Implement proper editor integration for mypy

mypy-editor-integration

@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+
+import subprocess
+import sys
+
+files = [x for x in sys.argv[1:] if not x.startswith('-')]
+if not files:
+    raise SystemExit(subprocess.Popen(['mypy'] + sys.argv[1:]).wait())
+
+output = subprocess.run('dmypy run -- --follow-imports=error --show-column-numbers --no-color-output'.split(), stdout=subprocess.PIPE).stdout
+q = files[0] + ':'
+for line in output.decode('utf-8').splitlines():
+    if line.startswith(q):
+        print(line)