Warning in compat that support for Python 2 is ending

Resolves #1613

CHANGES.txt

@@ -1,6 +1,19 @@
 Changes
 =======
 
+1.1dev (TBD)
+------------
+
+Deprecations:
+
+- Support for Python 2 is deprecated and a warning is raised from the
+  rasterio.compat module. This module will be deleted in a future version.
+
+New features:
+
+- A new ``rasterio.transform.from_gcps()`` returns the Affine matrix that is a
+  best fit to given ground control points (#1749).
+
 1.0.28 (2019-09-09)
 -------------------
 

rasterio/__init__.py

@@ -42,7 +42,7 @@ import rasterio.path
 
 
 __all__ = ['band', 'open', 'pad', 'Env']
-__version__ = "1.0.28"
+__version__ = "1.1dev"
 __gdal_version__ = gdal_version()
 
 # Rasterio attaches NullHandler to the 'rasterio' logger and its

rasterio/compat.py

@@ -2,6 +2,7 @@
 
 import itertools
 import sys
+import warnings
 
 
 if sys.version_info[0] >= 3:   # pragma: no cover
@@ -15,6 +16,7 @@ if sys.version_info[0] >= 3:   # pragma: no cover
     from collections.abc import Iterable, Mapping
     from inspect import getfullargspec as getargspec
 else:  # pragma: no cover
+    warnings.warn("Python 2 compatibility will be removed after version 1.1", DeprecationWarning)
     string_types = basestring,
     text_type = unicode
     integer_types = int, long