●3-1 天天向上的力量(1)

#e3.1DayDayUp365.py
import math
dayup = math.pow((1.0 + 0.001), 365) # 每天提高0.001
daydown = math.pow((1.0 - 0.001), 365) # 每天荒废0.001
print("向上: %.2f, 向下: %.2f."%(dayup, daydown))

●3-2 天天向上的力量(2)

#e3.2DayDayUp365.py
import math
dayup = math.pow((1.0 + 0.005), 365) # 每天提高0.005
daydown = math.pow((1.0 - 0.005), 365) # 每天荒废0.005
print("向上: %.2f, 向下: %.2f."%(dayup, daydown))

●3-3 天天向上的力量(3)

#e3.3DayDayUp365.py
import math
dayfactor = 0.01
dayup = math.pow((1.0 + dayfactor), 365) # 提高dayfactor
daydown = math.pow((1.0 - dayfactor), 365) # 放任dayfactor
print("向上: {:.2f}, 向下: {:.2f}.".format(dayup, daydown))

●3-4 天天向上的力量(4)

#e3.4DayDayUp365.py
dayup, dayfactor = 1.0, 0.01
for i in range(365):
    if i % 7 not in [6, 0]:
        dayup = dayup * (1 + dayfactor)
    else:
        dayup = dayup * (1 - dayfactor)
print("向上5 天向下2 天的力量: {:.2f}.".format(dayup))

●3-5 天天向上的力量(5)

#e3.5DayDayUp365.py
def dayUP(df):
    dayup = 1.0
    for i in range(365):
        if i % 7 in [6, 0]:
            dayup = dayup * (1 - 0.01)
        else:
            dayup = dayup * (1 + df)
    return dayup
dayfactor = 0.01
while (dayUP(dayfactor)<37.78):
    dayfactor += 0.001
print("每天的努力参数是: %.3f."%dayfactor)

●3-6 获取星期字符串

weekstr = "星期一星期二星期三星期四星期五星期六星期日"
weekid = eval(input("请输入星期数字(1-7): "))
pos = (weekid - 1)*3
print(weekstr[pos: pos+3])

该示范实例暂不支持互动输入内容，不能完美运行，请用idle调试。

●3-7 凯撒密码

plaincode = input("请输入明文: ")
for p in plaincode:
    if ord("a") <= ord(p) <= ord("z"):
        print(chr(ord("a") + (ord(p) - ord("a") + 3)%26),end='')
    else:
        print(p, end='')

该示范实例暂不支持互动输入内容，不能完美运行，请用idle调试。

●3-8 基本的多行文本进度条

#e4.1TextProgress Bar.py
import time
scale = 20
print("------执行开始------")
for i in range(scale+1):
    a, b = '**' * i,'..' * (scale - i)
    c = (i/scale)*100
    print("%{:^3.0f}[{}->{}]" .format (c, a, b))
    time.sleep(0.1)
print("------执行结束------")

●3-9 单行动态刷新

#e4.2TextProgressBar.py
import time
for i in range(101):
    print("\r{:2}%".format(i), end="")
    time.sleep(0.05)

该示范实例暂不支持互动输入内容，不能完美运行，请用idle调试。

●3-10 带刷新的文本进度条

#e4.3TextProgress.py
import time
scale = 50
print("执行开始".center(scale//2,'-'))
t = time.clock()
for i in range(scale+1):
    a = '*' * i
    b = '.' * (scale - i)
    c = (i/scale)*100
    t -= time.clock()
    print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,-t),end='')
    time.sleep(0.05)
print("\n"+"执行结束".center(scale//2,'-'))

该示范实例暂不支持，不能完美运行，请用idle调试。