python startswith() 函数

startswith()

 作用：判断字符串是否以指定字符或子字符串开头

>>> s = "my name is ming"
>>>
>>> s.startswith('m')
True
>>> s.startswith('b')
False
>>>

常用环境：用于if判断

>>> if s.startswith('hel'):
 print ("you are right")
else:
 print ("you are wrang")
  
# 执行结果
you are right