Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.025 X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; 'subject:Python': 0.06; 'context': 0.07; 'error:': 0.07; 'referring': 0.07; 'tkinter': 0.07; 'api': 0.11; 'def': 0.12; "'w')": 0.16; 'subject:File': 0.16; 'tkinter.': 0.16; 'typeerror:': 0.16; 'exception': 0.16; 'files.': 0.16; 'wrote:': 0.18; 'trying': 0.19; 'file,': 0.19; 'skip:f 30': 0.19; 'written': 0.21; 'help.': 0.21; 'header:User- Agent:1': 0.23; 'paul': 0.24; 'skip:" 20': 0.27; 'header:In-Reply- To:1': 0.27; 'function': 0.29; "i'm": 0.30; 'code': 0.31; 'getting': 0.31; 'file:': 0.31; 'file': 0.32; 'probably': 0.32; 'another': 0.32; 'text': 0.33; 'open': 0.33; 'skip:d 20': 0.34; 'created': 0.35; 'but': 0.35; 'google': 0.35; 'in:': 0.36; 'should': 0.36; 'being': 0.38; 'manager': 0.38; 'to:addr:python- list': 0.38; 'pm,': 0.38; 'realize': 0.39; 'received:71': 0.39; 'though,': 0.39; 'sure': 0.39; 'to:addr:python.org': 0.39; 'then,': 0.60; 'received:208': 0.61; 'you.': 0.62; 'name': 0.63; 'such': 0.63; 'more': 0.64; 'love': 0.65; 'experience.': 0.67; 'close': 0.67; 'invalid': 0.68; 'caused': 0.69; 'to,': 0.72; 'as:': 0.81; 'received:208.70': 0.91; 'step.': 0.91 Date: Wed, 18 Jun 2014 16:20:23 -0700 From: Paul McNett User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Python Fails to Write to File References: <8aaa4195-af5c-4ba3-a891-b1f268c086ac@googlegroups.com> In-Reply-To: <8aaa4195-af5c-4ba3-a891-b1f268c086ac@googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 52 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1403133632 news.xs4all.nl 2909 [2001:888:2000:d::a6]:40715 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:73386 On 6/18/14, 4:03 PM, cutey Love wrote: > I'm trying to write data to a text file > > But I'm getting the error: > > TypeError: invalid file: <_io.TextIOWrapper Always better to err on posting too much context (the entire traceback) than too little. > Code is > > def saveFile(): > file_path = filedialog.asksaveasfile(mode='w', filetypes=[('text files', '.txt')], defaultextension=".txt") > fo = open(file_path, 'w') I used Google (searched on "filedialog.asksaveasfile") to realize that you are likely using Tkinter. I then used Google to find out the API for filedialog.asksaveasfile() and I found that it returns the ALREADY OPEN FILE for you to write to, not the name of the file you are writing to. Referring to that same documentation, I see there's another function you are probably more interested in: filedialog.asksaveasfilename(). Then, you can open the file, write to it, and close it and be in control of every step. Not sure which is preferable, though, as I have no (recent) Tkinter experience. > > for e in myList: > fo.write(e) > > > fo.close() You should use a context manager to open, write to, and close files. Such as: with open(file_path, 'w') as fo: for e in myList: fo.write(e) > The file is being created if not already present but no data is written filedialog.asksaveasfile() was opening it for you. It was being closed automatically when file_path fell out of scope (after the exception caused by your fo = open(file_path, 'w') line. My response was intended to help. Paul