python分块读取大数据,避免内存不足的方法

def read_data(file_name): ''' file_name:文件地址 ''' inputfile = open(file_name, 'rb') #可打开含有中文的地址 data = pd.read_csv(inputfile, iterator=True) loop = True chunkSize = 1000 #一千行一块 chunks = [] while loop:  try:   chunk = dcs.get_chunk(chunkSize)   chunks.append(chunk)  except StopIteration:   loop = False   print("Iteration is stopped.") data = pd.concat(chunks, ignore_index=True) #print(train.head()) return data