How to use _set_signature method in autotest

Best Python code snippet using autotest_python Github


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...105 def _set_id(self, id):106 if self._id is not None and self._id != id:107 self._connection._client.close_statement(self._connection._id, self._id)108 self._id = id109 def _set_signature(self, signature):110 self._signature = signature111 self._column_data_types = []112 self._parameter_data_types = []113 if signature is None:114 return115 for column in signature.columns:116 dtype = TypeHelper.from_class(column.column_class_name)117 self._column_data_types.append(dtype)118 for parameter in signature.parameters:119 dtype = TypeHelper.from_class(parameter.class_name)120 self._parameter_data_types.append(dtype)121 def _set_frame(self, frame):122 self._frame = frame123 self._pos = None124 if frame is not None:125 if frame.rows:126 self._pos = 0127 elif not frame.done:128 raise InternalError('got an empty frame, but the statement is not done yet')129 def _fetch_next_frame(self):130 offset = self._frame.offset + len(self._frame.rows)131 frame = self._connection._client.fetch(132 self._connection._id, self._id,133 offset=offset, frame_max_size=self.itersize)134 self._set_frame(frame)135 def _process_results(self, results):136 if results:137 result = results[0]138 if result.own_statement:139 self._set_id(result.statement_id)140 self._set_signature(result.signature if result.HasField('signature') else None)141 self._set_frame(result.first_frame if result.HasField('first_frame') else None)142 self._updatecount = result.update_count143 def _transform_parameters(self, parameters):144 typed_parameters = []145 for value, data_type in zip(parameters, self._parameter_data_types):146 field_name, rep, mutate_to, cast_from = data_type147 typed_value = common_pb2.TypedValue()148 if value is None:149 typed_value.null = True150 typed_value.type = common_pb2.NULL151 else:152 typed_value.null = False153 # use the mutator function154 if mutate_to is not None:155 value = mutate_to(value)156 typed_value.type = rep157 setattr(typed_value, field_name, value)158 typed_parameters.append(typed_value)159 return typed_parameters160 def execute(self, operation, parameters=None):161 if self._closed:162 raise ProgrammingError('the cursor is already closed')163 self._updatecount = -1164 self._set_frame(None)165 if parameters is None:166 if self._id is None:167 self._set_id(self._connection._client.create_statement(self._connection._id))168 results = self._connection._client.prepare_and_execute(169 self._connection._id, self._id,170 operation, first_frame_max_size=self.itersize)171 self._process_results(results)172 else:173 statement = self._connection._client.prepare(174 self._connection._id, operation)175 self._set_id( self._set_signature(statement.signature)177 results = self._connection._client.execute(178 self._connection._id, self._id,179 statement.signature, self._transform_parameters(parameters),180 first_frame_max_size=self.itersize)181 self._process_results(results)182 def executemany(self, operation, seq_of_parameters):183 if self._closed:184 raise ProgrammingError('the cursor is already closed')185 self._updatecount = -1186 self._set_frame(None)187 statement = self._connection._client.prepare(188 self._connection._id, operation, max_rows_total=0)189 self._set_id( self._set_signature(statement.signature)191 for parameters in seq_of_parameters:192 self._connection._client.execute(193 self._connection._id, self._id,194 statement.signature, self._transform_parameters(parameters),195 first_frame_max_size=0)196 def _transform_row(self, row):197 """Transforms a Row into Python values.198 :param row:199 A ``common_pb2.Row`` object.200 :returns:201 A list of values casted into the correct Python types.202 :raises:203 NotImplementedError204 """...

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