def from_name(cls, name=None):
"""
Connect to the display with the given ``name``.
``name`` is a byte or unicode string containing the name of a display
(e.g. ``':0'``). If ``name`` is ``None``, the value of ``$DISPLAY`` is
used.
If ``name`` refers to a non-existing display, or if ``name`` is empty
and ``$DISPLAY`` is empty or refers to a non-existing display, the
display connection fails, and :exc:`DisplayError` is raised.
Return a :class:`Display` object representing the connection to the
display. Raise :exc:`DisplayError`, if no display could be opened.
"""
if name is not None:
name = ensure_byte_string(name)
return cls(xlib.open_display(name))
def from_name(cls, name=None):
"""
Connect to the display with the given ``name``.
``name`` is a byte or unicode string containing the name of a display
(e.g. ``':0'``). If ``name`` is ``None``, the value of ``$DISPLAY`` is
used.
If ``name`` refers to a non-existing display, or if ``name`` is empty
and ``$DISPLAY`` is empty or refers to a non-existing display, the
display connection fails, and :exc:`DisplayError` is raised.
Return a :class:`Display` object representing the connection to the
display. Raise :exc:`DisplayError`, if no display could be opened.
"""
if name is not None:
name = ensure_byte_string(name)
return cls(xlib.open_display(name))
def test_open_display():
display = xlib.open_display(None)
assert display
xlib.close_display(display)
def test_open_display_no_display():
with mock.patch.dict(os.environ, {}, clear=True):
assert not xlib.open_display(None)
