Do not warn if OMP_NUM_THREAD set. Fixes #344.

README.rst

@@ -148,7 +148,7 @@ Usage
   array([  1.00000000e+00,   2.00000000e+00,   3.00000000e+00, ...,
            9.99998000e+05,   9.99999000e+05,   1.00000000e+06])
 
-  >>> ne.evaluate('a*b-4.1*a > 2.5*b')   # a more complex one
+  >>> ne.evaluate("a * b - 4.1 * a > 2.5 * b")   # a more complex one
   array([False, False, False, ...,  True,  True,  True], dtype=bool)
 
   >>> ne.evaluate("sin(a) + arcsinh(a/b)")   # you can also use functions

numexpr/utils.py

@@ -13,7 +13,6 @@
 
 import os
 import subprocess
-import platform
 
 from numexpr.interpreter import _set_num_threads, _get_num_threads, MAX_THREADS
 from numexpr import use_vml
@@ -134,7 +133,8 @@ def _init_num_threads():
 
     env_configured = False
     n_cores = detect_number_of_cores()
-    if 'NUMEXPR_MAX_THREADS' in os.environ and os.environ['NUMEXPR_MAX_THREADS'] != '':
+    if ('NUMEXPR_MAX_THREADS' in os.environ and os.environ['NUMEXPR_MAX_THREADS'] != '' or
+        'OMP_NUM_THREADS' in os.environ and os.environ['OMP_NUM_THREADS'] != ''):
         # The user has configured NumExpr in the expected way, so suppress logs.
         env_configured = True
         n_cores = MAX_THREADS