Reference library

AI & LLM integration patterns

Call LLM APIs, structure prompts, parse responses, and ship AI features safely.

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AI & LLM integration patterns easy

How to compute exact match metric in Python

Computes the exact match (EM) metric for LLM outputs by normalizing text and comparing predictions against references.

exact-match metric evaluation
Python 
def compute_exact_match(predictions, references):
    def normalize(text):
        import re
        text = text.lower().strip()
        text = re.sub(r'\b(a|an|the)\b', ' ', text)
        text = re.sub(r'[^a-z0-9\s]', '', text)
        text = ' '.join(text.split())
        return text

    matches = sum(1 for pred, r…
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