Answer 1

Relevant post(s):

https://www.sololearn.com/Discuss/1274479/?ref=app
https://www.sololearn.com/discuss/1202365/?ref=app

"...
It is an interesting hack/utility in Python which lets a Python program run Python code within itself.

The eval() method parses the expression passed to it and runs python expression(code) within the program.

The syntax of eval is:

eval(expression, globals=None, locals=None) expression: this string is parsed and evaluated as a Python expressionglobals (optional): a dictionary to specify the available global methods and variables.locals (optional): another dictionary to specify the available local methods and variables.
... "

Source: https://www.google.co.in/amp/s/www.geeksforgeeks.org/eval-in-python/amp/