Merge pull request #5227 from taosdata/feature/sangshuduo/TD-2971-python-connector-support-unsigned

Feature/sangshuduo/td 2971 python connector support unsigned

src/connector/python/linux/python2/taos/cinterface.py

@@ -67,13 +67,13 @@ def _crow_tinyint_unsigned_to_python(
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
 
 
@@ -102,13 +102,13 @@ def _crow_smallint_unsigned_to_python(
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
 
 
@@ -130,13 +130,13 @@ def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
 
 
@@ -162,13 +162,13 @@ def _crow_bigint_unsigned_to_python(
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
 
 

src/connector/python/linux/python2/taos/constants.py

@@ -19,10 +19,10 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
-    C_TINYINT_UNSIGNED = 12
-    C_SMALLINT_UNSIGNED = 13
-    C_INT_UNSIGNED = 14
-    C_BIGINT_UNSIGNED = 15
+    C_TINYINT_UNSIGNED = 11
+    C_SMALLINT_UNSIGNED = 12
+    C_INT_UNSIGNED = 13
+    C_BIGINT_UNSIGNED = 14
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02

src/connector/python/linux/python3/taos/cinterface.py

@@ -67,13 +67,13 @@ def _crow_tinyint_unsigned_to_python(
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
 
 
@@ -102,13 +102,13 @@ def _crow_smallint_unsigned_to_python(
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
 
 
@@ -130,13 +130,13 @@ def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
 
 
@@ -162,13 +162,13 @@ def _crow_bigint_unsigned_to_python(
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
 
 

src/connector/python/linux/python3/taos/constants.py

@@ -19,10 +19,10 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
-    C_TINYINT_UNSIGNED = 12
-    C_SMALLINT_UNSIGNED = 13
-    C_INT_UNSIGNED = 14
-    C_BIGINT_UNSIGNED = 15
+    C_TINYINT_UNSIGNED = 11
+    C_SMALLINT_UNSIGNED = 12
+    C_INT_UNSIGNED = 13
+    C_BIGINT_UNSIGNED = 14
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02

src/connector/python/osx/python3/taos/cinterface.py

@@ -67,13 +67,13 @@ def _crow_tinyint_unsigned_to_python(
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_byte))[
+                    ctypes.c_ubyte))[
                 :abs(num_of_rows)]]
 
 
@@ -102,13 +102,13 @@ def _crow_smallint_unsigned_to_python(
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_short))[
+                    ctypes.c_ushort))[
                 :abs(num_of_rows)]]
 
 
@@ -130,13 +130,13 @@ def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_int))[
+                    ctypes.c_uint))[
                 :abs(num_of_rows)]]
 
 
@@ -162,13 +162,13 @@ def _crow_bigint_unsigned_to_python(
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
     else:
         return [
             None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
                 data, ctypes.POINTER(
-                    ctypes.c_long))[
+                    ctypes.c_ulong))[
                 :abs(num_of_rows)]]
 
 

src/connector/python/osx/python3/taos/constants.py

@@ -19,10 +19,10 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
-    C_TINYINT_UNSIGNED = 12
-    C_SMALLINT_UNSIGNED = 13
-    C_INT_UNSIGNED = 14
-    C_BIGINT_UNSIGNED = 15
+    C_TINYINT_UNSIGNED = 11
+    C_SMALLINT_UNSIGNED = 12
+    C_INT_UNSIGNED = 13
+    C_BIGINT_UNSIGNED = 14
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02

src/connector/python/windows/python2/taos/__init__.py

@@ -8,6 +8,7 @@ paramstyle = 'pyformat'
 
 __all__ = ['connection', 'cursor']
 
+
 def connect(*args, **kwargs):
     """ Function to return a TDengine connector object
 

src/connector/python/windows/python2/taos/connection.py

@@ -2,9 +2,11 @@ from .cursor import TDengineCursor
 from .subscription import TDengineSubscription
 from .cinterface import CTaosInterface
 
+
 class TDengineConnection(object):
     """ TDengine connection object
     """
+
     def __init__(self, *args, **kwargs):
         self._conn = None
         self._host = None
@@ -30,7 +32,7 @@ class TDengineConnection(object):
         # password
         if 'password' in kwargs:
             self._password = kwargs['password']
-        
+
         # database
         if 'database' in kwargs:
             self._database = kwargs['database']
@@ -44,7 +46,12 @@ class TDengineConnection(object):
             self._config = kwargs['config']
 
         self._chandle = CTaosInterface(self._config)
-        self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
+        self._conn = self._chandle.connect(
+            self._host,
+            self._user,
+            self._password,
+            self._database,
+            self._port)
 
     def close(self):
         """Close current connection.
@@ -56,7 +63,8 @@ class TDengineConnection(object):
         """
         if self._conn is None:
             return None
-        sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
+        sub = CTaosInterface.subscribe(
+            self._conn, restart, topic, sql, interval)
         return TDengineSubscription(sub)
 
     def cursor(self):
@@ -81,7 +89,8 @@ class TDengineConnection(object):
         """
         pass
 
+
 if __name__ == "__main__":
     conn = TDengineConnection(host='192.168.1.107')
     conn.close()
-    print("Hello world")
\ No newline at end of file
+    print("Hello world")

src/connector/python/windows/python2/taos/constants.py

@@ -3,6 +3,7 @@
 
 from .dbapi import *
 
+
 class FieldType(object):
     """TDengine Field Types
     """
@@ -18,13 +19,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 11
+    C_SMALLINT_UNSIGNED = 12
+    C_INT_UNSIGNED = 13
+    C_BIGINT_UNSIGNED = 14
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])

src/connector/python/windows/python2/taos/cursor.py

@@ -5,6 +5,7 @@ import threading
 
 # querySeqNum = 0
 
+
 class TDengineCursor(object):
     """Database cursor which is used to manage the context of a fetch operation.
 
@@ -23,7 +24,7 @@ class TDengineCursor(object):
             if the cursor has not had an operation invoked via the .execute*() method yet.
 
         .rowcount:This read-only attribute specifies the number of rows that the last
-            .execute*() produced (for DQL statements like SELECT) or affected 
+            .execute*() produced (for DQL statements like SELECT) or affected
     """
 
     def __init__(self, connection=None):
@@ -50,13 +51,14 @@ class TDengineCursor(object):
             raise OperationalError("Invalid use of fetch iterator")
 
         if self._block_rows <= self._block_iter:
-            block, self._block_rows = CTaosInterface.fetchRow(self._result, self._fields)
+            block, self._block_rows = CTaosInterface.fetchRow(
+                self._result, self._fields)
             if self._block_rows == 0:
                 raise StopIteration
             self._block = list(map(tuple, zip(*block)))
             self._block_iter = 0
 
-        data =  self._block[self._block_iter]
+        data = self._block[self._block_iter]
         self._block_iter += 1
 
         return data
@@ -91,7 +93,7 @@ class TDengineCursor(object):
         """
         if self._connection is None:
             return False
-        
+
         self._reset_result()
         self._connection = None
 
@@ -106,19 +108,20 @@ class TDengineCursor(object):
         if not self._connection:
             # TODO : change the exception raised here
             raise ProgrammingError("Cursor is not connected")
-        
+
         self._reset_result()
 
         stmt = operation
         if params is not None:
             pass
-        
+
         self._result = CTaosInterface.query(self._connection._conn, stmt)
         errno = CTaosInterface.libtaos.taos_errno(self._result)
         if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
-                self._affected_rows += CTaosInterface.affectedRows(self._result)
-                return CTaosInterface.affectedRows(self._result )
+                self._affected_rows += CTaosInterface.affectedRows(
+                    self._result)
+                return CTaosInterface.affectedRows(self._result)
             else:
                 self._fields = CTaosInterface.useResult(self._result)
                 return self._handle_result()
@@ -147,17 +150,20 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchRow(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
         return list(map(tuple, zip(*buffer)))
-        
+
     def fetchall(self):
         if self._result is None or self._fields is None:
             raise OperationalError("Invalid use of fetchall")
@@ -165,20 +171,21 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchBlock(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
-            if num_of_fields == 0: break
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
+            if num_of_fields == 0:
+                break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
 
-        
         return list(map(tuple, zip(*buffer)))
 
-
-
     def nextset(self):
         """
         """
@@ -209,6 +216,7 @@ class TDengineCursor(object):
         """
         self._description = []
         for ele in self._fields:
-            self._description.append((ele['name'], ele['type'], None, None, None, None, False))
-        
+            self._description.append(
+                (ele['name'], ele['type'], None, None, None, None, False))
+
         return self._result

src/connector/python/windows/python2/taos/dbapi.py

@@ -4,6 +4,7 @@
 import time
 import datetime
 
+
 class DBAPITypeObject(object):
     def __init__(self, *values):
         self.values = values
@@ -16,23 +17,28 @@ class DBAPITypeObject(object):
         else:
             return -1
 
+
 Date = datetime.date
 Time = datetime.time
 Timestamp = datetime.datetime
 
+
 def DataFromTicks(ticks):
     return Date(*time.localtime(ticks)[:3])
 
+
 def TimeFromTicks(ticks):
     return Time(*time.localtime(ticks)[3:6])
 
+
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
+
 Binary = bytes
 
 # STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
 # BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
 # NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
 # DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
-# ROWID = DBAPITypeObject()
\ No newline at end of file
+# ROWID = DBAPITypeObject()

src/connector/python/windows/python2/taos/error.py

 """Python exceptions
 """
 
+
 class Error(Exception):
     def __init__(self, msg=None, errno=None):
         self.msg = msg
         self._full_msg = self.msg
         self.errno = errno
-    
+
     def __str__(self):
         return self._full_msg
 
+
 class Warning(Exception):
     """Exception raised for important warnings like data truncations while inserting.
     """
     pass
 
+
 class InterfaceError(Error):
-    """Exception raised for errors that are related to the database interface rather than the database itself. 
+    """Exception raised for errors that are related to the database interface rather than the database itself.
     """
     pass
 
+
 class DatabaseError(Error):
-    """Exception raised for errors that are related to the database. 
+    """Exception raised for errors that are related to the database.
     """
     pass
 
+
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
     """
     pass
 
+
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
     """
@@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
     """
     pass
 
+
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal error.
     """
     pass
 
+
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors.
     """
     pass
 
+
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used which is not supported by the database,.
     """
-    pass
\ No newline at end of file
+    pass

src/connector/python/windows/python2/taos/subscription.py

 from .cinterface import CTaosInterface
 from .error import *
 
+
 class TDengineSubscription(object):
     """TDengine subscription object
     """
+
     def __init__(self, sub):
         self._sub = sub
 
-
     def consume(self):
         """Consume rows of a subscription
         """
         if self._sub is None:
             raise OperationalError("Invalid use of consume")
-        
+
         result, fields = CTaosInterface.consume(self._sub)
         buffer = [[] for i in range(len(fields))]
         while True:
             block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
-            if num_of_fields == 0: break
+            if num_of_fields == 0:
+                break
             for i in range(len(fields)):
                 buffer[i].extend(block[i])
 
         self.fields = fields
         return list(map(tuple, zip(*buffer)))
 
-
-    def close(self, keepProgress = True):
+    def close(self, keepProgress=True):
         """Close the Subscription.
         """
         if self._sub is None:
@@ -38,15 +39,19 @@ class TDengineSubscription(object):
 
 if __name__ == '__main__':
     from .connection import TDengineConnection
-    conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
+    conn = TDengineConnection(
+        host="127.0.0.1",
+        user="root",
+        password="taosdata",
+        database="test")
 
     # Generate a cursor object to run SQL commands
     sub = conn.subscribe(True, "test", "select * from meters;", 1000)
 
-    for i in range(0,10):
+    for i in range(0, 10):
         data = sub.consume()
         for d in data:
             print(d)
 
     sub.close()
-    conn.close()
\ No newline at end of file
+    conn.close()

src/connector/python/windows/python3/taos/__init__.py

@@ -8,6 +8,7 @@ paramstyle = 'pyformat'
 
 __all__ = ['connection', 'cursor']
 
+
 def connect(*args, **kwargs):
     """ Function to return a TDengine connector object
 

src/connector/python/windows/python3/taos/connection.py

@@ -2,9 +2,11 @@ from .cursor import TDengineCursor
 from .subscription import TDengineSubscription
 from .cinterface import CTaosInterface
 
+
 class TDengineConnection(object):
     """ TDengine connection object
     """
+
     def __init__(self, *args, **kwargs):
         self._conn = None
         self._host = None
@@ -30,7 +32,7 @@ class TDengineConnection(object):
         # password
         if 'password' in kwargs:
             self._password = kwargs['password']
-        
+
         # database
         if 'database' in kwargs:
             self._database = kwargs['database']
@@ -44,7 +46,12 @@ class TDengineConnection(object):
             self._config = kwargs['config']
 
         self._chandle = CTaosInterface(self._config)
-        self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
+        self._conn = self._chandle.connect(
+            self._host,
+            self._user,
+            self._password,
+            self._database,
+            self._port)
 
     def close(self):
         """Close current connection.
@@ -56,7 +63,8 @@ class TDengineConnection(object):
         """
         if self._conn is None:
             return None
-        sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
+        sub = CTaosInterface.subscribe(
+            self._conn, restart, topic, sql, interval)
         return TDengineSubscription(sub)
 
     def cursor(self):
@@ -81,7 +89,8 @@ class TDengineConnection(object):
         """
         pass
 
+
 if __name__ == "__main__":
     conn = TDengineConnection(host='192.168.1.107')
     conn.close()
-    print("Hello world")
\ No newline at end of file
+    print("Hello world")

src/connector/python/windows/python3/taos/constants.py

@@ -3,6 +3,7 @@
 
 from .dbapi import *
 
+
 class FieldType(object):
     """TDengine Field Types
     """
@@ -18,13 +19,21 @@ class FieldType(object):
     C_BINARY = 8
     C_TIMESTAMP = 9
     C_NCHAR = 10
+    C_TINYINT_UNSIGNED = 11
+    C_SMALLINT_UNSIGNED = 12
+    C_INT_UNSIGNED = 13
+    C_BIGINT_UNSIGNED = 14
     # NULL value definition
     # NOTE: These values should change according to C definition in tsdb.h
     C_BOOL_NULL = 0x02
     C_TINYINT_NULL = -128
+    C_TINYINT_UNSIGNED_NULL = 255
     C_SMALLINT_NULL = -32768
+    C_SMALLINT_UNSIGNED_NULL = 65535
     C_INT_NULL = -2147483648
+    C_INT_UNSIGNED_NULL = 4294967295
     C_BIGINT_NULL = -9223372036854775808
+    C_BIGINT_UNSIGNED_NULL = 18446744073709551615
     C_FLOAT_NULL = float('nan')
     C_DOUBLE_NULL = float('nan')
     C_BINARY_NULL = bytearray([int('0xff', 16)])

src/connector/python/windows/python3/taos/cursor.py

@@ -24,7 +24,7 @@ class TDengineCursor(object):
             if the cursor has not had an operation invoked via the .execute*() method yet.
 
         .rowcount:This read-only attribute specifies the number of rows that the last
-            .execute*() produced (for DQL statements like SELECT) or affected 
+            .execute*() produced (for DQL statements like SELECT) or affected
     """
 
     def __init__(self, connection=None):
@@ -51,13 +51,14 @@ class TDengineCursor(object):
             raise OperationalError("Invalid use of fetch iterator")
 
         if self._block_rows <= self._block_iter:
-            block, self._block_rows = CTaosInterface.fetchRow(self._result, self._fields)
+            block, self._block_rows = CTaosInterface.fetchRow(
+                self._result, self._fields)
             if self._block_rows == 0:
                 raise StopIteration
             self._block = list(map(tuple, zip(*block)))
             self._block_iter = 0
 
-        data =  self._block[self._block_iter]
+        data = self._block[self._block_iter]
         self._block_iter += 1
 
         return data
@@ -92,7 +93,7 @@ class TDengineCursor(object):
         """
         if self._connection is None:
             return False
-        
+
         self._reset_result()
         self._connection = None
 
@@ -107,24 +108,25 @@ class TDengineCursor(object):
         if not self._connection:
             # TODO : change the exception raised here
             raise ProgrammingError("Cursor is not connected")
-        
+
         self._reset_result()
 
         stmt = operation
         if params is not None:
             pass
-        
+
         self._result = CTaosInterface.query(self._connection._conn, stmt)
         errno = CTaosInterface.libtaos.taos_errno(self._result)
         if errno == 0:
             if CTaosInterface.fieldsCount(self._result) == 0:
-                self._affected_rows += CTaosInterface.affectedRows(self._result )
-                return CTaosInterface.affectedRows(self._result )
+                self._affected_rows += CTaosInterface.affectedRows(
+                    self._result)
+                return CTaosInterface.affectedRows(self._result)
             else:
-                self._fields = CTaosInterface.useResult(self._result )
+                self._fields = CTaosInterface.useResult(self._result)
                 return self._handle_result()
         else:
-            raise ProgrammingError(CTaosInterface.errStr(self._result ), errno)
+            raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
 
     def executemany(self, operation, seq_of_parameters):
         """Prepare a database operation (query or command) and then execute it against all parameter sequences or mappings found in the sequence seq_of_parameters.
@@ -148,10 +150,13 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchRow(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
             if num_of_fields == 0:
                 break
             self._rowcount += num_of_fields
@@ -166,20 +171,21 @@ class TDengineCursor(object):
         buffer = [[] for i in range(len(self._fields))]
         self._rowcount = 0
         while True:
-            block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
+            block, num_of_fields = CTaosInterface.fetchBlock(
+                self._result, self._fields)
             errno = CTaosInterface.libtaos.taos_errno(self._result)
             if errno != 0:
-                raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
-            if num_of_fields == 0: break
+                raise ProgrammingError(
+                    CTaosInterface.errStr(
+                        self._result), errno)
+            if num_of_fields == 0:
+                break
             self._rowcount += num_of_fields
             for i in range(len(self._fields)):
                 buffer[i].extend(block[i])
 
-        
         return list(map(tuple, zip(*buffer)))
 
-
-
     def nextset(self):
         """
         """
@@ -204,12 +210,13 @@ class TDengineCursor(object):
         self._block_rows = -1
         self._block_iter = 0
         self._affected_rows = 0
-    
+
     def _handle_result(self):
         """Handle the return result from query.
         """
         self._description = []
         for ele in self._fields:
-            self._description.append((ele['name'], ele['type'], None, None, None, None, False))
-        
+            self._description.append(
+                (ele['name'], ele['type'], None, None, None, None, False))
+
         return self._result

src/connector/python/windows/python3/taos/dbapi.py

@@ -4,6 +4,7 @@
 import time
 import datetime
 
+
 class DBAPITypeObject(object):
     def __init__(self, *values):
         self.values = values
@@ -16,23 +17,28 @@ class DBAPITypeObject(object):
         else:
             return -1
 
+
 Date = datetime.date
 Time = datetime.time
 Timestamp = datetime.datetime
 
+
 def DataFromTicks(ticks):
     return Date(*time.localtime(ticks)[:3])
 
+
 def TimeFromTicks(ticks):
     return Time(*time.localtime(ticks)[3:6])
 
+
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
+
 Binary = bytes
 
 # STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
 # BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
 # NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
 # DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
-# ROWID = DBAPITypeObject()
\ No newline at end of file
+# ROWID = DBAPITypeObject()

src/connector/python/windows/python3/taos/error.py

 """Python exceptions
 """
 
+
 class Error(Exception):
     def __init__(self, msg=None, errno=None):
         self.msg = msg
         self._full_msg = self.msg
         self.errno = errno
-    
+
     def __str__(self):
         return self._full_msg
 
+
 class Warning(Exception):
     """Exception raised for important warnings like data truncations while inserting.
     """
     pass
 
+
 class InterfaceError(Error):
-    """Exception raised for errors that are related to the database interface rather than the database itself. 
+    """Exception raised for errors that are related to the database interface rather than the database itself.
     """
     pass
 
+
 class DatabaseError(Error):
-    """Exception raised for errors that are related to the database. 
+    """Exception raised for errors that are related to the database.
     """
     pass
 
+
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
     """
     pass
 
+
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
     """
@@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
     """
     pass
 
+
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal error.
     """
     pass
 
+
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors.
     """
     pass
 
+
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used which is not supported by the database,.
     """
-    pass
\ No newline at end of file
+    pass

src/connector/python/windows/python3/taos/subscription.py

 from .cinterface import CTaosInterface
 from .error import *
 
+
 class TDengineSubscription(object):
     """TDengine subscription object
     """
+
     def __init__(self, sub):
         self._sub = sub
 
-
     def consume(self):
         """Consume rows of a subscription
         """
         if self._sub is None:
             raise OperationalError("Invalid use of consume")
-        
+
         result, fields = CTaosInterface.consume(self._sub)
         buffer = [[] for i in range(len(fields))]
         while True:
             block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
-            if num_of_fields == 0: break
+            if num_of_fields == 0:
+                break
             for i in range(len(fields)):
                 buffer[i].extend(block[i])
 
         self.fields = fields
         return list(map(tuple, zip(*buffer)))
 
-
-    def close(self, keepProgress = True):
+    def close(self, keepProgress=True):
         """Close the Subscription.
         """
         if self._sub is None:
@@ -38,15 +39,19 @@ class TDengineSubscription(object):
 
 if __name__ == '__main__':
     from .connection import TDengineConnection
-    conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
+    conn = TDengineConnection(
+        host="127.0.0.1",
+        user="root",
+        password="taosdata",
+        database="test")
 
     # Generate a cursor object to run SQL commands
     sub = conn.subscribe(True, "test", "select * from meters;", 1000)
 
-    for i in range(0,10):
+    for i in range(0, 10):
         data = sub.consume()
         for d in data:
             print(d)
 
     sub.close()
-    conn.close()
\ No newline at end of file
+    conn.close()

tests/pytest/insert/basic_unsigned.py

@@ -26,7 +26,7 @@ class TDTestCase:
         tdSql.prepare()
 
         ret = tdSql.execute(
-            'create table tb (ts timestamp, speed int unsigned)')
+            'create table tb (ts timestamp, speed tinyint unsigned)')
 
         insertRows = 10
         tdLog.info("insert %d rows" % (insertRows))
@@ -38,11 +38,11 @@ class TDTestCase:
         tdLog.info("insert earlier data")
         tdSql.execute('insert into tb values (now - 5m , 10)')
         tdSql.execute('insert into tb values (now - 6m , 10)')
-        tdSql.execute('insert into tb values (now - 7m , 10)')
-        tdSql.execute('insert into tb values (now - 8m , 4294967294)')
+        tdSql.execute('insert into tb values (now - 7m , NULL)')
+        tdSql.execute('insert into tb values (now - 8m , 254)')
 
         tdSql.error('insert into tb values (now - 9m, -1)')
-        tdSql.error('insert into tb values (now - 9m, 4294967295)')
+        tdSql.error('insert into tb values (now - 9m, 255)')
 
         tdSql.query("select * from tb")
         tdSql.checkRows(insertRows + 4)