Question

Assume you have a Pandas DataFrame (df) of shape (5,5) with the following column names and row (index) values:
df.columns = ['a','b','c','d','e']
df.index = [0,1,2,3,4]
Assuming  col_list=['a','b','d']
set x = df.loc[:,col_list]

What does x contain?

Answer 1

a b d

0

1

2

3

4

The output is is in above format

all the rows from 0 to 4 of column a b and d are assigned to x

Example code:

import pandas as pd
import numpy as np
M = np.random.rand(5, 5)
df = pd.DataFrame(M)
df.columns = ['a','b','c','d','e']
df.index = [0,1,2,3,4]
col_list=['a','b','d']
x = df.loc[:,col_list]
print(x)

Output:

di lui - a b d 0 0.865526 0.205591 0.435677 1 0.867564 0.275700 0.302082 2 0.188591 0.805332 0.445512 30.976305 0.234343 0.887475 4 0.984308 0.527743 0.573780 Process finished with exit code @