Python核心编程练习题

1.输入一个数值，判断是否为正数，负数，小数，以及字符串

import re


def is_number(num):
    pattern = re.compile(r'^[-+]?[-0-9]d*.d*|[-+]?.?[0-9]d*$')
    result = pattern.match(num)
    if result:
        return True
    else:
        return False


while True:
    i = input("Enter Number:")
    if i == 'q':
        print('-----End----')
        break
    elif is_number(i):
        if type(eval(i)) == int:
            i = int(i)
            if i > 0:
                print('{} is positive number'.format(i))
            elif i < 0:
                print('{} is negative number'.format(i))
            elif i == 0:
                print('{} is Zero'.format(i))
        else:
            print('{} is decimals'.format(i))
    else:
        print('{} is a string'.format(i))

 2:输入五位数组成一个列表，并求和

lists = []
i = 0
while i < 5:
    list_num = input('enter number:')
    if list_num == 'q':
        break
    else:
        list_num = int(list_num)
        lists.append(list_num)
        print(lists)
        sum_num = sum(lists)
        print('sum:{}'.format(sum_num))
        i += 1