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相信编码问题困扰了不少coder,最近遇到的一些坑分享给大家。
1、通用方法 :decode对应的编码
>>> b"abcde" b'abcde' # utf-8 is used here because it is a very common encoding, but you # need to use the encoding your data is actually in. >>> b"abcde".decode("utf-8") 'abcde'
2、正反编码:encode完了decode
import urllib.request#urlurl="http://www.baidu.com/"#请求request = urllib.request.Request(url)#爬取结果response = urllib.request.urlopen(request) s = response.read() s=s.decode('utf-8') s=s.encode('gbk','ignore').decode('gbk'); print(s) input('...')
3、文件流的方式
针对文件的存储,如图片、音乐,需要以文件为载体作为读写
def read_file(filename): with open(filename, 'rb') as f: photo = f.read() return photo
4、Binary/LargeBinary/BLOB 字节流类读写
这个时候就要用到我们的终极武器,pickle模块。以上的方法针对特殊字符的字符串格式的读取是invalid byte。
insert = self.jobs_t.insert().values(**{ 'id': job.id, 'next_run_time': datetime_to_utc_timestamp(job.next_run_time), 'job_state': pickle.dumps(job.__getstate__(), self.pickle_protocol) # write }) res[APSchedulerJob.id] = {'next_run_time': APSchedulerJob.next_run_time, 'job_state': str(pickle.loads(APSchedulerJob.job_state)), } # read 结果: { "dbintobalant": { "job_state": "{'version': 1, 'id': 'dbintobalant', 'func': 'app.main.views:db_balant', 'trigger': <CronTrigger (day_of_week='mon-sun', hour='*', minute='*/4', second='0', timezone='Asia/Shanghai')>, 'executor': 'default', 'args': (), 'kwargs': {}, 'name': 'dbintobalant', 'misfire_grace_time': 1, 'coalesce': False, 'max_instances': 5, 'next_run_time': datetime.datetime(2018, 6, 22, 14, 8, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)}", "next_run_time": 1529647680.0 }, "hwintobalant": { "job_state": "{'version': 1, 'id': 'hwintobalant', 'func': 'app.main.views:hw_balant', 'trigger': <CronTrigger (day_of_week='mon-sun', hour='*', minute='*/3', second='0', timezone='Asia/Shanghai')>, 'executor': 'default', 'args': (), 'kwargs': {}, 'name': 'hwintobalant', 'misfire_grace_time': 1, 'coalesce': False, 'max_instances': 5, 'next_run_time': datetime.datetime(2018, 6, 22, 14, 9, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)}", "next_run_time": 1529647740.0 }, "mwintobalant": { "job_state": "{'version': 1, 'id': 'mwintobalant', 'func': 'app.main.views:mw_balant', 'trigger': <CronTrigger (day_of_week='mon-sun', hour='*', minute='*/2', second='0', timezone='Asia/Shanghai')>, 'executor': 'default', 'args': (), 'kwargs': {}, 'name': 'mwintobalant', 'misfire_grace_time': 1, 'coalesce': False, 'max_instances': 5, 'next_run_time': datetime.datetime(2018, 6, 22, 14, 8, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)}", "next_run_time": 1529647680.0 } }
如有其他好的方法,欢迎交流。
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