Python使用正则表达式和replace()查找某些字符之间的子字符串

Python使用正则表达式和replace()查找某些字符之间的子字符串

python
import re
text = "Hello, my name is John. I love Python."
pattern = r"my name is (.*?)\."
result = re.search(pattern, text)
if result:
    print(result.group(1))

python
text = "Hello, my name is John. I love Python."
start = "my name is "
end = "."
start_index = text.find(start) + len(start)
end_index = text.find(end, start_index)
result = text[start_index:end_index]
print(result)

python
import re
def find_substring_regex(text, start, end):
    pattern = r"{}(.*?){}".format(start, end)
    result = re.search(pattern, text)
    if result:
        return result.group(1)
    else:
        return None
def find_substring_replace(text, start, end):
    start_index = text.find(start) + len(start)
    end_index = text.find(end, start_index)
    if start_index < end_index:
        return text[start_index:end_index]
    else:
        return None
text = "Hello, my name is John. I love Python."
start = "my name is "
end = "."
result_regex = find_substring_regex(text, start, end)
result_replace = find_substring_replace(text, start, end)
print("使用正则表达式查找的结果：", result_regex)
print("使用replace()函数查找的结果：", result_replace)