Source code for past.types.basestring

An implementation of the basestring type for Python 3

Example use:

>>> s = b'abc'
>>> assert isinstance(s, basestring)
>>> from past.types import str as oldstr
>>> s2 = oldstr(b'abc')
>>> assert isinstance(s2, basestring)


import sys

from past.utils import with_metaclass, PY2

if PY2:
    str = unicode

ver = sys.version_info[:2]

class BaseBaseString(type):
    def __instancecheck__(cls, instance):
        return isinstance(instance, (bytes, str))

    def __subclasscheck__(cls, subclass):
        return super(BaseBaseString, cls).__subclasscheck__(subclass) or issubclass(subclass, (bytes, str))

[docs] class basestring(with_metaclass(BaseBaseString)): """ A minimal backport of the Python 2 basestring type to Py3 """
__all__ = ['basestring']