Describe the bug

The local python executor is unable to execute a code line involving the built-in isinstance function

Code to reproduce the error

from smolagents import CodeAgent

agent = CodeAgent(
    model=...,
    tools=[],
    verbosity_level=2,
    max_steps=5,
)

rep = agent.run("Run `isinstance(5, int)`")

Error logs (if any)

Code execution failed at line 'result = isinstance(5, int)' due to: TypeError: isinstance() arg 2 must be a type, a tuple of types, or a union

Expected behavior
The isinstance function should work correctly

Packages version:
1.18.0

Additional context
Of course the code runs well in my local terminal with python.