def rect_area(width,height):
    area = width * height
    return area

def print_area(width,height):
    area = width * height
    print("{0} x {1} 长方形的面积:{2}".format(width,height,area))


def rect_area(width,height):
    area = width * height
    return area

def print_area(width,height):
    area = width * height
    print("{0} x {1} 长方形的面积:{2}".format(width,height,area))


def rect_area(width,height):
    area = width * height
    return area

r_area = rect_area(320,480)
print("{0}x{1} 长方形的面积:{2:.2f}".format(320,480,r_area))

r_area = rect_area(width=320,height=480)
print("{0}x{1} 长方形的面积:{2:.2f}".format(320,480,r_area))

r_area = rect_area(height=480,width=320)
print("{0}x{1} 长方形的面积:{2:.2f}".format(320,480,r_area))



def make_coffee(name="卡布奇诺"):
    return "制作一杯{0}咖啡。".format(name)

coffee1 = make_coffee("拿铁")
coffee2 = make_coffee()
print(coffee1)
print(coffee2)

def sum(*numbers):
    total=0.0
    for number in numbers:
        total += number
    return total

print(sum(100.0,20.0,30.0))
print(sum(30.0,80.0))

def show_info(**info):
    print('-----show_info-----')
    for key, value in info.items():
        print('{0}-{1}'.format(key,value))

print(show_info(name='Tony', age = 18,sex = True))
print(show_info(student_name='Tony', student_no='1000'))

x = 20
def print_value1():
    x = 10
    print("函数中的x = {0}".format(x))

print_value1()
print("全局变量x = {0}".format(x))

x = 20
def print_value2():
    global x
    x = 10
    print("函数中的x = {0}".format(x))

print_value2()
print("全局变量x = {0}".format(x))

def add(a,b):
    return a + b

def sub(a,b):
    return a - b

def square(a):
    return a * a
 
def calc(opr):
    if opr == '+':
        return add
    elif opr == '-':
        return sub
    elif opr == '^ 2':
        return square

f1 = calc('+')
f2 = calc('-')
f3 = calc('^ 2')
print('10 + 5 = {0}'.format(f1(10,5)))
print('10 - 5 = {0}'.format(f2(10,5)))
print('4 ^ 2 = {0} '.format(f3(4)))

def f4(x):
    return x > 50

data1 = [66,15,91,28,98,50,7,80,90]
filtered = filter(f4,data1)
data2 = list(filtered)
print(data2)

def f5(x):
    return x * 2
data3 = [66,15,91,28,98,50,7,80,90]
mapped = map(f5,data3)
data4 = list(mapped)
print(data4)

def calc(opr):
    if opr == '+':
        return lambda a,b :(a + b)
    else:
        return lambda a,b :(a - b)

f1 = calc('+')
f2 = calc('-')
print("10 + 5 = {0}".format(f1(10,5)))
print("10 - 5 = {0}".format(f2(10,5)))

data1 = [66,15,91,28,98,50,7,80,99]

filtered =filter(lambda x : (x>50),data1)
data2 = list(filtered)
print(data2)

mapped = map(lambda x : (x * 2),data1)
data3 = list(mapped)
print(data3)