why the following behavior:
>>> b=b'thisisbytes'
>>> b[0] == b't'
False
>>> b[0]
116
i expected same thing as:
>>> b.startswith(b't')
True
>>> b[0:1] == b't'
True
>>> b[0:1]
b't'
>>> b[:1]
b't'
and this is a bit curious:
>>> b[2:5]
b'isi'
>>> for i in b[2:5]:
print(i)
105
115
105
problems occur when filename is in bytes.
>>> os.listdir('/usr/doc/kbd-1.08/utf')
['README', 'ethiopic', b'âªâ¬',
'utfdemo', 'utflist']
os.stat for example works:
>>> os.stat(b'/usr/doc/kbd-1.08/utf/âªâ¬')
posix.stat_result(st_mode=33188, st_ino=1376259,
st_dev=5633, st_nlink=1, st_uid=0, st_gid=0, st_size=295,
st_atime=1211305274, st_mtime=1034334536, st_ctime=1190763635)
but other functions don't. especially os.path.join and os.walk complain:
>>> w=os.walk('/usr/doc/kbd-1.08/utf/')
>>> next(w)
Traceback (most recent call last):
File "<pyshell#36>", line 1, in <module>
next(w)
File "/root/Py3kb1/lib/python3.0/os.py", line 268, in walk
if isdir(join(top, name)):
File "/root/Py3kb1/lib/python3.0/posixpath.py", line 64, in join
if b.startswith('/'):
TypeError: expected an object with the buffer interface
and trying to open the file:
>>> f=open('âªâ¬')
Traceback (most recent call last):
File "<pyshell#77>", line 1, in <module>
f=open('âªâ¬')
File "/root/Py3kb1/lib/python3.0/io.py", line 280, in __new__
return open(*args, **kwargs)
File "/root/Py3kb1/lib/python3.0/io.py", line 219, in open
closefd)
UnicodeEncodeError: 'ascii' codec can't encode characters in
position 0-5: ordinal not in range(128)
>>> f=open(b'âªâ¬')
Traceback (most recent call last):
File "<pyshell#78>", line 1, in <module>
f=open(b'âªâ¬')
File "/root/Py3kb1/lib/python3.0/io.py", line 280, in __new__
return open(*args, **kwargs)
File "/root/Py3kb1/lib/python3.0/io.py", line 180, in open
raise TypeError("invalid file: %r" % file)
TypeError: invalid file: b'âªâ¬'
so, how do you deal with bytes in these cases?
nirinA
--
_______________________________________________
Python-3000 mailing list
Python-3000@python.org
http://mail.python.org/mailman/listinfo/python-3000
Unsubscribe:
http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
