diff --git a/src/connector/python/linux/python2/taos/__init__.py b/src/connector/python/linux/python2/taos/__init__.py
index 4894488bc8d4e594c11a8be61fbea278ca2588fa..5d21671eed3aa9b2a2d33b51325388e4fa71daf8 100644
--- a/src/connector/python/linux/python2/taos/__init__.py
+++ b/src/connector/python/linux/python2/taos/__init__.py
@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.2'
 threadsafety = 0
 paramstyle = 'pyformat'
 
diff --git a/src/connector/python/linux/python2/taos/cinterface.py b/src/connector/python/linux/python2/taos/cinterface.py
index 6f0435722ffba7a3cf6e2fb22591b1d037397156..2b1b29ee31af56499d626fc56d4950e2e25f9978 100644
--- a/src/connector/python/linux/python2/taos/cinterface.py
+++ b/src/connector/python/linux/python2/taos/cinterface.py
@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
diff --git a/src/connector/python/linux/python3/taos/__init__.py b/src/connector/python/linux/python3/taos/__init__.py
index 4894488bc8d4e594c11a8be61fbea278ca2588fa..c46131eeaf74c8b1cc38b11ad3ebd8ff0bcc45d4 100644
--- a/src/connector/python/linux/python3/taos/__init__.py
+++ b/src/connector/python/linux/python3/taos/__init__.py
@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.2'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +21,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
\ No newline at end of file
+    return TDengineConnection(*args, **kwargs)
diff --git a/src/connector/python/linux/python3/taos/cinterface.py b/src/connector/python/linux/python3/taos/cinterface.py
index bbf5a0c7146f1fbc22befe50691df460ca8191c2..fdebe349fe9597260f231adb52022a2ecc9e1063 100644
--- a/src/connector/python/linux/python3/taos/cinterface.py
+++ b/src/connector/python/linux/python3/taos/cinterface.py
@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
diff --git a/src/connector/python/windows/python2/taos/__init__.py b/src/connector/python/windows/python2/taos/__init__.py
index 4894488bc8d4e594c11a8be61fbea278ca2588fa..5d21671eed3aa9b2a2d33b51325388e4fa71daf8 100644
--- a/src/connector/python/windows/python2/taos/__init__.py
+++ b/src/connector/python/windows/python2/taos/__init__.py
@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.2'
 threadsafety = 0
 paramstyle = 'pyformat'
 
diff --git a/src/connector/python/windows/python2/taos/cinterface.py b/src/connector/python/windows/python2/taos/cinterface.py
index d4bf1a0350680c407dd6b957ea3f59c0c3c9612f..14f4f49be8ae719da16dbed7e79631db7ef9689e 100644
--- a/src/connector/python/windows/python2/taos/cinterface.py
+++ b/src/connector/python/windows/python2/taos/cinterface.py
@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):
diff --git a/src/connector/python/windows/python3/taos/__init__.py b/src/connector/python/windows/python3/taos/__init__.py
index 2fec471a1adb29f08cd0d6539e8f9682bf6bc768..0708b9544f287e59e864f06d379379ee1088fcdb 100644
--- a/src/connector/python/windows/python3/taos/__init__.py
+++ b/src/connector/python/windows/python3/taos/__init__.py
@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.2'
 threadsafety = 0
 paramstyle = 'pyformat'
 
diff --git a/src/connector/python/windows/python3/taos/cinterface.py b/src/connector/python/windows/python3/taos/cinterface.py
index fb1b65fc15f2f1c0f07745bb2aecf7b928a7c555..42b820ca80feda4a269e5e80f288bd1f5e87adcd 100644
--- a/src/connector/python/windows/python3/taos/cinterface.py
+++ b/src/connector/python/windows/python3/taos/cinterface.py
@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -108,6 +109,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):