import os
from os.path import splitext,basename
import sys
from lxml import etree
#clean out old files
def cleanBrds(args, dirname,files):
print "checking "+dirname
for file in files:
if file.endswith("_pyclean.brd"):
if os.path.exists(file):
print "removing "+file
os.remove(file)
#prep files
def sanBrds(args, dirname,files):
print "checking "+dirname
for file in files:
if file.endswith(".brd"):
print "found "+file
newfile = splitext(basename(file))[0]+"_pyclean.brd"
tree=etree.parse(file)
for elem in tree.xpath('//signal'):
elem.getparent().remove(elem)
f=open(newfile,'w')
f.write(etree.tostring(tree))
f.close();
base_dir="."
os.path.walk(base_dir,cleanBrds,None)
os.path.walk(base_dir,sanBrds,None)
# python prepbrd.py checking . checking ./naut checking . found erct.brd checking ./naut found nautctrl.brd Traceback (most recent call last): File "prepbrd.py", line 43, in <module> os.path.walk(base_dir,sanBrds,None) File "/usr/lib/python2.6/posixpath.py", line 236, in walk walk(name, func, arg) File "/usr/lib/python2.6/posixpath.py", line 228, in walk func(arg, top, names) File "prepbrd.py", line 22, in sanBrds tree=etree.parse(file) File "lxml.etree.pyx", line 2706, in lxml.etree.parse (src/lxml/lxml.etree.c:49958) File "parser.pxi", line 1500, in lxml.etree._parseDocument (src/lxml/lxml.etree.c:71797) File "parser.pxi", line 1529, in lxml.etree._parseDocumentFromURL (src/lxml/lxml.etree.c:72080) File "parser.pxi", line 1429, in lxml.etree._parseDocFromFile (src/lxml/lxml.etree.c:71175) File "parser.pxi", line 975, in lxml.etree._BaseParser._parseDocFromFile (src/lxml/lxml.etree.c:68173) File "parser.pxi", line 539, in lxml.etree._ParserContext._handleParseResultDoc
(src/lxml/lxml.etree.c:64257) File "parser.pxi", line 625, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:65178) File "parser.pxi", line 563, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:64493) IOError: Error reading file 'nautctrl.brd': failed to load external entity "nautctrl.brd"
我对这一点还不熟悉,但似乎我可能无法从中正确传递参数os.path.walk操作系统其他功能。我要删除以结尾的所有文件_pyclean.brd首先,然后对其余的.brd文件(xml)进行操作。这些函数在平面目录中工作得很好,但是递归地我得到了上面的错误。在
files
中的文件名是短名称。要使用可以使用os.path.join
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