Python 用户输入 --笔记

input()        函数接收输入字符

int()            获取数值输入

stu = input("please input: ")
print("output: ",stu)
a = "sdf gret try w35r re"
a += "please input:"
stu = input(a)          #如果提示字符太长，通过赋值变量输出
print("output: ",stu)

stu = int(input("please input digit: "))   #只能够输入数字，否则会出错
print("output: ",stu)

please input: rweq
output:  rweq
sdf gret try w35r replease input:greggre
output:  greggre
please input digit: 3242321
output:  3242321


#错误实例
please input: ew
output:  ew
sdf gret try w35r replease input:rew
output:  rew
please input digit: erw
Traceback (most recent call last):
  File "/Users/sw-diag/Desktop/SW-USERS/Lin/pythonProject/main.py", line 122, in 
    stu = int(input("please input digit: "))   #只能够输入数字，否则会出错
ValueError: invalid literal for int() with base 10: 'erw'