Z华L的代码

8-3 Python添加set元素

# coding=utf-8

new_names = ['Jenny', 'Ellena', 'Alice', 'Candy', 'David', 'Hally', 'Bob', 'Isen', 'Karl']

name_set = set()

name_set.update(new_names)

print(name_set)

2022-02-12 查看完整代码

9-8 Python函数使用可变关键字参数

# Enter a code

def info(**kwargs):

    names = kwargs['names']

    gender_list = kwargs['gender']

    age_list = kwargs['age']

    index = 0

    for name in names:

        gender = gender_list[index]

        age = age_list[index]

        print('name: {}, gender: {}, age: {}'.format(name, gender, age))

        index += 1



info(names = ['Alice', 'Bob', 'Candy'], gender = ['girl', 'boy', 'girl'], age = [16, 17, 15])

2022-02-12 查看完整代码

9-7 Python函数使用可变参数

# Enter a code

def average(*args):

    sum = 0

    for item in args:

        sum += item

        

    if len(args)>0:

        avg = sum / len(args)

    else:

        return 0

    return avg

print(average())

2022-02-12 查看完整代码

9-6 Python函数使用默认参数

# Enter a code

def greet(name='world'):

    print ('Hello, ' + name + '.')



greet()

greet('Alice')

2022-02-12 查看完整代码

9-5 Python函数参数

# Enter a code

def func(param):

    if isinstance(param, list):

        result = 0

        for item in param:

            if isinstance(item, int) or isinstance(item, float):

                result += item

        return result

    elif isinstance(param, tuple):

        result = 1

        for item in param:

            if isinstance(item, int) or isinstance(item, float):

                result *= item

        return result

    return None

2022-02-11 查看完整代码

9-4 Python递归函数

# coding=utf-8



def sum(num):

    if num==1:

        return 1

    return num+sum(num-1)

print(sum(10))



def sum(num):

    sum=0

    for n in range(1,num+1):

        sum=sum+n

    return sum

print(sum(10))



def sum(num):

    sum = 0

    n = 1

    while n <= num:

        sum += n

        n += 1

    return sum

print(sum(10))

2022-02-11 查看完整代码

9-3 Python函数返回值

# coding=utf-8

def sub_sum(L):

    sum1=0

    sum2=0

    for num in range(len(L)):

        if num%2==0:

            sum1=sum1+L[num]

        else:

            sum2=sum2+L[num]

    return sum1,sum2

L = [1, 3, 5, 7, 9, 11]

result=sub_sum(L)

print(result)

2022-02-11 查看完整代码

9-2 Python定义函数

# Enter a code



def square_of_sum(L):

    result = 0

    for num in L:

        result = result + num*num

    return result

L = [1, 3, 5, 7, 9, 11]

sum=square_of_sum(L)

print(sum)

2022-02-11 查看完整代码

9-1 什么是函数

# Enter a code

L3=[]

for L1 in range(1,101):

    L2=L1*L1

    L3.append(L2)

print(sum(L3))

2022-02-11 查看完整代码

8-5 Python 操作set的其他方法

# Enter a code

s1 = set([1, 2, 3, 4, 5])

s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])

if s1.isdisjoint(s2):

    print('buchonghe')

else:

    for s in s1:

        if s in s2:

            print(s)

2022-02-11 查看完整代码

8-4 Python删除set元素

# Enter a code

L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

S = set([1, 3, 5, 7, 9, 11])

for L1 in L:

    if L1 in S:

        S.remove(L1)

    else:

        S.add(L1)

print(S)

2022-02-11 查看完整代码

8-2 Python读取set元素

# Enter a code

names = ['Alice', 'Bob', 'Candy', 'David', 'Ellena']

name_set = set(names)

print('Alice' in name_set)



names = ['Alice', 'Bob', 'Candy', 'David', 'Ellena', 'alice', 'bob', 'candy', 'david', 'ellena']

name_set = set(names)

print(name_set) # ==> set(['ellena', 'alice', 'Candy', 'Alice', 'candy', 'Ellena', 'Bob', 'David', 'bob', 'david'])

2022-02-10 查看完整代码

8-1 什么是set

# Enter a code

s = set([1, 4, 3, 2, 5])

print(s)



s = set([1, 4, 3, 2, 5, 4, 2, 3, 1])

print(s) 



s=set(['Alice', 'Bob', 'Candy', 'David', 'Ellena'])

print(s)

2022-02-10 查看完整代码

7-7 Python操作dict的其他方法

# Enter a code

d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}

num=0

for key,value in d.items():

    num=num+1

print(num)



d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}

keys = d.keys()

print(len(keys))



print(len(d))

2022-02-10 查看完整代码

7-6 Python dict的特点

# Enter a code

d = {'Alice': [50, 61, 66], 'Bob': [80, 61, 66], 'Candy': [88, 75, 90]}

for key,value in d.items():

    for score in value:

        print(key,score)

2022-02-10 查看完整代码

7-5 Python删除dict元素

# Enter a code

d = {

    'Alice': 45,

    'Bob': 60,

    'Candy': 75,

    'David': 86,

    'Ellena': 49

}

if 'Alice' in d.keys():

    print(d.pop('Alice'))

print(d)

2022-02-10 查看完整代码

7-4 Python更新dict元素

# Enter a code

d = {

    'Alice': 45,

    'Bob': 60,

    'Candy': 75,

    'David': 86,

    'Ellena': 49

}

d['Alice'] = [45,60]

print(d)

2022-02-10 查看完整代码

7-3 Python添加dict元素

# Enter a code

d = {

    'Alice': [45],

    'Bob': [60],

    'Candy': [75],

}

d['Alice'] = [50,61,66]

d['Bob'] = [80, 61,66]

d['Candy'] = [88, 75,90]

print(d)

2022-02-10 查看完整代码

7-2 Python读取dict元素

# Enter a code

d = {

    'Alice': 45,

    'Bob': 60,

    'Candy': 75,

    'David': 86,

    'Ellena': 49

}

d2={'Alice','Bob','Candy','David','Ellena'}

for st in d2:

    print(d.get(st))

    d2=['Alice','Bob','Candy','David','Ellena']

for st in d2:

    print(d.get(st))

    

    d2=('Alice','Bob','Candy','David','Ellena')

for st in d2:

    print(d.get(st))

2022-02-10 查看完整代码

7-1 什么是dict

# Enter a code

d = {

    'Alice': 45,

    'Bob': 60,

    'Candy': 75,

    'David': 86,

    'Ellena': 49

}

d['Gaven']=86

print(d)

2022-02-09 查看完整代码

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Python3 入门教程（新版）