eval()

Execution

Evaluates a Python expression string and returns the result. Use with caution.

Signature

eval(expression, globals, locals)

Returns

any

Example

result = eval('2 + 3 * 4')
print(result)  # 14
x = 10
print(eval('x ** 2'))  # 100

About eval()

eval is a Python execution function with the signature eval(expression, globals, locals). Evaluates a Python expression string and returns the result. Use with caution. It returns a value of type any.

Python provides a rich set of built-in functions and standard library modules that cover common programming tasks. Understanding these functions helps you write more idiomatic, efficient Python code. The evalfunction is commonly used in data processing, web development, scripting, and automation tasks.

When working with eval(), consider edge cases like empty inputs, None values, and type mismatches. Python's duck typing means many built-in functions work with any object that implements the required protocol (e.g., __len__ for len(), __iter__ for iteration). This flexibility is a key strength of Python's design philosophy.

Related Functions

exec()compile()type()globals()