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

2 votes228 views6 answers
Boolean in python
Python
1 vote210 views1 answer
Get current site django
Python
1 vote171 views3 answers
Python count hex
Python
0 vote182 views1 answer
Python capitilize
Python
0 vote262 views1 answer
How to insert value in admin panel in django
Python Django
0 vote221 views1 answer
Pandas get only entries that match list
Python
28 votes163 views1 answer
'utf-8' codec can't decode byte 0x85 in position 715: invalid start byte
Python
3 votes184 views1 answer
Make length string in pandas
Python
23 votes170 views3 answers
Django drf
Python
99 votes175 views6 answers
How to make python file executable
Python