# Python Pandas - Check if the interval is open on the left side

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To check if the interval is open on the left side, use the interval.open_left property. At first, import the required libraries −

import pandas as pd

Open interval set using the "closed" parameter with value "neither". An open interval (in mathematics denoted by square brackets) does not contains its endpoints, i.e. the open interval [0, 5] is characterized by the conditions 0 < x < 5

interval = pd.Interval(5, 20, closed='neither')

Display the interval

print("Interval...\n",interval)


Check whether the interval is open on the left side

print("\nCheck if the interval is open on the left side...\n",interval.open_left)

## Example

Following is the code

import pandas as pd

# Open interval set using the "closed" parameter with value "neither"
# An open interval (in mathematics denoted by square brackets) does not contains its endpoints,
# i.e. the open interval [0, 5] is characterized by the conditions 0 < x < 5.
interval = pd.Interval(5, 20, closed='neither')

# display the interval
print("Interval...\n",interval)

# the left bound
print("\nThe left bound for the Interval...\n",interval.left)

# the right bound
print("\nThe right bound for the Interval...\n",interval.right)

# display the interval length
print("\nInterval length...\n",interval.length)

# check whether the interval is open on the left side
print("\nCheck if the interval is open on the left side...\n",interval.open_left)

## Output

This will produce the following code

Interval...
(5, 20)

The left bound for the Interval...
5

The right bound for the Interval...
20

Interval length...
15

Check if the interval is open on the left side...
True