If in df.columns

Check if column exists in dataframe

if 'A' in df.columns:

Source: stackoverflow.com

Check if column exists in dataframe python

if 'A' in df:

Source: stackoverflow.com

If in df.columns

import pandas as pd

numbers = {'set_of_numbers': [1,2,3,4,5,6,7,8,9,10]}
df = pd.DataFrame(numbers,columns=['set_of_numbers'])

df['equal_or_lower_than_4?'] = df['set_of_numbers'].apply(lambda x: 'True' if x <= 4 else 'False')

print (df)

Source: datatofish.com

Similar codes

1 vote327 views1 answer
Joining two lists in python using for loop
Python
11 votes371 views2 answers
Sending whatsapp message using python
Python
1 vote311 views1 answer
Python remove none from dict
Python
9 votes329 views3 answers
Python array from 1 to n
Python
0 vote305 views1 answer
Racine carré python
Python
0 vote389 views1 answer
Django template limit string length
Python Django
2 votes323 views1 answer
Python dir all files
Python
0 vote310 views1 answer
How to print the text new line instead of n in jupyter notebook
Python
1 vote318 views2 answers
Index to datetime pandas
Python
3 votes330 views2 answers
Scapy python import
Python