相关试卷

import pandas as pd

df=pd.read_excel ("数据集 A.xlsx")

cp=["小炒时蔬","红烧牛肉","黄焖鸡","红烧肉","粉蒸肉","梅菜扣肉","糖醋排骨 ","烧圆子","小炒肉","水煮肉片","香菇炒肉","鱼香肉丝","烤鸭","香酥鸭","烧 带鱼","炸小鱼","大锅菜","番茄鸡蛋","麻婆豆腐","凉拌黄瓜"]

cpdic={"小炒时蔬":0,"红烧牛肉":1,"黄焖鸡":2,"红烧肉":3,"粉蒸肉":4,"梅菜扣 肉":5,"糖醋排骨":6,"烧圆子":7,"小炒肉":8,"水煮肉片":9,"香菇炒肉":10,"鱼香 肉丝":11,"烤鸭":12,"香酥鸭":13,"烧带鱼":14,"炸小鱼":15,"大锅菜":16,"番茄 鸡蛋":17,"麻婆豆腐":18,"凉拌黄瓜":19}

a=[]

for i in df.values:

    # 列表 a 分别存储订单编号、菜品 id、菜品名称

    a.append([i[2],i[4],i[5]])

n,ncp=len(a),len(cp)

num=[0]*ncp

j=0

cpmc=input("请输入菜品：")

key=cpdic[cpmc]         # 通过菜品名称获取菜品 id

while j<n:

    if j==0 or a[j-1][0]!=a[j][0]:

        start=j

    if a[j][1]==key:

        while a[j][0]==a[start][0]:

            if start!=j:

                num[ ]+=1

            start+=1

            if start==n:

                break

              # 改错

    j+=1

for i in range(3):    # 输出三个套餐搭配建议

    for j in range(ncp-1,i,-1):

        if  :

            num[j-1],num[j]=num[j],num[j-1]

            cp[j-1],cp[j]=cp[j],cp[j-1]

print("建议套餐中包含",cpmc,"与",cp[i],"，两个菜品关联次数为",num[i])

①将“数据集B”中的“★”评价转换为数值评分

②舍弃“数据集B”中“年级”列数据

③修改“数据集A”中“序号”列数据，从1开始递增

④合并“数据集B”至“数据集A”

下列选项中，操作顺序正确的是（   ）（单选，填字母）

编写Python程序实现上述功能：

import pandas as pd

import matplotlib.pyplot as plt

df = pd.read_excel ("数据集 A.xlsx")

df =

plt.rcParams['font.sans-serif']=['SimHei']  #正常显示中文标签

plt.figure(figsize=(15,5))

x=df.菜品名称

y= _________________

plt.bar (x,y)

plt.title("菜品评分情况")

plt.xlabel("菜品名称")

plt.ylabel("平均评分")

for i,j in zip(x,y):   #设置图表标签

    plt.text(i,j+0.05,'%0.2f'%j,ha='center')

plt.show ()

加框处代码应为（   ）（单选，填字母）

b = [0,0,0,0,

        0,0,0,0,

        0,0,0,0,

        0,0,0,0 ]                        # 表示 4×4 方阵

time = input("输入时间(例：08:25 输入 0825)：")

    for i in range(len(time)):

        n =

        r2 = ""

        for j in range(4):               # 将数字转为 4 位二进制

            r2 =

            n //= 2

        for j in range(len(r2)):

            if r2[j] == "1":

                b[j * 4 + i] = 1

s = ""

print(time, "模拟结果：")

for i in range(len(b)):

    s += str(b[i]) + " "

    if  :

        print(s)

        s = ""

from math import sqrt

def prime(n):

    for i in range(2,int(sqrt(n)+1)):

        if n%i==0 :

            return False

    return True

for x in range(  ) :

    if prime(x):

        y=1;z=sqrt(x-1)

        while :

            y=y+1

            z=

        print(str(x)+"="+str(y)+"**2+"+str(int(z))+"**2")

import pandas as pd

import matplotlib.pyplot as plt

plt.rcParams['font.sans-serif']=['simhei'] #指定中文默认字体

df=pd.read_excel ("gxlqx.xlsx")

df=df[0:10]

以下选项中有两项是能实现加框处功能的，请选择并按正确顺序填写。

A . df=df.sort_values("最低分数线",ascending=True)

B . df=df.sort_values("2021 分数线",ascending=False)

C . df=df.groupby("2021 分数线",as_index=False).min()

D . df=df.groupby("学校",as_index=False).min()

x=df["学校"]

y=df["2021分数线"]

plt.title("2021年最低录取分数线排名的前10个学校")

plt.show ( )

def pure(s) :

     :

    if not "0"<=ch<="9":

        return False

psw=input("密码:")

if not 8<=len(psw)<=20 :

    print("密码长度为 8 到 20 位!")

print("密码不可以是纯数字!")