0.2.18, changed sys.version compararion

Author: superisaac

setup.py

@@ -2,7 +2,7 @@
 from setuptools import find_packages
 
 setup(name='sqlmat',
-      version='0.2.17',
+      version='0.2.18',
       description='simply map python3 statement to postgresql statement',
       author='Zeng Ke',
       author_email='superisaac.ke@gmail.com',

sqlmat/db.py

@@ -102,7 +102,7 @@ def get_frame(self, pool: Pool) -> 'TxFrame':
         return self.entries[pool]
 
 def contextvar_available() -> bool:
-    return sys.version >= '3.7'
+    return (sys.version_info.major, sys.version_info.minor) >= (3, 7)
 
 if contextvar_available():
     from contextvars import ContextVar