之前都没有意识到这个问题,就是pandas取某一行的值的问题
测试代码如下
import pandas as pd
import numpy as np
df pd.DataFrame({A: foo bar foo bar foo bar foo foo.split(),B: one one two three two two one three.split(),C: np.arange(8), D: np.arange…
答案 答案 答案
A. This code is correct. Line 8 creates a lambda expression that checks whether the age is less than 5, making option A correct. Since there is only one parameter and it does not specify a type, the parentheses around the parameter are …