feat : add function - make data index & add daily returns

data_prep/basic_feat.py

@@ -0,0 +1,13 @@
+import pandas as pd
+
+
+def indexify_date(df: pd.DataFrame) -> pd.DataFrame:
+    df["Date"] = pd.to_datetime(df["Date"], dayfirst=True)
+    df = df.set_index("Date")
+    df = df.sort_index()
+    return df
+
+
+def add_daily_return(df: pd.DataFrame) -> pd.DataFrame:
+    df["Daily_Return"] = df["Close"].pct_change()
+    return df