试试这个:

mystring = "This Is A String"
print(mystring.replace("String","Text"))

如2。X，使用str.replace()。

例子:

>>> 'Hello world'.replace('world', 'Guido')
'Hello Guido'

供您参考，当将某些字符附加到字符串中任意位置固定的单词后(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。要做到这一点，在replace()中使用split():

s="The dog is large small"
ss=s.replace(s.split()[3],s.split()[3]+'ly')
ss
'The dog is largely small'

Replace()是python3中<class 'str'>的一个方法:

>>> 'hello, world'.replace(',', ':')
'hello: world'

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')

试试这个:

mystring = "This Is A String"
print(mystring.replace("String","Text"))