Can anyone figure out my problem [Python]

I have been trying to debug the below python cgi code but doesn't seems to work. When i try in new file it these three lines seems to work

filename=unique_file('C:/wamp/www/project/input.fasta')
prefix, suffix = os.path.splitext(filename)
fd, filename = tempfile.mkstemp(suffix, prefix+"_", dirname)

But, when i try like this way then i get error unique_file is not define >>>

form=cgi.FieldStorage()
i=(form["dfile"].value)
j=(form["sequence"].value)
if (i!="" and j=="" ):
    filename=(form["dfile"].filename)
    (name, ext) = os.path.splitext(filename)
    alignfile=name + '.aln'
elif(j!="" and i==""):
    filename=unique_file('C:/wamp/www/project/input.fasta')
    prefix, suffix = os.path.splitext(filename)
    fd, filename = tempfile.mkstemp(suffix, prefix+"_", dirname)
    file = open(filename, 'w')
    value=str(j)
    file.write(value)
    file.close()
    (name, ext) = os.path.splitext(filename)
    alignfile=name + '.aln'
开发者_StackOverflow社区

What i am trying to do is check two options from form:- Fileupload and textarea. If fileupload is true then there is nothing to do except separating file and its extension. But when textarea is true then i have to generate unique file name and write content in it and pass filename and its extension.

Error i got is...

type 'exceptions.NameError'>: name 'unique_file' is not defined
  args = ("name 'unique_file' is not defined",)
  message = "name 'unique_file' is not defined"

Any suggestions and corrections are appreciated

Thanks for your concern

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unique_file() isn't a built-in function of Python. So I assume, either you forget a line in your first code snippet which actually imports this function, or you configured your python interpreter to load a startup file (http://docs.python.org/using/cmdline.html#envvar-PYTHONSTARTUP). In the second case, the CGI script can't find this function because it runs with the web server identity which probably lacks the PYTHONSTARTUP env. variable definition.

---

You need to either import or define your unique_file method before using it.

They will look something like:

from mymodule import unique_file

or:

def unique_file():
    # return a unique file

---

Usually when a compiler or interpreter says something isn't defined, that's precisely what the problem is. So, you have to answer the question "why is it not defined?". Have you actually defined a method named "unique_file"? If so, maybe the name is misspelled, or maybe it's not defined before this code is executed.

If the function is in another file or module, have you imported that module to gain access to the function?

When you say it works in one way but not the other, what's the difference? Does one method auto-import some functions that the other does not?

Since unique_file is not a built-in command, you're probably forgetting to actually define a function with that name, or forgetting to import it from an existing module.