Python中格式化字符串的方法总结

name = "sagegrass"
age = 18
greeting = f"你好，我的名字是{name}，我今年{age}岁，我去年{age - 1}岁"
 
print(greeting)

name = "sagegrass"
print(f"{name=}") # 此时输出结果为name=sagegrass

name = "sagegrass"
age = 18
greeting = "你好，我的名字是%s，我今年%d岁，我去年%d岁" % (name, age, age - 1)
 
print(greeting)

p1 = "锄禾"
p2 = "当午"
p3 = "汗滴"
p4 = "下土"
poem = "{}日{}，{}禾{}".format(p1, p2, p3, p4)
 
print(poem)

p1 = "一寸"
p2 = "光阴"
p3 = "金"
poem = "{0}{1}{0}{2}，寸{2}难买寸{1}".format(p1, p2, p3)
 
print(poem)

name = "sagegrass"
age = 18
greeting = "你好，我的名字是{name}，我今年{age}岁，我去年{age_of_last_year}岁".format(name=name, age=age, age_of_last_year=age - 1)
 
print(greeting)

from string import Template
 
name = "sagegrass"
age = 18
template = Template("你好，我的名字是$name，我今年$age岁，我去年$age_of_last_year岁")
greeting = template.substitute(name=name, age=age, age_of_last_year=age - 1)
 
print(greeting)

from string import Template
 
name = "sagegrass"
age = 18
template = Template("你好，我的名字是$name，我今年$age岁，我去年$age_of_last_year岁")
greeting = template.safe_substitute(name=name)
 
print(greeting) # 你好，我的名字是sagegrass，我今年$age岁，我去年$age_of_last_year岁

name = "sagegrass"
age = 18
greeting = "你好，我的名字是" + name + "，我今年" + str(age) +"岁，我去年" + str(age - 1) + "岁"
 
print(greeting)

name = "sagegrass"
age = 18
greeting = "".join(("你好，我的名字是", name, "，我今年", str(age), "岁，我去年", str(age - 1), "岁"))
 
print(greeting)

import re
 
def my_format(template, **kwargs):
    return re.sub(r'\{(\w+)\}', lambda match: str(kwargs.get(match.group(1), match.group(0))), template)
 
name = "sagegrass"
age = 18
greeting = my_format("你好，我的名字是{name}，我今年{age}岁，我去年{age_of_last_year}岁", name=name, age=age, age_of_last_year=age - 1)
print(greeting)