字符串

test = "alex"

v = test.capitalize() #首字母大写

print (v)

v1 = test.casefold()#所有变有小写

print(v1)

v2 = test.lower()

print(v2)

v3 = test.center(20,"#)      

print (v3)  

结果：########alex########

test = "alexalexr"

v4 = test.count(‘e‘)

print (v4)

结果：2

v4 = test.count(‘e‘,5)

结果：1

v5 = test.endswith(‘ex‘)

v6 = test.startswith(‘ex‘)

test = "i am {name},{age}"

v = test.format(name=‘alex‘,age=19)

test = "i am [0],[1]"

v = test.format("alex",19")

test = "uasf890"

v = test.isalnum()  #只能字母+数字

字符串

原文：https://www.cnblogs.com/wrw202/p/9533417.html