A、s
D、ata
E、ad()csv('1.csv')(1)
F、rame,按照要求编写代码:import pandas as pddf = pd.read()csv('1.csv')(1) 输出df的末10行;(2) 输出df的前5行;(3) 输出df的前4行前5列的内容;我的
答案：A
A、s
D、ata
E、ad()csv('1.csv')(1)
F、rame,按照要求编写代码:import pandas as pddf = pd.read()csv('1.csv')(1) 输出df的末10行;(2) 输出df的前5行;(3) 输出df的前4行前5列的内容;我的
答案：A
A. ls = [['Tom', 24], ['Jack', 18], ['Ada', 20]]ls.sort()print(ls)
B. ls = [['Tom', 24], ['Jack', 18], ['Ada', 20]]ls.sort(key=lambda x: x[1])print(ls)
C. ls = [['Tom', 24], ['Jack', 18], ['Ada', 20]]ls.sort(key=lambda x: x[0])print(ls)
D. ls = [['Tom', 24], ['Jack', 18], ['Ada', 20]]ls.sort(key=lambda x: x[2])print(ls)
A. 5050
B. 4950
C. 450
D. 45
A. 机器语言
B. 汇编语言
C. 高级语言
D. 科学计算语言
A. " What's happened to you?"
B. ' What's happened to you?'
C. ' What\\'s happened to you?'
D. "" Oh! " It sounds terrible."
A. {2:'two', 3:'One', 1:'one'}
B. {2:'two', 3:'three', 1:'One'}
C. {2:'two', 3:'three', 1:'one', 1:'One'}
D. {2:'One', 3:'three', 1:'one'}
A. 8 2
B. 8,2
C. 8 3 2
D. 8,3,2
解析：答案解析:
A. 已成年!
B. 未成年!
C. 程序运行错误
D. None
解析：答案解析:
A. s = {}
B. s = set()
C. s = ()
D. s = dict()
