字符串相关操作
统计字符串中某个单词的出现的次数
a = 'test 123 dfg test'
## 方法1
len([i for i in a.split(' ') if i == test])
## 方法2
len(a.split('test'))-1
Python提取两个字符串之间的内容
import re
str = '''/begin MEASUREMENT
100
LINK
DISPLAY
SYMBOL
/end MEASUREMENT'''
regex = r'/begin MEASUREMENT([\s\S]*)/end MEASUREMENT'
matches = re.findall(regex, str)
for match in matches:
print(match)
import re
str = 'test:100 end'
regex = r'test:([\s\S]*)/end'
matches = re.findall(regex, str)
test = matches[0].strip()
字符删除、替换
删除空格
s = ' 123abcd456 '
# 删除两边的空格
print(s.strip())
# 删除右边空格
print(s.rstrip())
# 删除左边空格
print(s.lstrip())
# 删除两边的数字
print(s.strip(' ').strip('123456'))
# 删除两边的引号
s = "'123abcd456'"
print(s.strip("'"))
分割并去除空格
string = " hello , world !"
string = [x.strip() for x in string.split(',')]
将格式化字符转换为字典
string = "dst='192.168.0.1',src='192.168.1.2'"
fields = dict((field.split('=') for field in string.split(',')))
fields = dict(((lambda a:(a[0].strip("'"),a[1].strip("'"))) (field.split('=')) for field in string.split(',')))
>>> fields
{'dst': "'192.168.0.1'", 'src': "'192.168.1.2'"}
删除(替换)任意位置字符
s = '11233aabcdd41556'
# 删除某个特定字符
print(ss.replace('1', ''))
# 同时删除不同字符
import re
print(re.sub('[1a]', '', s))
文章标题:Python笔记:字符串操作
本文作者:hiyo
本文链接:https://www.cnblogs.com/hiyong/p/14290055.html
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