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Questions tagged [stringio]

Use for questions concerning the Python 2 module StringIO or the class StringIO it contains. In Python 3, this refers to the class StringIO of the io module.

Python class StringIO allows to read and write a string buffer (also known as memory files).

355 questions
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How to make cStringIO transparent to another function that expects a real local file

I came up with the following problem: CODE A works right now.. I am saving a png file called chart.png locally, and then I am loading it into the proprietary function (which I do not have access). However, in CODE B, am trying to use…
relima
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Convert a Python list of lists to a string

How can I best convert a list of lists in Python to a (for example) comma-delimited-value, newline-delimited-row, string? Ideally, I'd be able to do something like this: >import csv >matrix = [["Frodo","Baggins","Hole-in-the-Ground,…
Simon Lepkin
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MemoryError zipfile in memory

I'm getting MemoryError (out of memory) when zipping files in memory with Python. I'm using cStringIO.StringIO as an in memory buffer stream. Follow the code below: zip_file = cStringIO.StringIO() with zipfile.ZipFile(file=zip_file,…
willian coelho
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Porting from Python 2 to Python 3: 'utf-8 codec can't decode byte'

Hey I tried to port that little snippet to Python 3 from 2. Python 2: def _download_database(self, url): try: with closing(urllib.urlopen(url)) as u: return StringIO(u.read()) except IOError: self.__show_exception(sys.exc_info()) …
Fragkiller
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Extracting bz2 file with single file in memory

I have a csv file compressed into a bz2 file that I'm trying to load from a website, decompress, and write to a local csv file by # Get zip file from website archive = StringIO() url_data = urllib2.urlopen(url) archive.write(url_data.read()) #…
Daniel Underwood
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Is there any advantage to using BytesIO with markdown instead of open / read in Python?

Considering the following code: from markdown import markdown f = open('myfile.md', 'r') html_text = markdown(f.read()) f.close() Is there any speed advantage or disadvantage to using io.BytesIO and markdownFromFile? Or is it a wash? from markdown…
FlipperPA
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How to load a image into a label without saving to hard drive python Tkinter

I am working on a project where I have a list with a couple of StringIO in it. I want to load those into a Tkinter label but I get this error: IOError: cannot identify image file. I understand that it means it can not find the image file. But how…
Unknown Code
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POST StringIO object and open with PIL

When I posted the image load with StringIO, and usd the web.py to obtain the StringIO object, I could not open it with PIL. My POST code is: # encoding:utf-8 import requests from StringIO import StringIO img = open('test.jpg').read() img =…
user3315842
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How do I pass multiple StringIO into python-pdfkit?

Goal: - Use django templateing language. - Render the template in memory (no disk writes). - Push rendered content to StringIO instance. - Use instance in python-pdfkit. Issue: I keep getting TypeError: coercing to Unicode: need string or buffer,…
cph
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Python StringIO is not correctly capturing data from stderr

I have written some unittests that analyze data that is logged with the standard python logging function. Using some of the ideas that I found here: Capture stdout from a script in Python about how to capture data from stderr, I have come up with…
Alexander Marquardt
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Sinatra, Twitter, and StringIO

The Twitter API allows you to add media to your tweet via their update_with_tweet method. I am using Sinatra and have my Twitter configurations all set up. I am able to succesfully post tweets with my app. My app reads a webpage, extracts the photos…
kittyminky
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Extract zip to memory, parse contents

I want to read the contents of a zip file into memory rather than extracting them to disc, find a particular file in the archive, open the file and extract a line from it. Can a StringIO instance be opened and parsed? Suggestions? Thanks in…
Captain Caveman
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How to overcome memory issue when sequentially appending files to one another

I am running the following script in order to append files to one another by cycling through months and years if the file exists, I have just tested it with a larger dataset where I would expect the output file to be roughly 600mb in size. However I…
AEA
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How can I get the response body from pycurl multi curl requests

I am unable to get anything but empty responses when performing curl multi requests. No exceptions are thrown, but the response value has no content (commented in the below snippet) Here's a simplified version of my code: from StringIO import…
Tom Manterfield
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PyGame load cStringIO as image

So, I've tried a few solutions on the net for this but each one returns a different error. Most recently I've decided to try something like: import cStringIO, pygame, os from pygame.locals import * pygame.init() mainClock =…
John
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