我在Python中解析一个大型XML文件。大型XML文件的相关部分如下：
<?xml version="1.0" encoding="utf-8"?>
<posthistory>
<row Id="1332647" PostHistoryTypeId="5" PostId="723397" RevisionGUID="cd3aafe8-47ee-497d-a4e8-948c2a769d7e" CreationDate="2009-04-06T22:27:07.567" UserId="40414" Comment="Added examples of articles and filenames" Text="I have a large number of text files (1000+) containing articles from academic journals. Each article's file contains a "stub" from the end of the previous article (at the beginning) and from the beginning of the next article (at the end). I need to remove these stubs in preparation for running a frequency analysis on the articles because the stubs are duplicate data. 

I know I can use diff to output the differences between the files, ignore whitespace and treat the files as text, and then compare them manually, but this doesn't male much sense when dealing with this much data. Accuracy does not have to be 100%, so a script that compared each file to the next file and then removed 1 copy of the duplicate text would be perfect. This seems like it would be a pretty common issue when programming so I am surprised that I haven't been able to find anything that does this.

The file names sort in order, so a script that compares each file to the next sequentially should work. E.G.

<pre>bul_9_5_181.txt
bul_9_5_186.txt
</pre>

are two articles, one starting on page 181 and the other on page 186. 

Note: I am an academic doing content analysis of old journal articles for a project in the history of psychology. I am no programmer, but I do have 10+ years experience with linux and can usually figure things out as I go. 

Thanks for your help

<b>---example stub at beginning of file: everything before "AFFECTIVE PHENOMENA — EXPERIMENTAL" is duplicate from previous file----</b>

SYN&STHESIA

ISI

the majority of Portugese words signifying black objects or ideas relating to black. This association is, admittedly, no true synsesthesia, but the author believes that it is only a matter of degree between these logical and spontaneous associations and genuine cases of colored audition.
REFERENCES

DOWNEY, JUNE E. A Case of Colored Gustation. Amer. J. of Psycho!., 1911, 22, S28-539MEDEIROS-E-ALBUQUERQUE. Sur un phenomene de synopsie presente par des millions de sujets. / . de psychol. norm, et path., 1911, 8, 147-151. MYERS, C. S. A Case of Synassthesia. Brit. J. of Psychol., 1911, 4, 228-238.

AFFECTIVE PHENOMENA — EXPERIMENTAL
BY PROFESSOR JOHN F. .SHEPARD
University of Michigan

Three articles have appeared from the Leipzig laboratory during the year. Drozynski (2) objects to the use of gustatory and olfactory stimuli in the study of organic reactions with feelings, because of the disturbance of breathing that may be involved. He uses rhythmical auditory stimuli, and finds that when given at different rates and in various groupings,

<b>---this is from the end of the same file, everything AFTER "1911. Pp.39" is duplicate from the next article---</b>

Pleasantness of Colors. Arner. J. of Psychol., 1911, 22, 578-579. 8. WASHBURN, M. F . and CRAWFORD, D . Fluctuations in the Affective Value of Colors During Fixation for One Minute. Amer. J. of Psychol., 1911, 22, 579-J82. 9. WELLS, F . L. and FORBES, A. On Certain Electrical Processes in the Human Body and their Relation to Emotional Reactions. (No. 16 of Archives of Psychology). New York: The Science Press, 1911. Pp. 39.

AFFECTIVE PHENOMENA — DESCRIPTIVE AND THEORETICAL
BY PROFESSOR H. N. GARDINER Smith College

Fundamental questions are discussed systematically by Rehmke (18) in a second edition of a well-digested treatise, a characteristic feature of which is its attempt to relate feeling, emotion and mood.
Feeling (Gefuhl) is defined as a Bestimmtheitsbesonderheit des zustdnd-

lichen Bewusstseins. Consciousness being conceived as the individual soul, its state is assumed to be at any given moment simple and unique; hence the momentary feeling is always one of pleasure or displeasure, never "mixed." It is determined, not by any one, but by the totality of the objective factors, those being massgebend which are in the focus of attention. A " feeling," in the ordinary sense, is a complex of the affective state and the "determining" and "accompanying" objective components, the "determining" objects of attention giving the kind of feeling, the "accompanying" organic sensations being mainly responsible for its obscure "coloring" and its degree. Mood (Stimmung) appears in a certain contrast to "feeling" in that in it organic sensation is the "determining" factor and no particular object occupies the focus of attention. Emotion {Affeki) is not contrasted with "feeling," but is "feeling" characterized by the intensity of the "accompanying" organic sensations, which are rightly included in the emotion; we must not, however, confuse, with James and Lange, the bodily changes which give rise

<b>---end example---</b>" />
</posthistory>
我正在使用iterparse模块来解析这个XML。
'''
Function provides fast iteration of XML files via iterparse
Source - Listing 5 at Source - http://www.ibm.com/developerworks/xml/library/x-hiperfparse/
'''
def fast_iter(context, func):
try:
for event, elem in context:
func(elem)
elem.clear()
while elem.getprevious() is not None:
del elem.getparent()[0]
del context
except etree.XMLSyntaxError, e:
print e
我收到以下带有以下跟踪的XMLSyntaxError
Input is not proper UTF-8, indicate encoding !
Bytes: 0x97 0x20 0x45 0x58, line 3, column 1694
一些要点 -
[1]必须使用iterparse模块，因为XML的大小为3GB（或更多）。
[2]我只提供了抛出语法错误的那部分XML文件。
我的问题如下：
[1]我可以自动修复此问题吗？如果是这样，怎么样？
[2]我可以手动修复此问题吗？如果是这样，怎么样？
[3]我可以忽略这个问题并继续解析我的大型XML文件吗？如果是这样，怎么样？
我见过以下资源：
How should I deal with an XMLSyntaxError in Python's lxml while parsing a large XML file?
Ignore encoding errors in Python (iterparse)?
Is there a way to recover iterparse on invalid Char values?
但没有人能回答我的问题。
答案 0 :(得分：1)
你的问题是你告诉解析器，当实际上是Windows CP-1252时，XML是UTF-8编码的。字符串
0x97 0x20 0x45 0x58
是（当解释为CP-1252时）
emdash space E X
如果你看一下给定偏移处的违规行中的文字，你确实会看到emdash。问题是0x97不是UTF-8编码中的有效字符。
在Unicode中，emdash字符为—，当UTF-8编码时，它表示为三个字节：0xE2 0x80 0x94。
解决方案是确保数据以UTF-8正确编码，或更改标题以指示正确的编码。