所有的序列操作都是都是用于字符串。（索引、切片、乘法、长度）
但是因为字符串是不可变的，因此所有的元素赋值和切片赋值都是非法错误。
以下是python中字符串格式的一些基本的用法，初学者的我了解这些已经够用了。
1 format = ‘Hello, %s. %s enough for you?‘ 2 values = (‘world‘, ‘hot‘) 3 print(format % values) 4 5 from string import Template 6 templ = Template(‘Hello, $who! $what enough for ya?‘) 7 print(templ.substitute(who = ‘Eric‘, what = ‘money‘)) 8 9 print(‘{}, {} and {}‘.format(‘a‘, ‘b‘, ‘c‘)) 10 11 print(‘{1}, {0} and {2}‘.format(‘a‘, ‘b‘, ‘c‘)) 12 13 from math import pi 14 print(‘{name} is approximately {value:.2f}.‘.format(name = ‘Π‘, value = pi)) 15 16 from math import e 17 print(f‘Euler\‘s constant is roughly {e}‘)
自己猜猜它们每一块的执行结果吧。
看看自己是否猜得对：
Hello, world. hot enough for you? Hello, Eric! money enough for ya? a, b and c b, a and c Π is approximately 3.14. Euler‘s constant is roughly 2.718281828459045
原文：https://www.cnblogs.com/FunkyEric/p/10362847.html