字符数组输出

Astring = 'hello world'
Astring = [0]
Astring = [1:5]
Astring = [6:]

改变字符串

Astring = Astring[:6] + 'python'

删除字符和字符串

Astring = 'hello world'
Astring = Astring[:3] + Astring[4:]
Astring
Astring = ' '
Astring
del Astring