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import sys
# Passthrough for builtins supported with py27.
BaseException = BaseException
GeneratorExit = GeneratorExit
_sysex = (KeyboardInterrupt, SystemExit, MemoryError, GeneratorExit)
all = all
any = any
callable = callable
enumerate = enumerate
reversed = reversed
set, frozenset = set, frozenset
sorted = sorted
if sys.version_info >= (3, 0):
exec("print_ = print ; exec_=exec")
import builtins
# some backward compatibility helpers
_basestring = str
def _totext(obj, encoding=None, errors=None):
if isinstance(obj, bytes):
if errors is None:
obj = obj.decode(encoding)
else:
obj = obj.decode(encoding, errors)
elif not isinstance(obj, str):
obj = str(obj)
return obj
def _isbytes(x):
return isinstance(x, bytes)
def _istext(x):
return isinstance(x, str)
text = str
bytes = bytes
def _getimself(function):
return getattr(function, '__self__', None)
def _getfuncdict(function):
return getattr(function, "__dict__", None)
def _getcode(function):
return getattr(function, "__code__", None)
def execfile(fn, globs=None, locs=None):
if globs is None:
back = sys._getframe(1)
globs = back.f_globals
locs = back.f_locals
del back
elif locs is None:
locs = globs
fp = open(fn, "r")
try:
source = fp.read()
finally:
fp.close()
co = compile(source, fn, "exec", dont_inherit=True)
exec_(co, globs, locs)
else:
import __builtin__ as builtins
_totext = unicode
_basestring = basestring
text = unicode
bytes = str
execfile = execfile
callable = callable
def _isbytes(x):
return isinstance(x, str)
def _istext(x):
return isinstance(x, unicode)
def _getimself(function):
return getattr(function, 'im_self', None)
def _getfuncdict(function):
return getattr(function, "__dict__", None)
def _getcode(function):
try:
return getattr(function, "__code__")
except AttributeError:
return getattr(function, "func_code", None)
def print_(*args, **kwargs):
""" minimal backport of py3k print statement. """
sep = ' '
if 'sep' in kwargs:
sep = kwargs.pop('sep')
end = '\n'
if 'end' in kwargs:
end = kwargs.pop('end')
file = 'file' in kwargs and kwargs.pop('file') or sys.stdout
if kwargs:
args = ", ".join([str(x) for x in kwargs])
raise TypeError("invalid keyword arguments: %s" % args)
at_start = True
for x in args:
if not at_start:
file.write(sep)
file.write(str(x))
at_start = False
file.write(end)
def exec_(obj, globals=None, locals=None):
""" minimal backport of py3k exec statement. """
__tracebackhide__ = True
if globals is None:
frame = sys._getframe(1)
globals = frame.f_globals
if locals is None:
locals = frame.f_locals
elif locals is None:
locals = globals
exec2(obj, globals, locals)
if sys.version_info >= (3, 0):
def _reraise(cls, val, tb):
__tracebackhide__ = True
assert hasattr(val, '__traceback__')
raise cls.with_traceback(val, tb)
else:
exec ("""
def _reraise(cls, val, tb):
__tracebackhide__ = True
raise cls, val, tb
def exec2(obj, globals, locals):
__tracebackhide__ = True
exec obj in globals, locals
""")
def _tryimport(*names):
""" return the first successfully imported module. """
assert names
for name in names:
try:
__import__(name)
except ImportError:
excinfo = sys.exc_info()
else:
return sys.modules[name]
_reraise(*excinfo)
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