## unsafe_eval()


Evaluate a Python expression string and return the result.


Usage


``` python
unsafe_eval(expr)
```


Parses and evaluates the given expression string using Python's built-in `eval()` function.


## Parameters


`expr: str`  
A string containing a valid Python expression.


## Returns


`object`  
The result of evaluating the expression.


## Raises


`SyntaxError`  
If the expression string is not valid Python.

`NameError`  
If the expression references undefined names.


## Warnings

Never use with untrusted input. This function uses `eval()` internally and can execute arbitrary Python code. An attacker could craft an expression that deletes files, exfiltrates data, or compromises the system.


## Examples

``` python
>>> unsafe_eval("2 + 3")
```

5

``` python
>>> unsafe_eval("[i**2 for i in range(5)]")
```

\[0, 1, 4, 9, 16\]