Question

I’m trying to write multiple files to a directory with very little changed in between each file (eg. incremental id numbers) When I try run my program, it fails after writing about 5 files. But when I try it again and re-select the source file, it works. Here’s my code:

if not os.path.isdir(self.fDirectory + "/AutoGen" + strftime("%Y-%m-%d %H:%M:%S",           gmtime())):
        os.mkdir(self.fDirectory + "/AutoGen" + strftime("%Y-%m-%d_%H.%M.%S", gmtime()))

    anum = 0
    for x in range(len(self.csvdata)-1):
        for y in range(len(self.csvdata[x+1])):
            self.myRoot.find(self.csvdata[0][y]).text = self.csvdata[x][y]
        anum+=1
        myTree.write(self.fDirectory + "/AutoGen" + strftime("%Y-%m-%d_%H.%M.%S", gmtime()) + "/" + self.filename + "_" + str(anum) + ".xml")

And here’s the error I’m getting:

Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python32\lib\tkinter\__init__.py", line 1399, in __call__
return self.func(*args)
File "C:\Users\CNash\Documents\XML Generator\XMLGen.py", line 148, in doIt
myTree.write(self.fDirectory + "/AutoGen" + strftime("%Y-%m-%d_%H.%M.%S", gmtime()) + "/" + self.filename + "_" + str(anum) + ".xml")
File "C:\Python32\lib\xml\etree\ElementTree.py", line 836, in write
file = open(file_or_filename, "wb")
 IOError: [Errno 2] No such file or directory: 'C:/Users/CNash/Documents/XML Generator/AutoGen2012-07-31_20.23.52/EXuTest_DOCD00140_6.xml'

Any ideas much appreciated!

Answer 1

For one, use os.path.join, it will make your life easier.

And it looks to me that the first and last calls to strftime happen at different times (and you left out an underscore in your first one). The script can’t find the directory, because it doesn’t exist. One named with a time a few seconds before probably, even suspiciously, does, I bet.

Try replacing your first if-statement with

dirname = os.path.join(self.fDirectory,strftime("AutoGen%Y-%m-%d_%H.%M.%S",gmtime()))

if not os.path.isdir(dirname):
    os.mkdir(dirname)

and the last line with:

myTree.write(os.path.join(dirname, self.filename + "_" + str(anum) + ".xml"))