Python之大小写转换

1 upper lower

大小写转换,字符串中所有字母全部转
strData = "We aRe12 family!"
strNew = strData.upper() ,所有字母全部大写
strNew = strData.lower() ,所有字母全部小写

2  title

strData = "We aRe12 family!"
strNew = strData.title()
print(strNew)
#输出----  We Are12 Family!   单词首字母大写,其他全部转成小写
strData = "We aRe12 fam12ily!"
strNew = strData.title()
print(strNew)
#输出----   We Are12 Fam12Ily!   单词,只要该字母前是非字母,就会转换

3 capitalize

strData = "We aRe12 fam12ily!"
strNew = strData.capitalize()
print(strNew)
#输出----  We are12 fam12ily!  字符串首字母大写(如首位不是字母,保证不变),其余全部小写

4 swapcase

strData = "We aRe12 fam12ily!"
strNew =  strData.swapcase()
print(strNew)
#输出----  wE ArE12 FAM12ILY!  大小写切换

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