What is eval in python

The eval() function in python is used to execute a string expression and return the value of the expression.

The following is the syntax of the eval() method:

eval(expression[, globals[, locals]])

Parameters

expression -- Expression.

globals -- Variable scope, global namespace, if provided, must be a dictionary object.

locals -- Variable scope, local namespace, if provided, can be any mapping object.

Return value

Returns the expression calculation result.

The following shows an example of using the eval() method:

>>>x = 7 >>> eval( '3 * x' ) 21 >>> eval('pow(2,2)') 4 >>> eval('2 + 2') 4 >>> n=81 >>> eval("n + 4") 85

Related recommendations: "Python Tutorial"

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