python pandas切片列

Question

I have a pandas data structure with a shape of (500, 19).

dataset1 = pandas.read_csv(url, sep = ";", header = 0)

How can I slice the data vertically?

Example:

1,2,3
4,5,6
7,8,9

dataset1['slicing function to get second column'] yields:

2
5
8

Answer 1

Use iloc function but python counts from 0 , so for second column need 1 :

print (df.iloc[:, 1])
0    2
1    5
2    8
Name: 1, dtype: int64

For range:

print (df.iloc[:, 0:3])
   0  1  2
0  1  2  3
1  4  5  6
2  7  8  9