2.2 作业答案

1.如何查看一个值得内存地址？

基于内置函数id来获取，例如：
    addr1 = id("武沛齐")
    addr2 = id([11,22,33,44])

2.函数的参数传递的是引用（内存地址）还是值（拷贝一份）？

参数参数默认传递的是引用（内存地址）

3.看代码写结果

v1 = {}
v2 = v1
v1["k1"] = 123

print(v1, v2)  # {'k1': 123} {'k1': 123}

4.看代码写结果

def func(k, v, info={}):
    info[k] = v
    return info


v1 = func(1, 2)
print(v1)  # {1: 2}

v2 = func(4, 5, {})
print(v2)  # {4: 5}

v3 = func(5, 6)
print(v3)  # {1: 2, 5: 6}

5.看代码写结果

def func(k, v, info={}):
    info[k] = v
    return info


v1 = func(1, 2)
v2 = func(4, 5, {})
v3 = func(5, 6)

print(v1, v2, v3)  # {1: 2, 5: 6}   {4: 5}   {1: 2, 5: 6}

6. 简述第5题、第6题的结果为何结果不同。

第5题中的 v1和v3变量指向的都是函数内部维护的那个列表的内存地址。
    先print(v1)时，函数内部维护的列表的值当时是{1: 2}
    最后print(v3)时，函数内部维护的列表的值已被修改为{1: 2, 5: 6}

第5题中的 v1和v3变量也是指向的都是函数内部维护的那个列表的内存地址。
    最后再print v1和v3 时，结果就是最终函数内部维护的列表的值，即： {1: 2, 5: 6}

7.看代码写结果

def func(*args, **kwargs):
    print(args, kwargs)
    return "完毕"


v1 = func(11, 22, 33)  # (11, 22, 33) {}
print(v1)  # 完毕

v2 = func([11, 22, 33])  # ([11, 22, 33],) {}
print(v2)  # 完毕

v3 = func(*[11, 22, 33])  # (11, 22, 33) {}
print(v3)  # 完毕

v4 = func(k1=123, k2=456)  # () {'k1': 123, 'k2': 456}
print(v4)  # 完毕

v5 = func({"k1": 123, "k2": 456})  # ({'k1': 123, 'k2': 456},) {}
print(v5)  # 完毕

v6 = func(**{"k1": 123, "k2": 456})  # () {'k1': 123, 'k2': 456}
print(v6)  # 完毕

v7 = func([11, 22, 33], **{"k1": 123, "k2": 456})  # ([11, 22, 33],) {'k1': 123, 'k2': 456}
print(v7)  # 完毕

v8 = func(*[11, 22, 33], **{"k1": 123, "k2": 456})  # (11, 22, 33) {'k1': 123, 'k2': 456}
print(v8)  # 完毕

8.看代码写结果

def func(*args, **kwargs):
    prev = "-".join(args)
    data_list = []
    for k, v in kwargs.items():
        item = "{}-{}".format(k, v)
        data_list.append(item)
        content = "*".join(data_list)
    return prev, content


v1 = func("北京", "上海", city="深圳", count=99)
print(v1)  # ('北京-上海', 'city-深圳*count-99')

v2 = func(*["北京", "上海"], **{"city": "深圳", "count": 99})
print(v2)  # ('北京-上海', 'city-深圳*count-99')

9.补充代码，实现获取天气信息并按照指定格式写入到文件中。【重点讲】

import requests


def write_file(**kwargs):
    data_list = []

    row_dict = kwargs["weatherinfo"]
    for k, v in row_dict.items():
        group = "{}-{}".format(k, v)
        data_list.append(group)
    row_string = ",".join(data_list)

    with open('xxxx.txt', mode='a', encoding="utf-8") as file_object:
        file_object.write("{}\n".format(row_string))


def get_weather(code):
    url = "http://www.weather.com.cn/data/ks/{}.html".format(code)
    res = requests.get(url=url)
    res.encoding = "utf-8"
    weather_dict = res.json()
    return weather_dict


city_list = [
    {'code': "101020100", 'title': "上海"},
    {'code': "101010100", 'title': "北京"},
]

for item in city_list:
    # 101020100
    result_dict = get_weather(item["code"])
    write_file(**result_dict)

10.看代码写结果

def func():
    return 1, 2, 3


val = func()
print( type(val) == tuple) # True
print( type(val) == list) # False
print( type(val) == dict) # False

info = {
    "1": [11, 22, 33],
    "2": {'k1': 123, "k2": 456, "k3": "999"}
}
index = input("请输入序号：")
value = info[index]
if type(value) == list:
    print(value[0], value[1], value[2])
elif type(value) == dict:
    print(value['k1'], value['k2'], value['k3'])

11.看代码写结果

def func(users, name):
    users.append(name)
    print(users)


result = func(['武沛齐', '李杰'], 'alex')  # # ['武沛齐', '李杰', 'alex']
print(result)  # None

12.看代码写结果

def func(v1):
    return v1 * 2


def bar(arg):
    return "%s 是什么玩意？" % (arg,)


val = func('你')
data = bar(val)
print(data) # 你你 是什么玩意？

13.看代码写结果

def func(v1):
    return v1 * 2


def bar(arg):
    msg = "%s 是什么玩意？" % (arg,)
    print(msg)


val = func('你')
data = bar(val) # 你你 是什么玩意？
print(data) # None

14.看代码写结果

def func():
    data = 2 * 2
    return data

data_list = [func,func,func]

for item in data_list:
    v = item()
    print(v)

# 输出：
# 4  
# 4  
# 4

15.分析代码，写结果

def func(handler, **kwargs):
    # handler() -> killer()
    # kwargs = {"name": "武沛齐", "age": 18}
    extra = {
        "code": 123,
        "name": "武沛齐"
    }
    kwargs.update(extra)
    # kwargs = {"name": "武沛齐", "age": 18,"code": 123,}
    return handler(**kwargs)


def something(**kwargs):
    return len(kwargs)


def killer(**kwargs):
    # {"name": "武沛齐", "age": 18,"code": 123,}
    key_list = []
    for key in kwargs.keys():
        key_list.append(key)
    return key_list # ["name","age","code"]


v1 = func(something, k1=123, k2=456)
print(v1)  # 4

v2 = func(killer, **{"name": "武沛齐", "age": 18})
print(v2)  # ["name","age","code"]

16.两个结果输出的分别是什么？并简述其原因。

def func():
    return 123


v1 = [func, func, func, func, ]
print(v1)  # 列表，内部元素都是函数（将函数名放在列表的索引位置，函数名代指函数）

v2 = [func(), func(), func(), func()]
print(v2)  # 列表，内部元素都是123（执行函数之后，将函数的返回值放在列表的索引位置）

17.看代码结果

v1 = '武沛齐'


def func():
    print(v1)


func()  # 武沛齐
func()  # 武沛齐

18.看代码结果

v1 = '武沛齐'


def func():
    print(v1)


func()  # 武沛齐

v1 = '老男人'

func()  # 老男人

19.看代码写结果

NUM_LIST = []
SIZE = 18


def f1():
    NUM_LIST.append(8)
    SIZE = 19


def f2():
    print(NUM_LIST)
    print(SIZE)


f2()  # []   18
f1()  # 无任何输出
f2()  # [8]   18

20.看代码写结果

NUM_LIST = [11, 22, 33]
SIZE = 18


def f1():
    global NUM_LIST
    global SIZE
    NUM_LIST = "武沛齐"
    SIZE = 19


def f2():
    print(NUM_LIST)
    print(SIZE)


f2()  # [11,22,33] 18
f1()  # 无输出
f2()  # 武沛齐  19

21.资源下载器 v1版本【重点讲】

import requests

SELECTED_IMAGE_SET = set()  # 已下载图片ID（序号）
SELECTED_VIDEO_SET = set()
SELECTED_NBA_SET = set()


def download(file_path, url):
    res = requests.get(
        url=url,
        headers={
            "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 FS"
        }
    )
    with open(file_path, mode='wb') as f:
        f.write(res.content)


def download_image():
    total_image_dict = {
        "1": ("吉他男神", "https://hbimg.huabanimg.com/51d46dc32abe7ac7f83b94c67bb88cacc46869954f478-aP4Q3V"),
        "2": ("漫画美女", "https://hbimg.huabanimg.com/703fdb063bdc37b11033ef794f9b3a7adfa01fd21a6d1-wTFbnO"),
        "3": ("游戏地图", "https://hbimg.huabanimg.com/b438d8c61ed2abf50ca94e00f257ca7a223e3b364b471-xrzoQd"),
        "4": ("alex媳妇", "https://hbimg.huabanimg.com/4edba1ed6a71797f52355aa1de5af961b85bf824cb71-px1nZz"),
    }
    while True:
        # 构造 1.吉他男神;2.漫画美女;
        text_list = []
        for num, item in total_image_dict.items():
            if num in SELECTED_IMAGE_SET:
                continue
            data = "{}.{}".format(num, item[0])
            text_list.append(data)
        if text_list:
            text = ";".join(text_list)
        else:
            text = "无可下载选项"
        # 输出：1.吉他男神;2.漫画美女;3.游戏地图;4.alex媳妇
        print(text)

        # 返回上一步
        index = input("请输入要选择的序号(Q/q退出）：")
        if index.upper() == "Q":
            return

        # 选择序号 3
        if index in SELECTED_IMAGE_SET:
            print("已下载，无法再继续下载，请重新选择！")
            continue

        group = total_image_dict.get(index)
        if not group:
            print("序号不存在，请重新选择")
            continue

        # 下载图片
        file_path = "{}.png".format(group[0])
        download(file_path, group[1])

        # 已下载集合中
        SELECTED_IMAGE_SET.add(index)


def download_video():
    total_video_dict = {
        "1": {"title": "东北F4模仿秀",
              'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0300f570000bvbmace0gvch7lo53oog"},
        "2": {"title": "卡特扣篮",
              'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200f3e0000bv52fpn5t6p007e34q1g"},
        "3": {"title": "罗斯mvp",
              'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200f240000buuer5aa4tij4gv6ajqg"},
    }

    while True:
        text_list = []
        for num, item in total_video_dict.items():
            if num in SELECTED_VIDEO_SET:
                continue
            data = "{}.{}".format(num, item["title"])
            text_list.append(data)
        if text_list:
            text = ";".join(text_list)
        else:
            text = "无可下载选项"
        print(text)
        index = input("请输入要选择的序号(Q/q退出）：")
        if index.upper() == "Q":
            return

        if index in SELECTED_VIDEO_SET:
            print("已下载，无法再继续下载，请重新选择！")
            continue

        group = total_video_dict.get(index)
        if not group:
            print("序号不存在，请重新选择")
            continue

        file_path = "{}.mp4".format(group["title"])
        download(file_path, group["url"])

        SELECTED_VIDEO_SET.add(index)


def download_nba():
    total_nba_dict = {
        "1": {"title": "威少奇才首秀三双",
              "url": "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0300fc20000bvi413nedtlt5abaa8tg&ratio=720p&line=0"},
        "2": {"title": "塔图姆三分准绝杀",
              "url": "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0d00fb60000bvi0ba63vni5gqts0uag&ratio=720p&line=0"}

    }
    while True:
        text_list = []
        for num, item in total_nba_dict.items():
            if num in SELECTED_NBA_SET:
                continue
            data = "{}.{}".format(num, item["title"])
            text_list.append(data)
        if text_list:
            text = ";".join(text_list)
        else:
            text = "无可下载选项"
        print(text)
        index = input("请输入要选择的序号(Q/q退出）：")
        if index.upper() == "Q":
            return

        if index in SELECTED_NBA_SET:
            print("已下载，无法再继续下载，请重新选择！")
            continue

        group = total_nba_dict.get(index)
        if not group:
            print("序号不存在，请重新选择")
            continue

        file_path = "{}.mp4".format(group["title"])
        download(file_path, group["url"])

        SELECTED_NBA_SET.add(index)


print("欢迎使用xxx系统")
func_dict = {
    "1": download_image,
    "2": download_video,
    "3": download_nba
}
while True:
    print("1.花瓣网图片专区;2.抖音短视频专区;3.NBA锦集专区 ")
    choice = input("请选择序号：")
    if choice.upper() == "Q":
        break
    func = func_dict.get(choice)
    if not func:
        print("输入错误，请重新选择！")
        continue
    # 进入专区
    func()

21.资源下载器 v2版本

import requests

DB = {
    "1": {
        "area": "花瓣网图片专区",
        "total_dict": {
            "1": ("吉他男神", "https://hbimg.huabanimg.com/51d46dc32abe7ac7f83b94c67bb88cacc46869954f478-aP4Q3V"),
            "2": ("漫画美女", "https://hbimg.huabanimg.com/703fdb063bdc37b11033ef794f9b3a7adfa01fd21a6d1-wTFbnO"),
            "3": ("游戏地图", "https://hbimg.huabanimg.com/b438d8c61ed2abf50ca94e00f257ca7a223e3b364b471-xrzoQd"),
            "4": ("alex媳妇", "https://hbimg.huabanimg.com/4edba1ed6a71797f52355aa1de5af961b85bf824cb71-px1nZz"),
        },
        "ext": "png",
        "selected": set()
    },
    "2": {
        "area": "抖音短视频专区",
        "total_dict": {
            "1": {"title": "东北F4模仿秀",
                  'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0300f570000bvbmace0gvch7lo53oog"},
            "2": {"title": "卡特扣篮",
                  'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200f3e0000bv52fpn5t6p007e34q1g"},
            "3": {"title": "罗斯mvp",
                  'url': "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0200f240000buuer5aa4tij4gv6ajqg"},
        },
        "ext": "mp4",
        "selected": set()
    },
    "3": {
        "area": "NBA锦集专区",
        "total_dict": {
            "1": {"title": "威少奇才首秀三双",
                  "url": "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0300fc20000bvi413nedtlt5abaa8tg&ratio=720p&line=0"},
            "2": {"title": "塔图姆三分准绝杀",
                  "url": "https://aweme.snssdk.com/aweme/v1/playwm/?video_id=v0d00fb60000bvi0ba63vni5gqts0uag&ratio=720p&line=0"}
        },
        "ext": "mp4",
        "selected": set()
    },
}


def download(file_path, url):
    res = requests.get(
        url=url,
        headers={
            "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 FS"
        }
    )
    with open(file_path, mode='wb') as f:
        f.write(res.content)


def handler(area_info):
    # 进入专区提醒
    summary = "欢迎进入{}".format(area_info['area'])
    print(summary)

    # 专区中选择下载
    while True:
        text_list = []
        for num, item in area_info['total_dict'].items():
            if num in area_info['selected']:
                continue
            if type(item) == tuple:
                data = "{}.{}".format(num, item[0])
            else:
                data = "{}.{}".format(num, item["title"])
            text_list.append(data)
        if text_list:
            text = ";".join(text_list)
        else:
            text = "无可下载选项"

        print(text)
        index = input("请输入要选择的序号(Q/q退出）：")
        if index.upper() == "Q":
            return

        if index in area_info['selected']:
            print("已下载，无法再继续下载，请重新选择！")
            continue

        group = area_info['total_dict'].get(index)
        if not group:
            print("序号不存在，请重新选择")
            continue

        if type(group) == tuple:
            title, url = group
        else:
            title, url = group['title'], group['url']

        file_path = "{}.{}".format(title, area_info['ext'])
        download(file_path, url)

        area_info['selected'].add(index)


print("欢迎使用xxx系统")
while True:
    print("1.花瓣网图片专区;2.抖音短视频专区;3.NBA锦集 专区 ")
    choice = input("请选择序号（Q/q退出）：")
    if choice.upper() == "Q":
        break

    # 选择序号： 去db中找对应的字典信息
    area_dict = DB.get(choice)

    if not area_dict:
        print("输入错误，请重新选择！")
        continue

    # 进入专区（area_dict选择的专区信息）
    handler(area_dict)

posted @ 2022-02-12 19:26 林夕321 阅读(45) 评论(0) 收藏举报

刷新页面返回顶部

纸上得来终觉浅，绝知此事要躬行.
Talk is cheap. Show me the code. 悟已往之不谏，知来者之可追。实迷途其未远，觉今是而昨非.

2.2 作业答案

1.如何查看一个值得内存地址？

2.函数的参数传递的是引用（内存地址）还是值（拷贝一份）？

3.看代码写结果

4.看代码写结果

5.看代码写结果

6. 简述第5题、第6题的结果为何结果不同。

7.看代码写结果

8.看代码写结果

9.补充代码，实现获取天气信息并按照指定格式写入到文件中。【重点讲】

10.看代码写结果

11.看代码写结果

12.看代码写结果

13.看代码写结果

14.看代码写结果

15.分析代码，写结果

16.两个结果输出的分别是什么？并简述其原因。

17.看代码结果

18.看代码结果

19.看代码写结果

20.看代码写结果

21.资源下载器 v1版本【重点讲】

21.资源下载器 v2版本

公告

纸上得来终觉浅，绝知此事要躬行.Talk is cheap. Show me the code. 悟已往之不谏，知来者之可追。实迷途其未远，觉今是而昨非.

2.2 作业答案

1.如何查看一个值得内存地址？

2.函数的参数传递的是引用（内存地址）还是值（拷贝一份）？

3.看代码写结果

4.看代码写结果

5.看代码写结果

6. 简述第5题、第6题的结果为何结果不同。

7.看代码写结果

8.看代码写结果

9.补充代码，实现获取天气信息并按照指定格式写入到文件中。【重点讲】

10.看代码写结果

11.看代码写结果

12.看代码写结果

13.看代码写结果

14.看代码写结果

15.分析代码，写结果

16.两个结果输出的分别是什么？并简述其原因。

17.看代码结果

18.看代码结果

19.看代码写结果

20.看代码写结果

21.资源下载器 v1版本【重点讲】

21.资源下载器 v2版本

公告

纸上得来终觉浅，绝知此事要躬行.
Talk is cheap. Show me the code. 悟已往之不谏，知来者之可追。实迷途其未远，觉今是而昨非.