Replace 'cairocffi' by 'pycairo'

.travis.yml

@@ -3,7 +3,7 @@ python:
   - "3.6"
 # command to install dependencies
 before_install:
-  - sudo apt-get install libcairo2-dev python-dev libffi-dev
+  - sudo apt-get install libcairo2-dev pkg-config python3-dev
   - pip install pytest coveralls pytest-cov pillow
   - pip install -e .
 # command to run tests

examples/roses.py

@@ -7,7 +7,10 @@
 
 import gizeh as gz
 import numpy as np
-from fractions import gcd
+try:
+    from fractions import gcd
+except ImportError:
+    from math import gcd
 
 def rose(d, n):
     """ Returns a polyline representing a rose of radius 1 """

gizeh/gizeh.py

@@ -1,7 +1,7 @@
 from copy import copy, deepcopy
 from base64 import b64encode
 import numpy as np
-import cairocffi as cairo
+import cairo
 from .geometry import (rotation_matrix,
                        translation_matrix,
                        scaling_matrix,

setup.py

@@ -20,5 +20,5 @@
     long_description=open('README.rst').read(),
     license='see LICENSE.txt',
     keywords="Cairo vector graphics",
-    install_requires=['cairocffi', 'numpy'],
+    install_requires=['pycairo', 'numpy'],
     packages= find_packages(exclude='docs'))