Maint: don't use travis python

.travis.yml

@@ -1,35 +1,42 @@
-language: python
-python:
-  - 2.7
-  - 3.4
-  - 3.5
-  - 3.6
+language: none
 matrix:
   include:
+    - env:
+      - PYTHON_VERSION=2.7
+    - env:
+      - PYTHON_VERSION=3.4
+    - env:
+      - PYTHON_VERSION=3.5
+    - env:
+      - PYTHON_VERSION=3.6
+    - env:
+      - PYTHON_VERSION=3.7
     # 0.14.0 is the last version with the old categorical system
     # libfortran=1.0 is needed to work around a bug in anaconda
     # (https://github.com/pydata/patsy/pull/83#issuecomment-206895923)
-    - python: 3.4
-      env: PANDAS_VERSION_STR="=0.14.0 libgfortran=1.0"
-    - python: 2.7
-      env: PANDAS_VERSION_STR="=0.14.0 libgfortran=1.0"
+    - env:
+      - PYTHON_VERSION=3.4
+      - PANDAS_VERSION_STR="=0.14.0 libgfortran=1.0"
+    - env:
+      - PYTHON_VERSION=2.7
+      - PANDAS_VERSION_STR="=0.14.0 libgfortran=1.0"
     # 0.18.0 has is_categorical_dtype in a different place than 0.19.0+
-    - python: 3.4
-      env: PANDAS_VERSION_STR="=0.18.0"
-    - python: 2.7
-      env: PANDAS_VERSION_STR="=0.18.0"
+    - env:
+      - PYTHON_VERSION=3.4
+      - PANDAS_VERSION_STR="=0.18.0"
+    - env:
+      - PYTHON_VERSION=2.7
+      - PANDAS_VERSION_STR="=0.18.0"
     # make sure it works without pandas
-    - python: 3.6
-      env: PANDAS_VERSION_STR="NONE"
-    - python: 2.7
-      env: PANDAS_VERSION_STR="NONE"
-    - python: 3.7
-      sudo: true
-      dist: xenial
-    - python: 3.7
-      sudo: true
-      dist: xenial
-      env: PANDAS_VERSION_STR="NONE"
+    - env:
+      - PYTHON_VERSION=2.7
+      - PANDAS_VERSION_STR="NONE"
+    - env:
+      - PYTHON_VERSION=3.6
+      - PANDAS_VERSION_STR="NONE"
+    - env:
+      - PYTHON_VERSION=3.7
+      - PANDAS_VERSION_STR="NONE"
 
 # This disables sudo, but makes builds start much faster
 # See http://blog.travis-ci.com/2014-12-17-faster-builds-with-container-based-infrastructure/
@@ -49,7 +56,7 @@ before_install:
   - conda info -a
   - export PKGS="numpy scipy coverage nose pip"
   - if [ "$PANDAS_VERSION_STR" != "NONE" ]; then export PKGS="${PKGS} pandas${PANDAS_VERSION_STR}"; fi
-  - conda create -q -n testenv python=$TRAVIS_PYTHON_VERSION ${PKGS}
+  - conda create -q -n testenv python=$PYTHON_VERSION ${PKGS}
   - source activate testenv
 install:
   - python setup.py sdist

tools/check-API-refs.py

@@ -9,7 +9,9 @@
 root = dirname(dirname(abspath(__file__)))
 patsy_ref = root + "/doc/API-reference.rst"
 
-doc_re = re.compile("^\\.\\. (.*):: ([^\\(]*)")
+doc_re = re.compile(r"^\.\. (.*):: ([^\(]*)")
+
+
 def _documented(rst_path):
     documented = set()
     for line in open(rst_path):
@@ -21,14 +23,15 @@ def _documented(rst_path):
                 documented.add(symbol)
     return documented
 
+
 try:
     import patsy
 except ImportError:
     sys.path.append(root)
     import patsy
 
 documented = set(_documented(patsy_ref))
-#print(documented)
+# print(documented)
 exported = set(patsy.__all__)
 missed = exported.difference(documented)
 extra = documented.difference(exported)