chore: import upstream snapshot with attribution

examples/flows/evaluation/eval-chat-math/line_process.py

@@ -0,0 +1,55 @@
+from promptflow.core import tool
+
+
+def string_to_number(raw_string: str) -> float:
+    ''' Try to parse the prediction string and groundtruth string to float number.
+    Support parse int, float, fraction and recognize non-numeric string with wrong format.
+    Wrong format cases: 'the answer is \box{2/3}', '0, 5, or any number greater than 11', '4/7//9'
+    '''
+    float_number = 0.0
+    try:
+        float_number = float(raw_string)
+    except Exception:
+        if '/' in raw_string:
+            split_list = raw_string.split('/')
+            if len(split_list) == 2:
+                numerator, denominator = split_list
+                try:
+                    float_number = float(numerator) / float(denominator)
+                except Exception:
+                    return None
+            else:
+                return None
+        else:
+            return None
+    return float_number
+
+
+@tool
+def line_process(groundtruth: str, prediction: str) -> int:
+    pred_float = string_to_number(prediction)
+    '''Early stop'''
+    if (pred_float is None):
+        return -1
+    gt_float = string_to_number(groundtruth)
+    if (gt_float is None):
+        return -1
+    ''' both pred_float and gt_float are valid'''
+    if round(pred_float, 10) == round(gt_float, 10):
+        return 1
+    else:
+        return -1
+
+
+if __name__ == "__main__":
+    processed_result = line_process("3/5", "6/10")
+    print("The processed result is", processed_result)
+
+    processed_result = line_process("1/2", "0.5")
+    print("The processed result is", processed_result)
+
+    processed_result = line_process("3", "5")
+    print("The processed result is", processed_result)
+
+    processed_result = line_process("2/3", "the answer is \box{2/3}")
+    print("The processed result is", processed_result)