1）异常处理：

ry:
x = int(input('Enter the first number: '))
y = int(input('Enter the second number: '))
print(x / y)
except (ZeroDivisionError, TypeError, NameError) as e:
print(e)

#还可以使用else语句
while True:
    try:
        x = int(input('first: '))
        y = int(input('second: '))
        value = x / y
        print('x / y is ', value)
    except Exception as e:
        print('Invalid input: ', e)
        print('Try again')
    else:
        break
还有finaly语句

2）打印帮助文档

def printMax(x, y):
    '''Prints the maximum of two numbers.
    The two values must be integers.'''
    x = int(x) # convert to integers, if possible
    y = int(y)

    if x > y:
        print (x, 'is maximum')
    else:
        print (y, 'is maximum')

printMax(3, 5)
print(printMax.__doc__)
help(printMax)
3）warnings模块

 

 

更多推荐

Python基础教程第三版学习笔记