[v4 integration] Remove future flags (#1594)

* Init all future flags as enabled
* Remove future flag disabled logic
* Update v4 template colors
* Remove deprecated imports, replace with error pointing to chart_studio package
* Remove future flag specifications from tests
* Fix test_core tests for v4 functionality
* Update test_optional tests for v4 behavior
* Remove test_plotly tests from the plotly project these still live in the chart_studio project
* Disable template for test_offline tests
* Update expected JSON encoding of Column dates
* Only enable 'browser' default renderer if default browser can be found
* Fix orca image renderers test
* Fix JSON encoding tests
* Disable template in orca image tests

Author: jonmmease

_plotly_future_/__init__.py

@@ -1,7 +1,18 @@
 import warnings
 import functools
 
-_future_flags = set()
+# Initialize _future_flags with all future flags that are now always in
+# effect.
+_future_flags = {
+    'renderer_defaults',
+    'template_defaults',
+    'extract_chart_studio',
+    'remove_deprecations',
+    'v4_subplots',
+    'orca_defaults',
+    'timezones',
+    'trace_uids',
+}
 
 
 def _assert_plotly_not_imported():
@@ -19,13 +30,20 @@ def _assert_plotly_not_imported():
 
 
 def _chart_studio_warning(submodule):
-    if 'extract_chart_studio' in _future_flags:
-        warnings.warn(
-            'The plotly.{submodule} module is deprecated, '
-            'please use chart_studio.{submodule} instead'
-                .format(submodule=submodule),
-            DeprecationWarning,
-            stacklevel=2)
+    warnings.warn(
+        'The plotly.{submodule} module is deprecated, '
+        'please use chart_studio.{submodule} instead'
+            .format(submodule=submodule),
+        DeprecationWarning,
+        stacklevel=2)
+
+
+def _chart_studio_error(submodule):
+    raise ImportError("""
+The plotly.{submodule} module is deprecated,
+please install the chart_studio package and use the
+chart_studio.{submodule} module instead. 
+""".format(submodule=submodule))
 
 
 def _chart_studio_deprecation(fn):
@@ -43,15 +61,14 @@ def _chart_studio_deprecation(fn):
 
     @functools.wraps(fn)
     def wrapper(*args, **kwargs):
-        if 'extract_chart_studio' in _future_flags:
-            warnings.warn(
-                msg,
-                DeprecationWarning,
-                stacklevel=2)
+        warnings.warn(
+            msg,
+            DeprecationWarning,
+            stacklevel=2)
 
         return fn(*args, **kwargs)
 
     return wrapper
 
 
-__all__ = ['_future_flags', '_chart_studio_warning']
+__all__ = ['_future_flags', '_chart_studio_error']

_plotly_future_/extract_chart_studio.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('extract_chart_studio')

_plotly_future_/orca_defaults.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('orca_defaults')

_plotly_future_/remove_deprecations.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('remove_deprecations')

_plotly_future_/renderer_defaults.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('renderer_defaults')

_plotly_future_/template_defaults.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('template_defaults')

_plotly_future_/timezones.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('timezones')

_plotly_future_/trace_uids.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('trace_uids')

_plotly_future_/v4.py

@@ -1,12 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import (
-    renderer_defaults,
-    template_defaults,
-    extract_chart_studio,
-    remove_deprecations,
-    v4_subplots,
-    orca_defaults,
-    timezones,
-    trace_uids,
-)
-

_plotly_future_/v4_subplots.py

@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-from _plotly_future_ import _future_flags, _assert_plotly_not_imported
-
-_assert_plotly_not_imported()
-_future_flags.add('v4_subplots')