string模块中有两个常用的类：Template和Formatter。1. Template类：Template类提供了一种简单直观的字符串替换机制，使用$进行占位符替换。案例代码：from string import Templatename = "Alice"age = 25# 创建一个模板字符串template = Template("Hello, my name is $name and I am $age years old.")# 使用...
While other exceptions may still occur, this method is called “safe” because substitutions always tries to return a usable string instead of raising an exception. In another sense,safe_substitute()may be anything other than safe, since it will silently ignore malformed templates containing dangling...
substitute(_name_main='Python', age = 30) ValueError: Invalid placeholder in string >>> template.safe_substitute(_name_main='Python', age = 30) 'Python %age' 我们可以看到,分隔符已经换成了百分号,而标识符必须符合 _字母_字母的形式,否则会提示 valueError。
d in zip(values, delimiters)) 'asdf fjdk;afed,fjek,asdf,foo' >>>print("%10c"%65) print(...
import re string = "Hello, World!" new_string = re.sub("World", "Python", string) print(new_string) # 输出:Hello, Python! 使用字符串模板:Python的string模块提供了Template类,可以使用占位符来进行字符串替换。可以使用substitute()方法来实现替换。例如: ...
s='string methods in python'.replace(' ','-')print(s)# string-methods-in-pythons='string methods in python'.replace(' ','')print(s)# stringmethodsinpython 1. 2. 3. 4. 5. 6. 8、re.sub() re是正则的表达式,sub是substitute表示替换。
s = 'string methods in python'.replace(' ', '') print(s) # stringmethodsinpython ▍8、re.sub() re是正则的表达式,sub是substitute表示替换。 re.sub则是相对复杂点的替换。 import re s = "string methods in python" s2 = s.replace(' ', '-') ...
s = 'string methods in python'.replace(' ', '-')print(s)# string-methods-in-pythons = 'string methods in python'.replace(' ', '')print(s)# stringmethodsinpython 8、re.sub()re是正则的表达式，sub是substitute表示替换。re.sub则是相对复杂点的替换。import res = "string methods in p...
s = 'string methods in python'.replace(' ', '')print(s)# stringmethodsinpython 8、re.sub() re是正则的表达式,sub是substitute表示替换。 re.sub则是相对复杂点的替换。 import res = "string methods in python"s2 = s.replace(' ', '-')print(s2)# stri...
sub(pattern, repl, string, count=0, flags=0) 这就是substitute功能。它返回通过用替换替换或替换字符串中最左边的非重叠模式所获得的字符串repl。如果找不到该模式,则该字符串将原样返回。 email_address = 'Please contact us at: xyz@datacamp.com' ...