005 改变字符串首字母的大小写

修改字符串首字母的大小写

s1 = 'hello'
print(s1)
print(s1.capitalize())

# s1[0] = 'H' # 只读的，会抛出异常

s1 = s1[0:1] + s1[1].upper() + s1[2:]
print(s1)


hello
Hello
hEllo

　　

拆分字符串

如何将字符串中每个单词的首字母变成大写

s3 = 'hello world'
print(s3)
arr = s3.split(' ')
arr = [s.capitalize() for s in arr]
s3 = ' '.join(arr)
print(s3)

hello world
Hello World