Delay import of shlex to reduce startup time.

1 files changed, 4 insertions, 1 deletions

diff --git a/numpy/testing/numpytest.py b/numpy/testing/numpytest.py
index e1c3b5c0d..06229630a 100644
--- a/numpy/testing/numpytest.py
+++ b/numpy/testing/numpytest.py
@@ -3,7 +3,6 @@ import re
 import sys
 import imp
 import types
-import shlex
 import unittest
 import traceback
 import warnings
@@ -624,6 +623,10 @@ class NumpyTest:
         """ Run Numpy module test suite with level and verbosity
         taken from sys.argv. Requires optparse module.
         """
+        
+        # delayed import of shlex to reduce startup time
+        import shlex
+
         try:
             from optparse import OptionParser
         except ImportError: