diff --git a/tools/CrossStackProfiler/DCGMFileReader.py b/tools/CrossStackProfiler/DCGMFileReader.py
index 4ae15df5ad03b19f8202f3cf1ee37a241b598f5e..94daeb607fee416d4692302041d8d8c134635634 100755
--- a/tools/CrossStackProfiler/DCGMFileReader.py
+++ b/tools/CrossStackProfiler/DCGMFileReader.py
@@ -100,7 +100,7 @@ class dcgmFileReader(FileReader):
                                       axis=0,
                                       join='outer')
         dcgm_data = dcgm_data.dropna()
-        if not q is None:
+        if q is not None:
             q.put(dcgm_data)
         self._logger.info("I finish processing %s!" % fileName)
         return dcgm_data
diff --git a/tools/CrossStackProfiler/NetFileReader.py b/tools/CrossStackProfiler/NetFileReader.py
index 1ae8a6803d540c6b1ea83bdaae61a378299d10c6..52d4064649134f02e7fb57bc4144f0ae02bc782d 100755
--- a/tools/CrossStackProfiler/NetFileReader.py
+++ b/tools/CrossStackProfiler/NetFileReader.py
@@ -73,7 +73,7 @@ class netFileReader(FileReader):
                             (line[:-1], fileName))
         traceInfo["traceEvents"] = traceEventList
 
-        if not q is None:
+        if q is not None:
             q.put(traceInfo)
         else:
             return traceInfo
diff --git a/tools/CrossStackProfiler/ProfileFileReader.py b/tools/CrossStackProfiler/ProfileFileReader.py
index 6fb7d87fd47542920d0e166fb732fce9892a2e4e..955b2248a089080ba6f99342e5b7125e31716e7e 100755
--- a/tools/CrossStackProfiler/ProfileFileReader.py
+++ b/tools/CrossStackProfiler/ProfileFileReader.py
@@ -53,7 +53,7 @@ class profileFileReader(FileReader):
                          (rankId)] = self._parseSingleFile(fileName)
             self._logger.info("I finish processing %s!" % fileName)
 
-        if not q is None:
+        if q is not None:
             q.put(profile_dict)
 
         return profile_dict
@@ -142,7 +142,7 @@ class profileFileReader(FileReader):
 
             res[str(rankId)] = pipeLineList
 
-        if not q is None:
+        if q is not None:
             q.put(res)
 
         return res