Chris Angelico於 2018年3月20日星期二 UTC+8上午8時06分05秒寫道: > On Tue, Mar 20, 2018 at 10:46 AM, <jf...@ms4.hinet.net> wrote: > > D:\Temp>py > > Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32 > > bit (Intel)] on win32 > > Type "help", "copyright", "credits" or "license" for more information. > >>>> '{:02X}'.format(256) > > '100' > >>>> > > What I expected is '00'. Am I wrong? > > > > Python avoids losing data. If you really want to enforce that this is > two characters long, you can either restrict the data first (maybe > with "% 256"), or trim the resulting string: > > >>> '{:02X}'.format(256)[-2:] > '00' > > ChrisA
I had overlooked the document there it says "width ... defining the minimum field width...'. I was wrong, it's not a demand. Thank you, ChrisA. --Jach -- https://mail.python.org/mailman/listinfo/python-list