python 正则表达式 re.findall()与re.finditer()

## 正则表达式re.findall()re.finditer()的区别 re.findall()如果可以匹配返回的是一个列表,re.finditer()返回的是一个迭代器,需要对其进行遍历,才能获取数据。

def findall(pattern, string, flags=0):
    """Return a list of all non-overlapping matches in the string.

    If one or more capturing groups are present in the pattern, return
    a list of groups; this will be a list of tuples if the pattern
    has more than one group.

    Empty matches are included in the result."""
    return _compile(pattern, flags).findall(string)
import re


def main():
    content = '八神是我的好朋友,他的手机电话是18381665314, 他的QQ是1911966573, 他女朋友的电话是18381665315, QQ:1911966574 !'
    regex = re.compile(r'\d{11}')
    tels = regex.findall(content)
    print(tels)


if __name__ == '__main__':
    main()
# ['18381665314', '18381665315']

用以下的finditer()代码,输出的效果是等价的.

import re


def main():
    content = '八神是我的好朋友,他的手机电话是18381665314, 他的QQ是1911966573, 他女朋友的电话是18381665315, QQ:1911966574 !'
    regex = re.compile(r'\d{11}')
    tels_obj = regex.finditer(content)
    print(tels_obj)     #<callable_iterator object at 0x0000016C716066C8>
    tels_list = []
    for tel in tels_obj:
        tels_list.append(tel.group())
    print(tels_list)


if __name__ == '__main__':
    main()
# ['18381665314', '18381665315']
Update time: 2020-05-25

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