I'm getting OSError: dlopen() failed to load a library: cairo / cairo-2 when trying to execute Django after a new install. Using Windows.
I'm using Weasyprint, seems to be related to that one, according to the full trace:
Unhandled exception in thread started by <function wrapper at 0x03F605B0> Traceback (most recent call last): File "C:\my-venv\lib\site-packages\django\utils\autoreload.py", line 226, in wrapper fn(*args, **kwargs) File "C:\my-venv\lib\site-packages\django\core\management\commands\runserver.py", line 109, in inner_run autoreload.raise_last_exception() File "C:\my-venv\lib\site-packages\django\utils\autoreload.py", line 249, in raise_last_exception six.reraise(*_exception) File "C:\my-venv\lib\site-packages\django\utils\autoreload.py", line 226, in wrapper fn(*args, **kwargs) File "C:\my-venv\lib\site-packages\django\__init__.py", line 18, in setup apps.populate(settings.INSTALLED_APPS) File "C:\my-venv\lib\site-packages\django\apps\registry.py", line 115, in populate app_config.ready() File "C:\my-venv\lib\site-packages\debug_toolbar\apps.py", line 15, in ready dt_settings.patch_all() File "C:\my-venv\lib\site-packages\debug_toolbar\settings.py", line 243, in patch_all patch_root_urlconf() File "C:\my-venv\lib\site-packages\debug_toolbar\settings.py", line 231, in patch_root_urlconf reverse('djdt:render_panel') File "C:\my-venv\lib\site-packages\django\core\urlresolvers.py", line 568, in reverse app_list = resolver.app_dict[ns] File "C:\my-venv\lib\site-packages\django\core\urlresolvers.py", line 360, in app_dict self._populate() File "C:\my-venv\lib\site-packages\django\core\urlresolvers.py", line 293, in _populate for pattern in reversed(self.url_patterns): File "C:\my-venv\lib\site-packages\django\utils\functional.py", line 33, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\my-venv\lib\site-packages\django\core\urlresolvers.py", line 417, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "C:\my-venv\lib\site-packages\django\utils\functional.py", line 33, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\my-venv\lib\site-packages\django\core\urlresolvers.py", line 410, in urlconf_module return import_module(self.urlconf_name) File "C:\Python27\Lib\importlib\__init__.py", line 37, in import_module __import__(name) File "C:\my-project\project\urls.py", line 9, in <module> from utils.views import site_info, nav_autocomplete File "C:\my-project\utils\views.py", line 24, in <module> import weasyprint File "C:\my-venv\lib\site-packages\weasyprint\__init__.py", line 338, in <module> from .css import PARSER, preprocess_stylesheet # noqa File "C:\my-venv\lib\site-packages\weasyprint\css\__init__.py", line 30, in <module> from . import computed_values File "C:\my-venv\lib\site-packages\weasyprint\css\computed_values.py", line 18, in <module> from .. import text File "C:\my-venv\lib\site-packages\weasyprint\text.py", line 18, in <module> import cairocffi as cairo File "C:\my-venv\lib\site-packages\cairocffi\__init__.py", line 46, in <module> cairo = dlopen(ffi, 'cairo', 'cairo-2') File "C:\my-venv\lib\site-packages\cairocffi\__init__.py", line 43, in dlopen raise OSError("dlopen() failed to load a library: %s" % ' / '.join(names)) OSError: dlopen() failed to load a library: cairo / cairo-2