import pandas as pd

import matplotlib.pyplot as plt

#读取如图 b 所示数据，保存到 DataFrame 对象 df1 中，代码略

f = [9, 7, 6, 5, 4, 3, 2, 1]

for i in range(0，len(dfl)):

    rank = df1.at[i,"名次"] #通过行、列标签取单个值

    score = 0

    if rank <= 8:

    df1.at[i,"得分"] = score

df2 = dfl.groupby("    ▲    ",as_index=False).sum()       #分组求和

#设置绘图参数，代码略

plt.bar(x,y) #绘制柱形图

①请在程序中划线处填入合适的代码。

②程序的方框中应填入的正确代码为 （单选，填字母）

A.x = df1["专业"]

y = df1["总分"]

B.x = df2["专业"]

y = df2["得分"]

C.df1["专业"] = "专业"

df1["总分"] = "总分"

D.Df2["专业"] = "专业"

Df2["得分"] = "得分"

def qj(l,r,a):        #将二进制 a 转成对应的经纬度范围#该代码省略

def find(c):        #在 base32 表中查找对应的十进制数

    for i in :

        if base32[i]==c:

            return i base32="0123456789bcdefghjkmnpqrstuvwxyz" s=input("请输入编码：")

res="" jd=[]

wd=[]

for i in range(len(s)):

    ans=""

    j=0

    while:

        ans=

        n=n//2

        j+=1

    res=res+ans

for i in range(len(res)):

    if i%2==0:

        jd+=res[i]

    else:

        wd+=res[i]

print("经度对应的二进制:",jd,"纬度对应的二进制:",wd)

print("经度范围：",qj(-180,180,jd),"纬度范围：",qj(-90,90,wd))

def isprime(m):

    i=2

    while i<=int(m**0.5):

        if:

            return False

        i+=1

    return True

for i in range(4, 1001, 2):

    flag=False

    for j in range(2, i):

        if:

            print(str(i)+"验证成功")

            flag=True

            break

    if:

        print(str(i)+"验证失败")