help with IOError for reading files

for subdir, dirs, files in os.walk(crawlFolder):
    for file in files:
         pri开发者_运维问答nt os.getcwd()
         f=open(file,'r')
         lines=f.readlines()
         writeFile.write(lines)
         f.close()
writeFile.close()   

I get the error as:-

IOError: [Errno 2] No such file or directory

In reference to my partial python code above:-

print os.getcwd() --> C:\search engine\taxonomy

however, the file is located in the directory "C:\search engine\taxonomy\testFolder"

I know the error is because it works in the current directory and I need to append the directory testFolder with file somehow. Could someone please correct my code and help me out with this? Thank you.

The subdir variable gives you the path from crawlFolder to the directory containing file, so you just need to pass os.path.join(crawlFolder, subdir, file) to open instead of a bare file. Like so:

for subdir, dirs, files in os.walk(crawlFolder):
    for file in files:
         print os.getcwd()
         f=open(os.path.join(crawlFolder, subdir, file),'r')
         lines=f.readlines()
         writeFile.write(lines)
         f.close()
writeFile.close()

Incidentally, this is a more efficient way to copy a file into another file:

for subdir, dirs, files in os.walk(crawlFolder):
    for file in files:
         print os.getcwd()
         f=open(os.path.join(crawlFolder, subdir, file),'r')
         writeFile.writelines(f)
         f.close()
writeFile.close()

[EDIT: Can't resist the temptation to play golf:

for subdir, dirs, files in os.walk(crawlFolder):
    for file in files:
         writeFile.writelines(open(os.path.join(crawlFolder, subdir, file)))
writeFile.close()

]