diff --git a/ci/other/pylintrc b/ci/other/pylintrc
index 841a3bea13fa..a1034cd50f9c 100644
--- a/ci/other/pylintrc
+++ b/ci/other/pylintrc
@@ -40,7 +40,7 @@ persistent=yes
 load-plugins=
 
 # Use multiple processes to speed up Pylint.
-jobs=8
+jobs=1
 
 # Allow loading of arbitrary C extensions. Extensions are imported into the
 # active Python interpreter and may run arbitrary code.
@@ -113,7 +113,10 @@ disable=
     too-many-instance-attributes,
     too-many-locals,
     too-many-public-methods,
-    too-many-statements
+    too-many-statements,
+    too-many-lines,
+    duplicate-code,
+    cyclic-import
 
 # disable=unicode-builtin,delslice-method,using-cmp-argument,setslice-method,dict-view-method,parameter-unpacking,range-builtin-not-iterating,print-statement,file-builtin,old-raise-syntax,basestring-builtin,execfile-builtin,indexing-exception,import-star-module-level,coerce-method,long-builtin,old-ne-operator,old-division,no-absolute-import,raw_input-builtin,old-octal-literal,oct-method,xrange-builtin,hex-method,unpacking-in-except,nonzero-method,raising-string,intern-builtin,reload-builtin,metaclass-assignment,cmp-method,filter-builtin-not-iterating,apply-builtin,map-builtin-not-iterating,next-method-called,unichr-builtin,buffer-builtin,dict-iter-method,input-builtin,coerce-builtin,getslice-method,useless-suppression,standarderror-builtin,zip-builtin-not-iterating,suppressed-message,cmp-builtin,backtick,long-suffix,reduce-builtin,round-builtin
 
diff --git a/python/mxnet/numpy_op_signature.py b/python/mxnet/numpy_op_signature.py
index 314de302109d..3e8b6d578537 100644
--- a/python/mxnet/numpy_op_signature.py
+++ b/python/mxnet/numpy_op_signature.py
@@ -19,6 +19,7 @@
 
 import sys
 import warnings
+import inspect
 from . import _numpy_op_doc
 from . import numpy as mx_np
 from . import numpy_extension as mx_npx
@@ -38,13 +39,12 @@ def _get_builtin_op(op_name):
         return None
 
     submodule_name = _get_op_submodule_name(op_name, op_name_prefix, submodule_name_list)
+    op_module = root_module
     if len(submodule_name) > 0:
         op_module = getattr(root_module, submodule_name[1:-1], None)
         if op_module is None:
             raise ValueError('Cannot find submodule {} in module {}'
                              .format(submodule_name[1:-1], root_module.__name__))
-    else:
-        op_module = root_module
 
     op = getattr(op_module, op_name[(len(op_name_prefix)+len(submodule_name)):], None)
     if op is None:
@@ -61,7 +61,6 @@ def _register_op_signatures():
                       .format(str(sys.version)))
         return
 
-    import inspect
     for op_name in dir(_numpy_op_doc):
         op = _get_builtin_op(op_name)
         if op is not None: