MINOR: added standardise_result function

src/epipipeline/standardise/dengue/functions/standardise_result.py

@@ -0,0 +1,19 @@
+import re
+import numpy as np
+
+def standardise_result(x) -> str:
+    """This function standardises results to positive or negative
+
+    Args:
+        x (str/int): Result in the raw dataset
+
+    Returns:
+        str: Negative, Positive or NaN
+    """
+    if isinstance(x, str) or isinstance(x, int):
+        if re.search(r"-ve|Neg|Negative|No|0", str(x), re.IGNORECASE):
+            return "NEGATIVE"
+        elif re.search(r"NS1|IgM|D|Yes|\+ve|Pos|Positive|1", str(x), re.IGNORECASE):
+            return "POSITIVE"
+    return np.nan
+