1. 52周存钱挑战
1 import math
2 import datetime
3
4
5 def save_money_in_n_weeks(money_per_week, increase_money, total_week):
6 """
7 计算n周内的存款金额
8 """
9
10 money_list = [] # 记录每周存款数的列表
11 saved_money_list = [] # 记录每周账户累计
12
13 for i in range(total_week):
14 money_list.append(money_per_week)
15 saving = math.fsum(money_list)
16 saved_money_list.append(saving)
17
18 # 输出信息
19 # print('第{}周，存入{}元，账户累计{}元'.format(i + 1, money_per_week, saving))
20
21 # 更新下一周的存钱金额
22 money_per_week += increase_money
23
24 return saved_money_list
25
26
27 def main():
28 """
29 主函数
30 """
31 money_per_week = float(input('请输入每周的存入的金额：')) # 每周的存入的金额
32 increase_money = float(input('请输入每周的递增金额：')) # 递增的金额
33 total_week = int(input('请输入总共的周数：')) # 总共的周数
34
35 # 调用函数
36 saved_money_list = save_money_in_n_weeks(money_per_week, increase_money, total_week)
37
38 input_date_str = input('请输入日期(yyyy/mm/dd):')
39 input_date = datetime.datetime.strptime(input_date_str, '%Y/%m/%d')
40 week_num = input_date.isocalendar()[1]
41 print('第{}周的存款：{}元'.format(week_num, saved_money_list[week_num - 1]))
42
43 if __name__ == '__main__':
44 main()
2. 利用递归函数绘制分形树
1 import turtle
2
3
4 def draw_branch(branch_length):
5 """
6 绘制分形树
7 """
8 if branch_length > 5:
9 # 绘制右侧树枝
10 turtle.forward(branch_length)
11 print('向前 ', branch_length)
12 turtle.right(20)
13 print('右转 20')
14 draw_branch(branch_length - 15)
15
16 # 绘制左侧树枝
17 turtle.left(40)
18 print('左转 40')
19 draw_branch(branch_length - 15)
20
21 # 返回之前的树枝
22 turtle.right(20)
23 print('右转 20')
24 turtle.backward(branch_length)
25 print('向后 ', branch_length)
26
27
28 def main():
29 """
30 主函数
31 """
32 turtle.left(90)
33 turtle.penup()
34 turtle.backward(150)
35 turtle.pendown()
36 turtle.color('brown')
37 draw_branch(80)
38 turtle.exitonclick()
39
40 if __name__ == '__main__':
41 main()
3. 五角星的绘制
1 import turtle
2
3
4 def draw_pentagram(size):
5 """
6 绘制五角星
7 """
8 # 计数器
9 count = 1
10 while count <= 5:
11 turtle.forward(size)
12 turtle.right(144)
13 # count = count + 1
14 count += 1
15
16
17 def draw_recursive_pentagram(size):
18 """
19 迭代绘制五角星
20 """
21 # 计数器
22 count = 1
23 while count <= 5:
24 turtle.forward(size)
25 turtle.right(144)
26 # count = count + 1
27 count += 1
28
29 # 五角星绘制完成，更新参数
30 size += 10
31 if size <= 100:
32 draw_recursive_pentagram(size)
33
34
35 def main():
36 """
37 主函数
38 """
39
40 turtle.penup()
41 turtle.backward(200)
42 turtle.pendown()
43 turtle.pensize(2)
44 turtle.pencolor('red')
45
46 size = 50
47 draw_recursive_pentagram(size)
48
49 turtle.exitonclick()
50
51 if __name__ == '__main__':
52 main()
4. 汇率兑换
1 def main():
2 """
3 主函数
4 """
5 # 汇率
6 USD_VS_RMB = 6.47
7
8 # 带单位的货币输入
9 currency_str_value = input('请输入带单位的货币金额：')
10
11 unit = currency_str_value[-3:]
12
13 if unit == 'CNY':
14 exchange_rate = 1 / USD_VS_RMB
15
16 elif unit == 'USD':
17 exchange_rate = USD_VS_RMB
18
19 else:
20 exchange_rate = -1
21
22 if exchange_rate != -1:
23 in_money = eval(currency_str_value[:-3])
24 # 使用lambda定义函数
25 convert_currency2 = lambda x: x * exchange_rate
26
27 # # 调用函数
28 # out_money = convert_currency(in_money, exchange_rate)
29
30 # 调用lambda函数
31 out_money = convert_currency2(in_money)
32 print('转换后的金额：', out_money)
33 else:
34 print('不支持该种货币！')
35
36 if __name__ == '__main__':
37 main()
5.基础代谢率计算
1 def main():
2 """
3 主函数
4 """
5 y_or_n = input('是否退出程序(y/n)？')
6
7 while y_or_n != 'y':
8 # # 性别
9 # gender = input('性别：')
10 # # print(type(gender))
11 #
12 # # 体重 (kg)
13 # weight = float(input('体重(kg)：'))
14 # # print(type(weight))
15 #
16 # # 身高 (cm)
17 # height = float(input('身高(cm)：'))
18 # # print(type(height))
19 #
20 # # 年龄
21 # age = int(input('年龄：'))
22 # # print(type(age))
23 print('请输入以下信息，用空格分割')
24 input_str = input('性别 体重(kg) 身高(cm) 年龄：')
25 str_list = input_str.split(' ')
26
27 try:
28 gender = str_list[0]
29 weight = float(str_list[1])
30 height = float(str_list[2])
31 age = int(str_list[3])
32
33 if gender == '男':
34 # 男性
35 bmr = (13.7 * weight) + (5.0 * height) - (6.8 * age) + 66
36 elif gender == '女':
37 # 女性
38 bmr = (9.6 * weight) + (1.8 * height) - (4.7 * age) + 655
39 else:
40 bmr = -1
41
42 if bmr != -1:
43 print('您的性别：{}，体重：{}公斤，身高：{}厘米，年龄：{}岁'.format(gender, weight, height, age))
44 print('您的基础代谢率：{}大卡'.format(bmr))
45 else:
46 print('暂不支持该性别')
47 except ValueError:
48 print('请输入正确的信息！')
49 except IndexError:
50 print('输入的信息过少！')
51 except:
52 print('程序异常！')
53
54 print() # 输出空行
55 y_or_n = input('是否退出程序(y/n)？')
56
57
58 if __name__ == '__main__':
59 main()
6.模拟掷骰子
1 import matplotlib.pyplot as plt
2 import numpy as np
3
4 # 解决中文显示问题
5 plt.rcParams['font.sans-serif'] = ['SimHei']
6 plt.rcParams['axes.unicode_minus'] = False
7
8
9 def main():
10 """
11 主函数
12 """
13 total_times = 10000
14
15 # 记录骰子的结果
16 roll1_arr = np.random.randint(1, 7, size=total_times)
17 roll2_arr = np.random.randint(1, 7, size=total_times)
18 result_arr = roll1_arr + roll2_arr
19
20 hist, bins = np.histogram(result_arr, bins=range(2, 14))
21 print(hist)
22 print(bins)
23
24 # 数据可视化
25 plt.hist(result_arr, bins=range(2, 14), edgecolor='black', linewidth=1, rwidth=0.8)
26
27 # 设置x轴坐标点显示
28 tick_labels = ['2点', '3点', '4点', '5点',
29 '6点', '7点', '8点', '9点', '10点', '11点', '12点']
30 tick_pos = np.arange(2, 13) + 0.5
31 plt.xticks(tick_pos, tick_labels)
32
33 plt.title('骰子点数统计')
34 plt.xlabel('点数')
35 plt.ylabel('频率')
36 plt.show()
37
38
39 if __name__ == '__main__':
40 main()
7.输入某年某月某日，判断这一天是这一年的第几天？
1 from datetime import datetime
2
3
4 def is_leap_year(year):
5 """
6 判断year是否为闰年
7 是，返回True
8 否，返回False
9 """
10 is_leap = False
11
12 if (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):
13 is_leap = True
14
15 return is_leap
16
17
18 def main():
19 """
20 主函数
21 """
22 input_date_str = input('请输入日期(yyyy/mm/dd)：')
23 input_date = datetime.strptime(input_date_str, '%Y/%m/%d')
24
25 year = input_date.year
26 month = input_date.month
27 day = input_date.day
28
29 # # 包含30天 月份集合
30 # _30_days_month_set = {4, 6, 9, 11}
31 # _31_days_month_set = {1, 3, 5, 7, 8, 10, 12}
32
33 # 月份-天数 字典
34 month_day_dict = {1: 31,
35 2: 28,
36 3: 31,
37 4: 30,
38 5: 31,
39 6: 30,
40 7: 31,
41 8: 31,
42 9: 30,
43 10: 31,
44 11: 30,
45 12: 31}
46
47 day_month_dict = {30: {4, 6, 9, 11},
48 31: {1, 3, 5, 7, 8, 10, 12}}
49
50 # 初始化值
51 days = 0
52 days += day
53
54 for i in range(1, month):
55 days += month_day_dict[i]
56
57 if is_leap_year(year) and month > 2:
58 days += 1
59
60 print('这是{}年的第{}天。'.format(year, days))
61
62
63 if __name__ == '__main__':
64 main()
8. 判断密码强度
1 class PasswordTool:
2 """
3 密码工具类
4 """
5 def __init__(self, password):
6 # 类的属性
7 self.password = password
8 self.strength_level = 0
9
10 def process_password(self):
11 # 规则1：密码长度大于8
12 if len(self.password) >= 8:
13 self.strength_level += 1
14 else:
15 print('密码长度要求至少8位！')
16
17 # 规则2：包含数字
18 if self.check_number_exist():
19 self.strength_level += 1
20 else:
21 print('密码要求包含数字！')
22
23 # 规则3：包含字母
24 if self.check_letter_exist():
25 self.strength_level += 1
26 else:
27 print('密码要求包含字母！')
28
29 # 类的方法
30 def check_number_exist(self):
31 """
32 判断字符串中是否含有数字
33 """
34 has_number = False
35
36 for c in self.password:
37 if c.isnumeric():
38 has_number = True
39 break
40
41 return has_number
42
43 def check_letter_exist(self):
44 """
45 判断字符串中是否含有字母
46 """
47 has_letter = False
48 for c in self.password:
49 if c.isalpha():
50 has_letter = True
51 break
52 return has_letter
53
54
55 class FileTool:
56 """
57 文件工具类
58 """
59 def __init__(self, filepath):
60 self.filepath = filepath
61
62 def write_to_file(self, line):
63 f = open(self.filepath, 'a')
64 f.write(line)
65 f.close()
66
67 def read_from_file(self):
68 f = open(self.filepath, 'r')
69 lines = f.readlines()
70 f.close()
71 return lines
72
73
74 def main():
75 """
76 主函数
77 """
78
79 try_times = 5
80 filepath = 'password_6.0.txt'
81 # 实例化文件工具对象
82 file_tool = FileTool(filepath)
83
84 while try_times > 0:
85
86 password = input('请输入密码：')
87 # 实例化密码工具对象
88 password_tool = PasswordTool(password)
89 password_tool.process_password()
90
91 line = '密码：{}, 强度：{}\n'.format(password, password_tool.strength_level)
92 # 写操作
93 file_tool.write_to_file(line)
94
95 if password_tool.strength_level == 3:
96 print('恭喜！密码强度合格！')
97 break
98 else:
99 print('密码强度不合格！')
100 try_times -= 1
101
102 print()
103
104 if try_times <= 0:
105 print('尝试次数过多，密码设置失败！')
106
107 # 读操作
108 lines = file_tool.read_from_file()
109 print(lines)
110
111
112 if __name__ == '__main__':
113 main()
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