KeyError: False pandas dataframe

Question

Look at the following code:

import pandas as pd
data = pd.read_csv("list.csv")
class_names = data.classname.unique()
for ic in class_names:
print(data['classname' == ic])

It says "KeywordError: False" at print(data['classname' == ic])

But it prints the output if classname value is given directly as shown below

print(data['classname'] == 'c1')

What could be the problem?

You put the bracket in a wrong position. Must be data['classname']==ic — DYZ
– DYZ, Commented Jan 9, 2019 at 5:28

Rarblack · Accepted Answer · 2019-01-09 05:44:56Z

2

The location of the square bracket is placed in the wrong place.

print(data['classname'] == ic)

answered Jan 9, 2019 at 5:44

Rarblack

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Comments

Mohit Motwani · Accepted Answer · 2019-01-09 06:04:51Z

1

If you want to print data related to a particular classname try:

for ic in class_names:
    print(data[data['classname'] == ic]])

It will return the dataframe with the ic classname

data['classname']==ic will only return a boolean series

answered Jan 9, 2019 at 6:04

Mohit Motwani

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