COMPAT: re-enable dateutil install from master

Author: jreback

ci/requirements-3.6_NUMPY_DEV.build.sh

@@ -12,10 +12,7 @@ PRE_WHEELS="https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf
 pip install --pre --upgrade --timeout=60 -f $PRE_WHEELS numpy scipy
 
 # install dateutil from master
-
-# TODO(jreback), temp disable dateutil master has changed
-# pip install -U git+git://github.com/dateutil/dateutil.git
-pip install python-dateutil
+pip install -U git+git://github.com/dateutil/dateutil.git
 
 # cython via pip
 pip install cython

pandas/compat/__init__.py

@@ -385,18 +385,23 @@ def raise_with_traceback(exc, traceback=Ellipsis):
 
 if PY2 and LooseVersion(dateutil.__version__) == '2.0':
     # dateutil brokenness
-    raise Exception('dateutil 2.0 incompatible with Python 2.x, you must '
-    'install version 1.5 or 2.1+!')
+    raise Exception("dateutil 2.0 incompatible with Python 2.x, "
+                    "you must install version 1.5 or 2.1+!")
 
-from dateutil import parser as _date_parser
-if LooseVersion(dateutil.__version__) < '2.0':
+try:
 
-    @functools.wraps(_date_parser.parse)
-    def parse_date(timestr, *args, **kwargs):
-        timestr = bytes(timestr)
-        return _date_parser.parse(timestr, *args, **kwargs)
-else:
-    parse_date = _date_parser.parse
+    from dateutil import parser as _date_parser
+    if LooseVersion(dateutil.__version__) < '2.0':
+
+        @functools.wraps(_date_parser.parse)
+        def parse_date(timestr, *args, **kwargs):
+            timestr = bytes(timestr)
+            return _date_parser.parse(timestr, *args, **kwargs)
+    else:
+        parse_date = _date_parser.parse
+except Exception as e:
+    print(e)
+    raise
 
 
 # https://github.com/pandas-dev/pandas/pull/9123