Pandas DataFrame lt() method with examples

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The lt() method compare each value in a DataFrame to check if it is less than a specified value, or a value from a specified DataFrame objects, and returns a DataFrame with boolean True/False for each comparison.

Syntax – 

DataFrame.lt(other, axis='columns', level=None)

other – Any single or multiple element data structure, or list-like object.

axis – Whether to compare by the index (0 or ‘index’) or columns (1 or ‘columns’).

level – Broadcast across a level, matching Index values on the passed MultiIndex level.

Examples –

Let’s create a dataframe.

import pandas as pd

data = {'Apple':[89, 89, 90, 110, 125, 84, 131, 123, 123, 140, 145, 145],
       'Orange': [46, 46, 50, 65, 63, 48, 110, 120, 60, 42, 47, 62],
       'Banana': [26, 30, 30, 25, 38, 22, 22, 36, 20, 27, 23, 34 ],
       'Mango': [80, 80, 90, 125, 130, 150, 140, 140, 135, 135, 80, 90]}

index = ['Jan','Feb','Mar','Apr','May','June','Jul','Aug','Sep','Oct','Nov','Dec']
df = pd.DataFrame(data, index=index)
df

1 . Comparing a DataFrame with a Single Value using DataFrame.lt() method –

Let’s say you want to know which values in the dataframe are less than 100. For this you can use the lt() method.

df.lt(100)

2 . Comparing a Series with another series using DataFrame.lt() method –

You can also compare a series with another series.

df['Apple'].lt(df['Mango'])

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