字符串是 python 中最常用的数据类型。可以使用引号“ ”来创建字符串,只要为变量分配一个值即可。例如:
name=“alice”
x="or" y="ange" x+y
结果:
orange
sen="this is power." print(sen.capitalize())
结果:
this is power.
sen="this is power." print(sen.title())
结果:
this is power.
sen="this is power." print(sen.upper())
结果:
this is power.
sen="this is power." print(sen.casefold())
结果:
this is power.
sen="this is power." print(sen.lower())
结果:
this is power.
sen="god,but life is loneliness." print(sen.count("li"))
结果:2
sen="god,but life is loneliness." print(sen.startswith("go"))
结果:false
sen="god,but life is loneliness." print(sen.endswith("ss."))
结果:true
sen="god,but life is loneliness." print(sen.find("i"))
结果:9
find()从左端开始检查,rfind()从右端开始。可以为find()设置开始点和结束点,如
sen="god,but life is loneliness." print(sen.find("i",10,15))
结果:13
index()用法与find相似
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