import pyglet
window = pyglet.window.Window()

 Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\pyglet\__init__.py", line 353, in __getattr__
    return getattr(self._module, name)
AttributeError: 'NoneType' object has no attribute 'Window'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "C:\Python34\_mypy_\03.py", line 9, in <module>
    window = pyglet.window.Window()
  File "C:\Python34\lib\site-packages\pyglet\__init__.py", line 359, in __getattr__
    __import__(import_name)
  File "C:\Python34\lib\site-packages\pyglet\window\__init__.py", line 1877, in <module>
    from pyglet.window.win32 import Win32Window as Window
  File "C:\Python34\lib\site-packages\pyglet\window\win32\__init__.py", line 60, in <module>
    from pyglet.canvas.win32 import Win32Canvas
  File "C:\Python34\lib\site-packages\pyglet\canvas\__init__.py", line 64, in <module>
    from pyglet.app import WeakSet
  File "C:\Python34\lib\site-packages\pyglet\app\__init__.py", line 86, in <module>
    from pyglet.app.win32 import Win32EventLoop as PlatformEventLoop
  File "C:\Python34\lib\site-packages\pyglet\app\win32.py", line 41, in <module>
    from pyglet.libs.win32 import _kernel32, _user32, types, constants
  File "C:\Python34\lib\site-packages\pyglet\libs\win32\__init__.py", line 95, in <module>
    _dwmapi = DebugLibrary(windll.dwmapi)
  File "C:\Python34\lib\ctypes\__init__.py", line 421, in __getattr__
    dll = self._dlltype(name)
  File "C:\Python34\lib\ctypes\__init__.py", line 351, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] Не найден указанный модуль

 #...
# Fool py2exe, py2app into including all top-level modules (doesn't understand
# lazy loading)
if False:
    from . import app
    from . import canvas
    from . import clock
    from . import com
    from . import event
    from . import font
    from . import gl
    from . import graphics
    from . import input
    from . import image
    from . import lib
    from . import media
    from . import model
    from . import resource
    from . import sprite
    from . import text
    from . import window
# Hack around some epydoc bug that causes it to think pyglet.window is None.
# TODO: confirm if this is still needed
if False:
    from . import window
# строка 1877

 pip install pyglet

 >> help()
>> modules

 >> pip list

 from pyglet.window import Window
win = Window(width=640, height=480)