improving self test.

pyzmp/__main__.py

@@ -1,7 +1,16 @@
 from __future__ import absolute_import
 from __future__ import print_function
 
-import pytest
+import sys
+
+
+def main():
+    if len(sys.argv) > 1 and sys.argv[1] == '--pytest':
+        import pytest  # import only if needed
+        errno = pytest.main(sys.argv[2:])
+        sys.exit(errno)
+
 
 if __name__ == "__main__":
-    pytest.main()
+    main()
+

setup.py

@@ -16,7 +16,7 @@
     ],
     entry_points={
         'console_scripts': [
-            'pyzmp = pyzmp.__main__'
+            'pyzmp = pyzmp.__main__:main'
         ]
     },
     # this is better than using package data ( since behavior is a bit different from distutils... )

tox.ini

@@ -19,5 +19,6 @@ envlist = py27
 # to always force recreation and avoid unexpected side effects
 recreate=True
 
-# we want to make sure python finds the installed package
+# we want to make sure python finds the installed package in tox env
+# and doesn't confuse with pyc generated during dev (which happens if we use self test feature here)
 commands= py.test --pyargs pyzmp {posargs}