Merge "strutils: Defer import of pyparsing"5.0.0

1 files changed, 7 insertions, 4 deletions

diff --git a/oslo_utils/strutils.py b/oslo_utils/strutils.py
index 5d551f8..2bd89ee 100644
--- a/oslo_utils/strutils.py
+++ b/oslo_utils/strutils.py
@@ -23,8 +23,6 @@ import re
 import unicodedata
 import urllib
 
-import pyparsing as pp
-
 from oslo_utils._i18n import _
 from oslo_utils import encodeutils
 
@@ -575,8 +573,13 @@ def split_by_commas(value):
 
     .. versionadded:: 3.17
     """
-    word = (pp.QuotedString(quoteChar='"', escChar='\\') |
-            pp.Word(pp.printables, excludeChars='",'))
+    # pyparsing is a slow import; defer loading until we need it
+    import pyparsing as pp
+
+    word = (
+        pp.QuotedString(quoteChar='"', escChar='\\') |
+        pp.Word(pp.printables, excludeChars='",')
+    )
     grammar = pp.stringStart + pp.delimitedList(word) + pp.stringEnd
 
     try: