2-3-04-11 内置模块-re模块
1. findall
获取匹配到的所有数据
import re
text = "dsf130429191912015219k13042919591219521Xkk"
data_list = re.findall("(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)", text)
print(data_list) # [('130429', '1919', '12', '01', '521', '9'), ('130429', '1959', '12', '19', '521', 'X')]
2. match
从起始位置开始匹配,匹配成功返回一个对象,未匹配成功返回None
import re
text = "大小逗2B最逗3B欢乐"
data = re.match("逗\dB", text)
print(data) # None
import re
text = "逗2B最逗3B欢乐"
data = re.match("逗\dB", text)
if data:
content = data.group() # "逗2B"
print(content)
3. search
浏览整个字符串去匹配第一个,未匹配成功返回None
import re
text = "大小逗2B最逗3B欢乐"
data = re.search("逗\dB", text)
if data:
print(data.group()) # "逗2B"
4. sub
替换匹配成功的位置
import re
text = "逗2B最逗3B欢乐"
data = re.sub("\dB", "沙雕", text)
print(data) # 逗沙雕最逗沙雕欢乐
import re
text = "逗2B最逗3B欢乐"
# 1 表示:从左到右第几个替换
data = re.sub("\dB", "沙雕", text, 1)
print(data) # 逗沙雕最逗3B欢乐
5. split
根据匹配成功的位置分割
import re
text = "逗2B最逗3B欢乐"
data = re.split("\dB", text)
print(data) # ['逗', '最逗', '欢乐']
import re
text = "逗2B最逗3B欢乐"
data = re.split("\dB", text, 1)
print(data) # ['逗', '最逗3B欢乐']
6. finditer
import re
text = "逗2B最逗3B欢乐"
# finditer 每次使用一次取一次
data = re.finditer("\dB", text)
for item in data:
print(item.group())
import re
text = "逗2B最逗3B欢乐"
# ?P<xx> 命名分组
data = re.finditer("(?P<xx>\dB)", text)
for item in data:
print(item.groupdict())
text = "dsf130429191912015219k13042919591219521Xkk"
data_list = re.finditer("\d{6}(?P<year>\d{4})(?P<month>\d{2})(?P<day>\d{2})\d{3}[\d|X]", text)
for item in data_list:
info_dict = item.groupdict()
print(info_dict)