Function dumpObj

recipes/Python/137951_Dump_all_attributes/recipe-137951.py:5–153

Print a nicely formatted overview of an object. The output lines will be wrapped at maxlen, with lindent of space for names of attributes. A maximum of maxspew characters will be printed for each attribute value. You can hand dumpObj any data type -- a module, class, instance,

(obj, maxlen=77, lindent=24, maxspew=600)

        print format % (str(key)+':', val)

def dumpObj(obj, maxlen=77, lindent=24, maxspew=600):
    """Print a nicely formatted overview of an object.

    The output lines will be wrapped at maxlen, with lindent of space
    for names of attributes.  A maximum of maxspew characters will be
    printed for each attribute value.

    You can hand dumpObj any data type -- a module, class, instance,
    new class.

    Note that in reformatting for compactness the routine trashes any
    formatting in the docstrings it prints.

    Example:
       >>> class Foo(object):
               a = 30
               def bar(self, b):
                   "A silly method"
                   return a*b
       ... ... ... ... 
       >>> foo = Foo()
       >>> dumpObj(foo)
       Instance of class 'Foo' as defined in module __main__ with id 136863308
       Documentation string:   None
       Built-in Methods:       __delattr__, __getattribute__, __hash__, __init__
                               __new__, __reduce__, __repr__, __setattr__,       
                               __str__
       Methods:
         bar                   "A silly method"
       Attributes:
         __dict__              {}
         __weakref__           None
         a                     30
    """
    
    import types

    # Formatting parameters.
    ltab    = 2    # initial tab in front of level 2 text

    # There seem to be a couple of other types; gather templates of them
    MethodWrapperType = type(object().__hash__)

    #
    # Gather all the attributes of the object
    #
    objclass  = None
    objdoc    = None
    objmodule = '<None defined>'
    
    methods   = []
    builtins  = []
    classes   = []
    attrs     = []
    for slot in dir(obj):
        attr = getattr(obj, slot)
        if   slot == '__class__':
            objclass = attr.__name__