Add current Python version in setup.py error message.

QuLogic · QuLogic · commit dabc706c44ef · 2020-04-08T17:12:25.000-04:00
diff --git a/setup.py b/setup.py
@@ -13,11 +13,13 @@
 if sys.version_info < min_version:
     error = """
 Beginning with Matplotlib 3.1, Python {0} or above is required.
+You are using Python {1}.
 
 This may be due to an out of date pip.
 
 Make sure you have pip >= 9.0.1.
-""".format('.'.join(str(n) for n in min_version))
+""".format('.'.join(str(n) for n in min_version),
+           '.'.join(str(n) for n in sys.version_info[:3]))
     sys.exit(error)
 
 from pathlib import Path
