Properly reuse the "compat" unit

send2trash/compat.py

@@ -5,9 +5,14 @@
 # http://www.hardcoded.net/licenses/bsd_license
 
 import sys
-if sys.version < '3':
-    text_type = unicode
-    binary_type = str
-else:
+import os
+
+PY3 = sys.version_info[0] >= 3
+if PY3:
     text_type = str
     binary_type = bytes
+    environb = os.environb
+else:
+    text_type = unicode
+    binary_type = str
+    environb = os.environ

send2trash/plat_other.py

@@ -27,9 +27,7 @@ except ImportError:
     # Python 2
     from urllib import quote
 
-# PY2-PY3 compatibilty
-text_type = str if sys.version_info[0] == 3 else unicode
-environb = os.environb if sys.version_info[0] >= 3 else os.environ
+from .compat import text_type, environb
 
 try:
     fsencode = os.fsencode   # Python 3

tests/test_plat_other.py

@@ -5,6 +5,7 @@ import os
 from os import path as op
 import send2trash.plat_other
 from send2trash.plat_other import send2trash as s2t
+from send2trash.compat import PY3
 from configparser import ConfigParser
 from tempfile import mkdtemp, NamedTemporaryFile, mktemp
 import shutil
@@ -13,7 +14,6 @@ import sys
 # Could still use cleaning up. But no longer relies on ramfs.
 
 HOMETRASH = send2trash.plat_other.HOMETRASH
-PY3 = sys.version_info[0] >= 3
 
 def touch(path):
   with open(path, 'a'):