如何用Python计算字符串数组在文本中出现的次数？

import re

text = "This is a sample text. It contains some sample sentences."
words = ["sample", "text", "sentences"]

def count_occurrences(text, words):
    count = {}
    for word in words:
        pattern = r'\b' + re.escape(word) + r'\b'
        matches = re.findall(pattern, text, re.IGNORECASE)
        count[word] = len(matches)
    return count

occurrences = count_occurrences(text, words)
for word, count in occurrences.items():
    print(f"The word '{word}' appears {count} times.")