Convert a python 'type' object to a string


I’m wondering how to convert a python ‘type’ object into a string using python’s reflective capabilities.

For example, I’d like to print the type of an object

print("My type is " + type(some_object))  # (which obviously doesn't work like this)
Asked By: Rehno Lindeque




If that doesn’t suit you, use this:



class A:
# prints <type 'instance'>
# prints A

Also, it seems there are differences with type() when using new-style classes vs old-style (that is, inheritance from object). For a new-style class, type(someObject).__name__ returns the name, and for old-style classes it returns instance.

Answered By: Gabi Purcaru
>>> class A(object): pass

>>> e = A()
>>> e
<__main__.A object at 0xb6d464ec>
>>> print type(e)
<class '__main__.A'>
>>> print type(e).__name__

what do you mean by convert into a string? you can define your own repr and str_ methods:

>>> class A(object):
    def __repr__(self):
        return 'hei, i am A or B or whatever'

>>> e = A()
>>> e
hei, i am A or B or whatever
>>> str(e)
hei, i am A or B or whatever

or i dont know..please add explainations 😉

Answered By: Ant
print("My type is %s" % type(someObject)) # the type in python


print("My type is %s" % type(someObject).__name__) # the object's type (the class you defined)
Answered By: Fisher

By using the str() function you can do this.

 typeOfOneAsString=str(type(1))  # changes the type to a string type
Answered By: Brian C.

In case you want to use str() and a custom str method. This also works for repr.

class TypeProxy:
    def __init__(self, _type):
        self._type = _type

    def __call__(self, *args, **kwargs):
        return self._type(*args, **kwargs)

    def __str__(self):
        return self._type.__name__

    def __repr__(self):
        return "TypeProxy(%s)" % (repr(self._type),)

>>> str(TypeProxy(str))
>>> str(TypeProxy(type("")))
Answered By: killjoy
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