实验1 Python开发环境使用和编程初体验

实验任务1

task1-1

Python源码

print('hey,u')
print('hey', 'u')
x,y,z = 1,2,3
print(x,y,z)

x,y,z = 1,2,3
print('x = %d, y = %d, z = %d' %(x,y,z))
print('x = {}, y = {}, z = {}'.format(x,y,z))
print(f'x = {x}, y = {y}, z = {z}')


print(x)
print(y)
print(z)


print(x, end=' ')
print(y, end=' ')
print(z)

 

运行截图

 

task1-2

x1, y1 = 1.2, 3.57
x2, y2 = 2.26, 8.7

print('{:-^40}'.format('输出1'))
print('x1 = {}, y1 = {}'.format(x1, y1))
print('x2 = {}, y2 = {}'.format(x2, y2))


print('{:-^40}'.format('输出2'))
print('x1 = {:.1f}, y1 = {:.1f}'.format(x1, y1))
print('x2 = {:.1f}, y2 = {:.1f}'.format(x2, y2))


print('{:-^40}'.format('输出3'))
print('x1 = {:<15.1f}, y1 = {:<15.1f}'.format(x1, y1))
print('x2 = {:<15.1f}, y2 = {:<15.1f}'.format(x2, y2))


print('{:-^40}'.format('输出4'))
print('x1 = {:>15.1f}, y1 = {:>15.1f}'.format(x1, y1))
print('x2 = {:>15.1f}, y2 = {:>15.1f}'.format(x2, y2))

 

task1-3

name1, age1 = 'Bill', 19
name2, age2 = 'Helle', 18
title = 'Personnel Information'

print(f'{title:^40}')
print(f'name:{name1:10} age" {age1:3}')
print(f'name:{name2:10} age" {age2:3}')
print(40*'=')

 

 

实验总结

print()的常用的几种输出方式：1.用于输出单个字符串或单个变量print(' ')。2.用于输出多个数据项，用逗号隔开print(' ', ' '）3. 用户混合字符串和变量值。

 

 

实验任务2

task2-1

r1 = eval('1 + 2') 
print(type(r1), r1)
r2 = eval('1+2j')
print(type(r2), r2)
r3 = eval('"python"') 
print(type(r3), r3)
r4 = eval('7, 42')
print(type(r4), r4)

 

 task2-2

x, y = eval(input('Enter two oprands: '))
ans = x + y
print(f'{x} + {y} = {ans}')
print(f'{type(x)} + {type(y)} = {type(ans)}')

 

 

 

 

实验任务3

task3

ans1 = 0.1 + 0.2
print(f'0.1 + 0.2 = {ans1}')

import decimal

ans2 = decimal.Decimal('0.1') + decimal.Decimal('0.2')
print(f'0.1 + 0.2 = {ans2}')

 

 

实验任务4

task4

print(chr(0x1f600), end = " ")
print(chr(0x1f601), end = " ")
print(chr(0x1f602), end = " ")
print(chr(0x1f603), end = " ")
print(chr(0x1f604))
print(chr(10000), end=" ")
print(chr(0x025b), end=" ")
print(chr(0x2708), end=" ")
print(chr(0x00A5), end=" ")
print(chr(0x266b))

print(ord('a'), end = " ")
print(ord('b'), end = " ")
print(ord('c'))
print(ord('A'), end = " ")
print(ord('B'), end = " ")
print(ord('C'))
print(ord('0'), end = " ")
print(ord('1'), end = " ")
print(ord('2'))

 

 

实验任务5

task5-1

import math

n = float(input('输入一个数:'))

ans1 = n**0.5
ans2 = pow(n, 0.5)
ans3 = math.sqrt(n)

print('%.2f的平方根是: %.2f' %(n, ans1))
print('{:.2f}的平方根是: {:.2f}'.format(n, ans2))
print(f'{n:.2f}的平方根是: {ans3:.2f}')

 

 

task5-2

import math
text = '''
好奇心是人的天性。
理想情况下，学习新东西是让人愉快的事。
但学校里的学习似乎有点像苦役。
有时候，需要画一个大饼，每次尝试学一些新鲜的，才会每天变得更好一点点。
'''
print(text)
r = float(input('给学习画一个大饼，大饼要做的很大，半径要这么大: '))
circle = 2*math.pi*r
print(f'绕起来，大饼的圆周有这么长, {circle}, 够不够激发你探索未知的动力...')

 

 

实验任务6

task6

x = eval(input('请输入一个数字：'))
y = x**365
print(f'{x:.2f}的365次方：{y}')

 

 

 

 

实验任务7

task7

p, c, K = eval('1.038, 3.7, 0.0054')
M, Tw = eval('67, 100')
Ty = int('70')
T0 = float(input('输入一个初始温度值：'))

import math

pi = math.pi
t1 = (M**(2/3))*c*(p**(1/3))
t2 = (K*(pi**2)*(((4*pi)/3)**(2/3)))
t3 = ((T0-Tw)/(Ty-Tw))*0.76
t4 = math.log(t3)
t = (t1/t2)*t4
ta = t//60
tb = int(t - ta*60 +0.5)
print(f'T0 = {T0}℃, t = {ta}分{tb}秒')

实验任务8

task8-1

"""
家用电器销售系统
v1.0
"""

print('欢迎使用家用电器销售网络！')


print('产品和价格信息如下：')
print('*'*60)
print('%-10s'%'编号', '%-10s'%'名称', '%-10s'%'品牌', '%-10s'%'价格', '%-10s'%'库存数量')
print('-'*60)
print('%-10s'%'0001', '%-10s'%'电视机', '%-10s'%'海尔', '%10.2f'%5999.00, '%10d'%20)
print('%-10s'%'0002', '%-10s'%'冰箱', '%-10s'%'西门子', '%10.2f'%6998.00, '%10d'%15)
print('%-10s'%'0003', '%-10s'%'洗衣机', '%-10s'%'小天鹅', '%10.2f'%1999.00, '%10d'%10)
print('%-10s'%'0004', '%-10s'%'空调', '%-10s'%'格力', '%10.2f'%3900.00, '%10d'%0)
print('%-10s'%'0005', '%-10s'%'热水器', '%-10s'%'美的', '%10.2f'%688.00, '%10d'%30)
print('%-10s'%'0006', '%-10s'%'笔记本', '%-10s'%'联想', '%10.2f'%5699.00, '%10d'%10)
print('%-10s'%'0007', '%-10s'%'微波炉', '%-10s'%'苏泊尔', '%10.2f'%480.50, '%10d'%33)
print('%-10s'%'0008', '%-10s'%'投影仪', '%-10s'%'松下', '%10.2f'%1250.00, '%10d'%12)
print('%-10s'%'0009', '%-10s'%'吸尘器', '%-10s'%'飞利浦', '%10.2f'%999.00, '%10d'%9)
print('-'*60)

 task8-2

print('欢迎使用家电销售系统！')


print('产品和价格信息如下：')
print('************************************************************')
print('{:10s}{:10s}{:10s}{:10s}{:10s}'.format('编号', '名称', '品牌', '价格', '库存数量'))
print('____________________________________________________________')
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0001', '电视机', '海尔', 5999.00, 20))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0002', '冰箱', '西门子', 6998.00, 15))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0003', '洗衣机', '小天鹅', 1999.00, 10))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0004', '空调', '格力', 3900.00, 0))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0005', '热水器', '美的', 688.00, 30))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0006', '笔记本', '联想', 5699.00, 10))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0007', '微波炉', '苏泊尔', 480.00, 33))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0008', '投影仪', '松下', 1250.00, 12))
print('{:10s}{:10s}{:10s}{:10.2f}{:10}'.format('0009', '吸尘器', '飞利浦', 999.00, 9))
print('____________________________________________________________')

product_id = input('请输入您要购买的产品编号：')
price = float(input('请输入您要购买的产品价格：'))
count = int(input('请输入您要购买的产品数量：'))

print('购买成功，您需要支付', price * count, '元')


print('感谢您的光临，下次再见！')

 

 task8-3

print('欢迎使用家电销售系统！')


print('产品和价格信息如下：')
print('************************************************************')
print(f"{'编号':10s}{'名称':10s}{'品牌':10s}{'价格':10s}{'库存数量':10s}")
print('____________________________________________________________')
print(f"{'0001':10s}{'电视机':10s}{'海尔':10s}{5999:8.2f}{20:10}")
print(f"{'0002':10s}{'冰箱':10s}{'西门子':10s}{6998:8.2f}{15:10}")
print(f"{'0003':10s}{'洗衣机':10s}{'小天鹅':10s}{1999:8.2f}{10:10}")
print(f"{'0004':10s}{'空调':10s}{'格力':10s}{3900:8.2f}{0:10}")
print(f"{'0005':10s}{'热水器':10s}{'美的':10s}{688:8.2f}{30:10}")
print(f"{'0006':10s}{'笔记本':10s}{'联想':10s}{5699:8.2f}{10:10}")
print(f"{'0007':10s}{'微波炉':10s}{'苏泊尔':10s}{480:8.2f}{33:10}")
print(f"{'0008':10s}{'投影仪':10s}{'松下':10s}{1250:8.2f}{12:10}")
print(f"{'0009':10s}{'吸尘器':10s}{'飞利浦':10s}{999:8.2f}{9:10}")
print('____________________________________________________________')


product_id = input('请输入您要购买的产品编号：')
price = float(input('请输入您要购买的产品价格：'))
count = int(input('请输入您要购买的产品数量：'))


print('购买成功，您需要支付', price * count, '元')

print('感谢您的光临，下次再见！')