一般我们采取分块处理，一次处理固定大小的块。

 

1 def read_in_chunks(file_obj,chunk_size): 2 """Lazy function (generator) to read a file piece by piece""" 3 　　while True: 4 　　　　data = file_obj.read(chunk_size) 5 　　　　if data == "": 6 　　　　　　break 7 　　　　yield data 8  9 10 11 file = open(file_path,"rb")12 13 for piece in read_in_chunks(file,chunk_size):14 　　process_data(piece)