Missing implementation to output matches from the matcher at chapter1_03_rule-based-matching.md

[icoxfog417]

Phenomenon

There is the output of the matches from the matcher at chapter1_03_rule-based-matching.md Matching lexical attributes, but the implementation to get it is missing.

doc = nlp("2018 FIFA World Cup: France won!")

(The implementation is missing to output the following 2018 FIFA World Cup: from doc.

2018 FIFA World Cup:

Proposal

Add the implementation to get the output. The following code is one of the candidate.

matcher = Matcher(nlp.vocab)
matcher.add("IPHONE_PATTERN", None, pattern)
matches = matcher(doc)
for match_id, start, end in matches:
    matched_span = doc[start:end]
    print(matched_span.text)

But a little verbose. We can avoid the repetition of the code by function.

def print_matches(doc, pattern);
    matcher = Matcher(nlp.vocab)
    matcher.add("PATTERN", None, pattern)
    matches = matcher(doc)
    for match_id, start, end in matches:
        matched_span = doc[start:end]
        print(matched_span.text)

Then, we can write as following.

doc = nlp("2018 FIFA World Cup: France won!")
print_matches(doc, pattern)