review fixes:

* change 'code' attr to 'snippet_code';
* change 'Executed code' header;
* code changed to for-enumerate/oneline-if idioms;
* add python stacktrace printing tests;

pythonx/UltiSnips/snippet_manager.py

@@ -68,21 +68,17 @@ Following is the full stack trace:
 """
 
             msg += traceback.format_exc()
-            if hasattr(e, 'code'):
+            if hasattr(e, 'snippet_code'):
                 _, _, tb = sys.exc_info()
                 tb_top = traceback.extract_tb(tb)[-1]
-                msg += "\nFollowing is the full executed code:\n"
-                lines = e.code.split("\n")
-                number = 1
-                for line in lines:
+                msg += "\nExecuted snippet code:\n"
+                lines = e.snippet_code.split("\n")
+                for number, line in enumerate(lines, 1):
                     msg += str(number).rjust(3)
-                    prefix = ""
-                    if line != "":
-                        prefix = "   "
+                    prefix = "   " if line else ""
                     if tb_top[1] == number:
                         prefix = " > "
                     msg += prefix + line + "\n"
-                    number += 1
 
             # Vim sends no WinLeave msg here.
             self._leaving_buffer()  # pylint:disable=protected-access

pythonx/UltiSnips/text_objects/_python_code.py

@@ -266,12 +266,11 @@ class PythonCode(NoneditableTextObject):
         })
         self._snip._reset(ct)  # pylint:disable=protected-access
 
-
         for code in self._codes:
             try:
                 exec(code, self._locals)  # pylint:disable=exec-used
             except Exception as e:
-                e.code = code
+                e.snippet_code = code
                 raise
 
         rv = as_unicode(

test/test_ParseSnippets.py

@@ -239,3 +239,27 @@ endsnippet
         """}
     keys = 'ab' + EX
     wanted = 'x first a bob b y'
+
+
+class ParseSnippets_PrintPythonStacktrace(_VimTest):
+    files = { 'us/all.snippets': r"""
+        snippet test
+        `!p abc()`
+        endsnippet
+        """}
+    keys = 'test' + EX
+    wanted = keys
+    expected_error = " > abc"
+
+
+class ParseSnippets_PrintPythonStacktraceMultiline(_VimTest):
+    files = { 'us/all.snippets': r"""
+        snippet test
+        `!p if True:
+            qwe()`
+        endsnippet
+        """}
+    keys = 'test' + EX
+    wanted = keys
+    expected_error = " > \s+qwe"
+