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

0 vote248 views1 answer
Django Signup form
Python Django
0 vote217 views1 answer
Command in python to make negative number positive
Python
0 vote228 views1 answer
Fluffy ancake recipe
Python
23 votes226 views4 answers
Python flat list from list of list
Python
3 votes230 views1 answer
Pandas reciprocal
Python
24 votes257 views2 answers
How to search for element in list python
Python
0 vote229 views1 answer
Item[0]: (i + 1) * 2 for i, item in (sort_loc)
Python
0 vote234 views1 answer
Python - convert a list column into miltiple columns
Python
11 votes272 views5 answers
Python discord mention user
Python
0 vote250 views1 answer
"DjangoJSONEncoder" is not defined
Python Django