[英]How to use string.replace() in python 3.x
string.replace()
在 python 3.x 上已弃用。 这样做的新方法是什么?
replace()
是 python3 中<class 'str'>
一个方法:
>>> 'hello, world'.replace(',', ':')
'hello: world'
python 3 中的 replace() 方法仅通过以下方式使用:
a = "This is the island of istanbul"
print (a.replace("is" , "was" , 3))
#3 is the maximum replacement that can be done in the string#
>>> Thwas was the wasland of istanbul
# Last substring 'is' in istanbul is not replaced by was because maximum of 3 has already been reached
您可以使用str.replace()作为链str.replace() 。 你觉得你有一个像串'Testing PRI/Sec (#434242332;PP:432:133423846,335)'
,并要更换所有的'#',':',';','/'
与招牌'-'
。 您可以通过这种方式(正常方式)替换它,
>>> string = 'Testing PRI/Sec (#434242332;PP:432:133423846,335)'
>>> string = string.replace('#', '-')
>>> string = string.replace(':', '-')
>>> string = string.replace(';', '-')
>>> string = string.replace('/', '-')
>>> string
'Testing PRI-Sec (-434242332-PP-432-133423846,335)'
或者这样( str.replace()链)
>>> string = 'Testing PRI/Sec (#434242332;PP:432:133423846,335)'.replace('#', '-').replace(':', '-').replace(';', '-').replace('/', '-')
>>> string
'Testing PRI-Sec (-434242332-PP-432-133423846,335)'
试试这个:
mystring = "This Is A String"
print(mystring.replace("String","Text"))
仅供参考,当将一些字符附加到字符串内的任意位置固定词时(例如,通过添加后缀-ly将形容词更改为副词),您可以将后缀放在行尾以提高可读性。 为此,请在replace()
使用split()
replace()
:
s="The dog is large small"
ss=s.replace(s.split()[3],s.split()[3]+'ly')
ss
'The dog is largely small'
Python 3
str.replace
的官方文档官方文档: Python 3 的str.replace
str.replace(旧的,新的[,计数])
返回字符串的副本,其中所有出现的子字符串 old 都被 new 替换。 如果给出了可选参数计数,则仅替换第一个计数出现。
对应的VSCode
的语法说明是:
str.replace(self: str, old, new, count) -> str
str.replace
两种方法str.replace(strVariable, old, new[, count])
replacedStr1 = str.replace(originStr, "from", "to")
strVariable.replace(old, new[, count])
replacedStr2 = originStr.replace("from", "to")
代码:
originStr = "Hello world"
# Use case 1: use builtin str's replace -> str.replace(strVariable, old, new[, count])
replacedStr1 = str.replace(originStr, "world", "Crifan Li")
print("case 1: %s -> %s" % (originStr, replacedStr1))
# Use case 2: use str variable's replace -> strVariable.replace(old, new[, count])
replacedStr2 = originStr.replace("world", "Crifan Li")
print("case 2: %s -> %s" % (originStr, replacedStr2))
输出:
case 1: Hello world -> Hello Crifan Li
case 2: Hello world -> Hello Crifan Li
截屏:
我的相关(中文)帖子: 【详解】Python 3中字符串的替换str.replace
ss = s.replace(s.split()[1], +s.split()[1] + 'gy')
# should have no plus after the comma --i.e.,
ss = s.replace(s.split()[1], s.split()[1] + 'gy')
简单替换: .replace(old, new, count) 。
text = "Apples taste Good."
print(text.replace('Apples', 'Bananas')) # use .replace() on a variable
Bananas taste Good. <---- Output
print("Have a Bad Day!".replace("Bad","Good")) # Use .replace() on a string
Have a Good Day! <----- Output
print("Mom is happy!".replace("Mom","Dad").replace("happy","angry")) #Use many times
Dad is angry! <----- Output
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