Modified version of the function from Dive Into Python.

info.py

def info(obj, spacing=10, collapse=True):
    """Print methods and doc strings.
    :param obj: object to inspect
    :type obj: module or class or list or dict or str or unicode
    :param spacing: left column width
    :type spacing: int
    :param collapse: whether to collapse the text when printing
    :type collapse: bool
    """
    # Modified version of the function from Dive Into Python.
    # http://www.diveintopython.net/power_of_introspection/index.html#apihelper.divein
    # Governed by the Python License. https://docs.python.org/2/license.html
    assert isinstance(spacing, int) and spacing > 0
    method_list = [method for method in dir(obj) if callable(getattr(obj, method))]
    process_func = collapse and (lambda s: ' '.join(s.split())) or (lambda s: s)
    print('\n'.join(['{} {}'.format(
        method.ljust(spacing), process_func(str(getattr(obj, method).__doc__))) for method in method_list]))