python3常见的字符串格式化方式

"""常见的字符串格式化有哪几种？"""

#1. 占位符
name = 'peter'

str = "%s hello world!" %name

#2. format
str = "{} hello world!".format(name)

#3. f-string  (python3.6之后才有的特性)
str = f"{name} hello world!"