Python在字符表达式中搜索指定为单词的字符串，类似于SAS INDEXW函数

import re

def search_word(text, word):
    pattern = r'\b{}\b'.format(word)
    match = re.search(pattern, text)
    if match:
        return match.start(), match.end()
    else:
        return None

text = "This is a sample text. Python is a powerful programming language."
word = "Python"

result = search_word(text, word)
if result:
    start, end = result
    print("The word '{}' is found at index {} to {}.".format(word, start, end))
else:
    print("The word '{}' is not found in the text.".format(word))