Make the field character limit for __str__ a global constant

2 files changed, 7 insertions, 1 deletions

diff --git a/astroid/__init__.py b/astroid/__init__.py
index 7d84335e..6b2b0049 100644
--- a/astroid/__init__.py
+++ b/astroid/__init__.py
@@ -83,8 +83,10 @@ from astroid.builder import parse
 from astroid.util import Uninferable, YES
 
 # TODO
+# from astroid.tree import zipper
 from astroid.tree.base import NodeNG
 
+
 # transform utilities (filters and decorator)
 
 class AsStringRegexpPredicate(object):
diff --git a/astroid/tree/base.py b/astroid/tree/base.py
index 098ca194..59fc2872 100644
--- a/astroid/tree/base.py
+++ b/astroid/tree/base.py
@@ -34,6 +34,10 @@ from astroid import util
 inference = util.lazy_import('inference')
 
 
+# The maximum number of characters to print for a field in a string
+# representation of a node.
+FIELD_CHARACTERS_LIMIT = 160
+
 @util.register_implementation(treeabc.NodeNG)
 class NodeNG(object):
     """Base Class for all Astroid node classes.
@@ -129,7 +133,7 @@ class NodeNG(object):
 
             # Some fields, notably source_code for Module nodes, are
             # too long to display comfortably, so this limits them.
-            if len(lines[0]) > 160:
+            if len(lines[0]) > FIELD_CHARACTERS_LIMIT:
                 lines[0] = lines[0][:160] + '...'
             inner = [lines[0]]
             for line in lines[1:]: