On 10-03-2015 04:14, Cameron Simpson wrote: > On 10Mar2015 04:01, Paulo da Silva <p_s_d_a_s_i_l_v_a...@netcabo.pt> wrote: >> On 10-03-2015 00:55, Dave Angel wrote: ... >> For .pnm photo files I read the entire file (I needed it in memory >> anyway), splited a copy separated by b'\n', got the headers stuff and >> then used the original remaining bytes as the photo pixels. >> But this is very tricky! I am on linux, but if I ran this program on >> windows I needed to change it to "eat" also the '\r'. > > If you're in Python 3 (recommended!) and you're parsing the headers as > text, you should be converting your split binary into strings anyway. So > you can just use .strip() or rstrip(); either will remove trailing '\r' > and '\n', so it will work in both UNIX and Windows. > I didn't know strip removes \r.
>> In the .pnm case the headers don't have special chars. They fit into >> ascii. But in a file who have them it would be also difficult to compute >> the consumed length. > > I presume you're gathering the headers in "binary" mode and decoding > each to a string. So you know the consumed length from the binary half; > that they're different lengths after decoding to strings is then > irrelevant. You are right. I am still a little confused about python3. Thanks a lot -- https://mail.python.org/mailman/listinfo/python-list
