Import six (census-instrumentation#1223)

lzchen · web-flow · commit 927b75048424 · 2023-09-18T12:14:35.000-07:00
diff --git a/setup.py b/setup.py
@@ -45,6 +45,7 @@
         'opencensus-context >= 0.2.dev0',
         'google-api-core >= 1.0.0, < 2.0.0; python_version<"3.6"',
         'google-api-core >= 1.0.0, < 3.0.0; python_version>="3.6"',
+        "six ~= 1.16",
     ],
     extras_require={},
     license='Apache-2.0',
