What does eval do When can it be used?
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What does eval do When can it be used?

What does eval do When can it be used?

This recipe explains what does eval do When can it be used

Recipe Objective

Suppose we have a code in form of string and we want to run it replacing values of variables. It can be achieved via eval function.

So this recipe is a short example on What does eval do and When can it be used. Let's get started.

Step 1 - Import the library

import pandas as pd

Let's pause and look at these imports. Pandas is generally used for performing mathematical operation and preferably over arrays.

Step 2 - Setup the Data

expression='x*(x+1)*(x+2)' x=4

Here we have setup one string and assigned a constant value to a variable.

Step 3 - Calculative eval()

eval(expression)

Simply pass the string expression into eval() function.

Step 4 - Let's look at our dataset now

Once we run the above code snippet, we will see:

120

Value of x has been simply passed into x for further calculation.

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