python语言程序设计-北京理工大学-嵩天等课件代码整理

时间：2018-04-09 14:58:57 收藏：0 阅读：1361

#TempConvert.py
TempStr = input("请输入带有符号的温度值: ")
if TempStr[-1] in [‘F‘, ‘f‘]:
C = (eval(TempStr[0:-1]) - 32)/1.8
print("转换后的温度是{:.2f}C".format(C))
elif TempStr[-1] in [‘C‘, ‘c‘]:
F = 1.8*eval(TempStr[0:-1]) + 32
print("转换后的温度是{:.2f}F".format(F))
else:
print("输入格式错误")

1. #PythonDraw.py
2. import turtle
3. turtle.setup(650, 350, 200, 200)
4. turtle.penup()
5. turtle.fd(-250)
6. turtle.pendown()
7. turtle.pensize(25)
8. turtle.pencolor("purple")
9. turtle.seth(-40)
10. for i in range(4):
11. turtle.circle(40, 80)
12. turtle.circle(-40, 80)
13. turtle.circle(40, 80/2)
14. turtle.fd(40)
15. turtle.circle(16, 180)
16. turtle.fd(40 * 2/3)
17. turtle.done()
- 天天向上的力量第一问
  1. #DayDayUpQ1.py
  2. dayup = pow(1.001, 365)
  3. daydown = pow(0.999, 365)
  4. print("向上：{:.2f}，向下：{:.2f}".format(dayup, daydown))
  天天向上的力量第二问
  1. #DayDayUpQ2.py
  2. dayfactor = 0.005
  3. dayup = pow(1+dayfactor, 365)
  4. daydown = pow(1-dayfactor, 365)
  5. print("向上：{:.2f}，向下：{:.2f}".format(dayup, daydown))
  天天向上的力量第三问
  1. #DayDayUpQ3.py
  2. dayup = 1.0
  3. dayfactor = 0.01
  4. for i in range(365):
  5. if i % 7 in [6,0]:
  6. dayup = dayup*(1-dayfactor)
  7. else:
  8. dayup = dayup*(1+dayfactor)
  9. print("工作日的力量：{:.2f} ".format(dayup))
  天天向上的力量第四问
  1. #DayDayUpQ4.py
  2. def dayUP(df):
  3. dayup = 1
  4. for i in range(365):
  5. if i % 7 in [6,0]:
  6. dayup = dayup*(1 - 0.01)
  7. else:
  8. dayup = dayup*(1 + df)
  9. return dayup
  10. dayfactor = 0.01
  11. while dayUP(dayfactor) < 37.78:
  12. dayfactor += 0.001
  13. print("工作日的努力参数是：{:.3f} ".format(dayfactor))
  文本进度条简单的开始
  1. #TextProBarV1.py
  2. import time
  3. scale = 10
  4. print("------执行开始------")
  5. for i in range(scale+1):
  6. a = ‘*‘ * i
  7. b = ‘.‘ * (scale - i)
  8. c = (i/scale)*100
  9. print("{:^3.0f}%[{}->{}]".format(c,a,b))
  10. time.sleep(0.1)
  11. print("------执行结束------")
  文本进度条单行动态刷新
  1. #TextProBarV2.py
  2. import time
  3. for i in range(101):
  4. print("\r{:3}%".format(i), end="")
  5. time.sleep(0.1)
  文本进度条实例完整效果
  1. #TextProBarV3.py
  2. import time
  3. scale = 50
  4. print("执行开始".center(scale//2, "-"))
  5. start = time.perf_counter()
  6. for i in range(scale+1):
  7. a = ‘*‘ * i
  8. b = ‘.‘ * (scale - i)
  9. c = (i/scale)*100
  10. dur = time.perf_counter() - start
  11. print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end=‘‘)
  12. time.sleep(0.1)
  13. print("\n"+"执行结束".center(scale//2,‘-‘))
  版本1
  1. #CalBMIv1.py
  2. height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
  3. bmi = weight / pow(height, 2)
  4. print("BMI 数值为：{:.2f}".format(bmi))
  5. who = ""
  6. if bmi < 18.5:
  7. who = "偏瘦"
  8. elif 18.5 <= bmi < 25:
  9. who = "正常"
  10. elif 25 <= bmi < 30:
  11. who = "偏胖"
  12. else:
  13. who = "肥胖"
  14. print("BMI 指标为:国际‘{0}‘".format(who))
  版本2
  1. #CalBMIv2.py
  2. height, weight = eval(input("请输入身高(米)和体重\(公斤)[逗号隔开]: "))
  3. bmi = weight / pow(height, 2)
  4. print("BMI 数值为：{:.2f}".format(bmi))
  5. nat = ""
  6. if bmi < 18.5:
  7. nat = "偏瘦"
  8. elif 18.5 <= bmi < 24:
  9. nat = "正常"
  10. elif 24 <= bmi < 28:
  11. nat = "偏胖"
  12. else:
  13. nat = "肥胖"
  14. print("BMI 指标为:国内‘{0}‘".format(nat))
  版本3
  1. #CalBMIv3.py
  2. height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
  3. bmi = weight / pow(height, 2)
  4. print("BMI 数值为：{:.2f}".format(bmi))
  5. who, nat = "", ""
  6. if bmi < 18.5:
  7. who, nat = "偏瘦", "偏瘦"
  8. elif 18.5 <= bmi < 24:
  9. who, nat = "正常", "正常"
  10. elif 24 <= bmi < 25:
  11. who, nat = "正常", "偏胖"
  12. elif 25 <= bmi < 28:
  13. who, nat = "偏胖", "偏胖"
  14. elif 28 <= bmi < 30:
  15. who, nat = "偏胖", "肥胖"
  16. else:
  17. who, nat = "肥胖", "肥胖"
  18. print("BMI 指标为:国际‘{0}‘, 国内‘{1}‘".format(who, nat))
  公式法
  #CalPiV1.py
  
  pi = 0
  
  N = 100
  
  for k in range(N):
  
      pi += 1/pow(16,k)*( \
  
                4/(8*k+1) - 2/(8*k+4) - \
  
                1/(8*k+5) - 1/(8*k+6) )
  
  print("圆周率值是: {}".format(pi))
  蒙特卡罗方法
  #CalPiV2.py
  
  from random import random
  
  from time import perf_counter
  
  DARTS = 1000*1000
  
  hits = 0.0
  
  start = perf_counter()
  
  for i in range(1, DARTS+1):
  
      x, y = random(), random()
  
      dist = pow(x ** 2 + y ** 2, 0.5)
  
      if dist <= 1.0:
  
          hits = hits + 1
  
  pi = 4 * (hits/DARTS)
  
  print("圆周率值是: {}".format(pi))
  
  print("运行时间是: {:.5f}s".format(perf_counter() - start))