Python学习——str.replace()方法与re.sub()方法对比 | python replace regex
这两种方法都可以对字符串字符串进行替换,但是各有不同,下面就通过不同的例子进行说明:1、str.replace()方法str.replace()方法可以将一个指定的字符格式替换成另一种字符:s=123:456:789s.replace(:,-)得到结果:123-456-7892、re.sub()方法上述例子同样可以用re.sub()方法进行处理:s=123:456:789re.sub(:,-,s)得到结果:123-456-789当然,re.sub()方法不仅可以对一种字符串进行替代,还可以替代多种字符串,比如:s=123:456_789re.sub(r[:_],-,s)得到结果:123-456-789这里,re.sub()方法可以替换多种字符格式。不仅如此,re.sub...
这两种方法都可以对字符串字符串进行替换,但是各有不同,下面就通过不同的例子进行说明:
1、str.replace()方法
str.replace()方法可以将一个指定的字符格式替换成另一种字符:
s = 123:456:789 s.replace(:, -)得到结果:
123-456-7892、re.sub()方法
上述例子同样可以用re.sub()方法进行处理:
s = 123:456:789 re.sub(:, -, s)得到结果:
123-456-789当然,re.sub()方法不仅可以对一种字符串进行替代,还可以替代多种字符串,比如:
s = 123:456_789 re.sub(r[:_], -, s)得到结果:
123-456-789这里,re.sub()方法可以替换多种字符格式。不仅如此,re.sub()方法还可以将不同的字符替换成不同的字符,此时用()表示就可以了。
很显然,re.sub()方法更强大。
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