close #70; Add from_config class method to instantiate AllRainfall cl…

…ass from configuration

app.py

@@ -19,16 +19,12 @@
 from src.api.utils import (
     raise_time_mode_error_or_do_nothing,
 )
-from src.config import Config
 from src.core.models.all_rainfall import AllRainfall
 from src.core.utils.enums.months import Month
 from src.core.utils.enums.seasons import Season
 from src.core.utils.enums.time_modes import TimeMode
 
-cfg = Config()
-all_rainfall = AllRainfall(
-    cfg.get_dataset_path(), cfg.get_start_year(), cfg.get_rainfall_precision()
-)
+all_rainfall = AllRainfall.from_config()
 
 app = FastAPI(
     debug=True,

src/core/models/all_rainfall.py

@@ -8,6 +8,7 @@
 
 import pandas as pd
 
+from src.config import Config
 from src.core.models.monthly_rainfall import MonthlyRainfall
 from src.core.models.seasonal_rainfall import SeasonalRainfall
 from src.core.models.yearly_rainfall import YearlyRainfall
@@ -30,6 +31,7 @@ class AllRainfall:
     def __init__(
         self,
         dataset_url_or_path: str,
+        *,
         start_year=1971,
         round_precision=2,
     ):
@@ -53,6 +55,16 @@ def __init__(
             for season in Season
         }
 
+    @classmethod
+    def from_config(cls, from_file=False):
+        cfg = Config()
+
+        return cls(
+            cfg.get_dataset_path() if from_file else cfg.get_dataset_url(),
+            start_year=cfg.get_start_year(),
+            round_precision=cfg.get_rainfall_precision(),
+        )
+
     def export_all_data_to_csv(self, folder_path="csv_data") -> str:
         """
         Export all the different data as CSVs into specified folder path.