import pandas as pd df = pd.DataFrame([[0 , 1 , 2 ],[ 3 , 4 , 5 ] , [ 6 , 7 , 8 ] , columns = [ 'a' , 'b' , 'c']) 下列关于 DataFrame的索引表示错误的是 A df ['b'] B df [1] C df [:2] D df [:1][['a','c']] ...
import pandas as pd data=[[88,89,96],[95,93,92],[90,87,95]] df1=pd.DataFrame(data,index=[“小明”, “小红”,“小兰”],columns=[“语文”,“数学”,“英语”]) 下列操作及描述不正确的是( ) A. print(df1[“英语”])输出英语列的数据 B. print(df1.数学)输出数学列的数据 C. prin...
在Python中创建了一个DataFrame对象df1。 import pandas as pd data={"姓名":["甲","乙","丙"],"性别":["男","女","男"],"身高":[175,156,180]} df1=pd.DataFrame(data,columns=["姓名","性别",身高"]) 以下操作描述错误的是( ) A. print(df1["姓名"])将显示姓名列的数据 B. print(df...
import pandas as pd s1 = pd. Series (["学习", "运动", "睡觉", "吃饭"], index = ["01", "02", "03", "04"]) sl ["03"] = "休息" bm = s1. index sub = s1. values time = [40,90,79,30] num = [13,2,10,3] col = ["活动", "时长", "次数"] ...
# 导入pandas库并将其命名为pd import pandas as pd # 从'items.csv'文件中读取数据,使用逗号作为分隔符,并存储在名为items的DataFrame中 items = pd.read_csv('items.csv', sep=',') # 从'signup.csv'文件中读取数据,使用逗号作为分隔符,并存储在名为signup的DataFrame中 signup = pd.read_csv('sign...
import pandas as pd df = pd.DataFrame([ [1, 1, 2, 2], [1, 1, 1, 1], [1, 1, 1, 1], ]).T ,importpandasaspddf=pd.DataFrame([[1,1,2,2],[1,1,1,1],[1,1,1,1],]).Tdf.columns=[fr"col{i}"foriindf.columns]print(df.pivot_table(index=["col0"],
有如下Python程序段: import pandas as pd data={"姓名":["小芳","小唐","小王","小明"],"性别":["女","男","女","男"],"剩余积分":[16,12,13,10]} df1=pd.DataFrame(data,columns=["姓名","性别","剩余积分"]) df2=df1.head(2) df3=df1.tail(2)...
import pandas as pd data=[["小嘉","男",97],["小浙","男",89],["小温","女",98],["小华","女",89],["小杭","男",99]] df=pd.DataFrame(data,columns=["姓名","性别","成绩"]) 下列选项左侧语句与右侧输出结果不一致的是( ) A. print(df.groupby("性别",as_index=False).mean(...
有如下程序代码: import pandas as pd data={ '姓名':['李商隐','欧阳修','李白',杜甫'],'借阅次数': [ 32,16,30,26]} df1=pd. DataFrame (data, columns=[ '姓名','借阅次数']) c = 0 for i in range ( len (df1 ['姓名'])): if df1.at [i,'姓名'][0]= ='李':...
Df=Pd.DataFrame(data) 11、Df.index() df.columns() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 二、读取数据 12、df=pd.read_excel(r’C:\user…xlsx’,sheet_name=’sheet1’) 或 Pd.read_excel(r’C:\user…xlsx’,sheet_name=0) 读取excel表 ...