all Python 3inspectfunction

inspect.isbuiltin()

object kind checks

Checks that an object is a built-in C function (len, math.sqrt) or a bound method of a built-in type ([].append).

Syntax

inspect.isbuiltin(object) -> bool

'Built-in' here means 'written in C', not 'from the standard library': json.dumps is written in Python, so isbuiltin gives False. An unbound method of a built-in type (list.append) is a method descriptor, not a builtin, and neither are built-in classes like int and list. It is handy for picking functions of a C module: getmembers(math, inspect.isbuiltin).

Examples

import inspect, json
print(inspect.isbuiltin(len), inspect.isbuiltin([].append))  # → True True
print(inspect.isbuiltin(list.append), inspect.isbuiltin(json.dumps))  # → False False
print(inspect.isbuiltin(int))  # → False — это класс

See also

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