
+
+if data.empty:
+    print(f"No data found for {gauge_id}")
+else:
+    print(data.head())
+    plt.figure(figsize=(12, 6))
+    plt.plot(data.index, data[variable], label=gauge_id)
+    plt.xlabel(constants.TIME_INDEX)
+    plt.ylabel(f"{variable} (m3/s)")
+    plt.title(f"Denmark River Discharge ({gauge_id})")
+    plt.legend()
+    plt.grid(True)
+    plt.tight_layout()
+    plt.savefig("denmark_discharge_plot.png")
+    print("Plot saved to denmark_discharge_plot.png")

rivretrieve/__init__.py

@@ -6,6 +6,7 @@
 from .canada import CanadaFetcher
 from .chile import ChileFetcher
 from .czech import CzechFetcher
+from .denmark import DenmarkFetcher
 from .france import FranceFetcher
 from .germany_berlin import GermanyBerlinFetcher
 from .japan import JapanFetcher