python 将列表写到二进制文件中

from struct import Struct def write_records(records, format, f): ''' Write a sequence of tuples to a binary file of structures. ''' record_struct = Struct(format) for r in records: f.write(record_struct.pack(*r))

Example

if name == 'main': records = [ (1, 2.3, 4.5), (6, 7.8, 9.0), (12, 13.4, 56.7) ] with open('data.b', 'wb') as f: write_records(records, '<idd', f)

读取二进制文件

from struct import Struct

def read_records(format, f): record_struct = Struct(format) chunks = iter(lambda: f.read(record_struct.size), b'') return (record_struct.unpack(chunk) for chunk in chunks)

Example

if name == 'main': with open('data.b','rb') as f: for rec in read_records('<idd', f): # Process rec ...