Function find_source_lines

IPython/core/oinspect.py:352–381

Find the line number in a file where an object was defined. This is essentially a robust wrapper around `inspect.getsourcelines`. Returns None if no file can be found. Parameters ---------- obj : any Python object Returns ------- lineno : int The line numb

(obj)

def find_source_lines(obj):
    """Find the line number in a file where an object was defined.

    This is essentially a robust wrapper around `inspect.getsourcelines`.

    Returns None if no file can be found.

    Parameters
    ----------
    obj : any Python object

    Returns
    -------
    lineno : int
        The line number where the object definition starts.
    """
    obj = _get_wrapped(obj)

    try:
        lineno = inspect.getsourcelines(obj)[1]
    except TypeError:
        # For instances, try the class object like getsource() does
        try:
            lineno = inspect.getsourcelines(obj.__class__)[1]
        except (OSError, TypeError):
            return None
    except OSError:
        return None

    return lineno


_sentinel = object()