我有一个在kivy下运行的程序,该程序在Windows上可以正常运行,但无法在Android(两个平台上均为1.8.0)上打开文件。奇怪的是,错误消息表明当我明确要求utf-8时,它正在尝试对ASCII进行解码。而且文件中的任何地方都没有0xFF字符-我通过od
实用程序进行了检查。
代码:
try:
Logger.info('Mark: opening file ' + repr(filename))
with codecs.open(filename, 'r', encoding='utf_8') as f:
lines = [line.rstrip(u'\r\n').lstrip(codecs.BOM) for line in f]
except UnicodeDecodeError as e:
Logger.info('Mark: utf8 load failed: ' + str(e))
with codecs.open(filename, 'r', encoding='cp1252') as f:
lines = [line.rstrip(u'\r\n') for line in f]
日志文件:
[INFO ] Mark: opening file '/mnt/sdcard/My Files/Documents/DVDs.txt'
[INFO ] Mark: utf8 load failed: 'ascii' codec can't decode byte 0xff in position 0: ordinal not in range(128)
[INFO ] Base: Leaving application in progress...
[WARNING ] stderr: Traceback (most recent call last):
[WARNING ] stderr: File "main.py", line 295, in <module>
[WARNING ] stderr: app.run()
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/app.py", line 792, in run
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/base.py", line 481, in runTouchApp
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/core/window/window_pygame.py", line 381, in mainloop
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/core/window/window_pygame.py", line 287, in _mainloop
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/base.py", line 321, in idle
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/clock.py", line 422, in tick
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/clock.py", line 537, in _process_events
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/site-packages/kivy/clock.py", line 309, in tick
[WARNING ] stderr: File "main.py", line 266, in select_file_part2
[WARNING ] stderr: with codecs.open(filename, 'r', encoding='cp1252') as f:
[WARNING ] stderr: File "/home/tito/code/python-for-android/build/python-install/lib/python2.7/codecs.py", line 884, in open
[WARNING ] stderr: LookupError: unknown encoding: cp1252
编辑:我输入了一些调试代码来遍历整个列表,发现除了,和各种编解码器之外ascii
,所有其他代码都丢失latin_1
了utf
。
摆脱try / except并查看真正的异常。codecs.BOM
是一个字节字符串\xff\xfe
,使用默认ascii
编解码器将其强制转换为Unicode :
>>> import codecs
>>> codecs.BOM
'\xff\xfe'
>>> u'test'.lstrip(codecs.BOM)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xff in position 0: ordinal not in range(128)
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