stringio

I'm using python 3.5 and flask 0.10.1 and liking it, but having a bit of trouble with send_file. I ultimately want to process a pandas dataframe (from Form data, which is unused in this example but necessary in the future) and send it to download as a csv (without a temp file). The best way to accomplish this I've seen is to us StringIO. Here is the code I'm attempting to use: @app.route('/test_download', methods = ['POST']) def test_download(): buffer = StringIO() buffer.write('Just some letters.') buffer.seek(0) return send_file(buffer, as_attachment = True,\ attachment_filename = 'a_file

I need to stub tempfile and StringIO seemed perfect. Only that all this fails in an omission: In [1]: from StringIO import StringIO In [2]: with StringIO("foo") as f: f.read() --> AttributeError: StringIO instance has no attribute '__exit__' What's the usual way to provide canned info instead of reading files with nondeterministic content? The StringIO module predates the with statement. Since StringIO has been removed in Python 3 anyways, you can just use its replacement, io.BytesIO : >>> import io >>> with io.BytesIO(b"foo") as f: f.read() b'foo' this monkeypatch works for me in python2.

I'm porting ebay sdk to python3 and I've stumbled upon the following issue. I'm using pycurl to send some HTTP requests. Here is how I configure it: self._curl = pycurl.Curl() self._curl.setopt(pycurl.FOLLOWLOCATION, 1) self._curl.setopt(pycurl.URL, str(request_url)) self._curl.setopt(pycurl.SSL_VERIFYPEER, 0) self._response_header = io.StringIO() self._response_body = io.StringIO() self._curl.setopt(pycurl.CONNECTTIMEOUT, self.timeout) self._curl.setopt(pycurl.TIMEOUT, self.timeout) self._curl.setopt(pycurl.HEADERFUNCTION, self._response_header.write) self._curl.setopt(pycurl.WRITEFUNCTION,

Using Python2.7 version. Below is my sample code. import StringIO import sys buff = StringIO.StringIO() buff.write("hello") print buff.read() in the above program, read() returns me nothing where as getvalue() returns me "hello". Can anyone help me out in fixing the issue? I need read() because my following code involves reading "n" bytes. You need to reset the buffer position to the beginning. You can do this by doing buff.seek(0) . Every time you read or write to the buffer, the position is advanced by one. Say you start with an empty buffer. The buffer value is "" , the buffer pos is 0 .

Using StringIO as string buffer is slower than using list as buffer. When is StringIO used? from io import StringIO def meth1(string): a = [] for i in range(100): a.append(string) return ''.join(a) def meth2(string): a = StringIO() for i in range(100): a.write(string) return a.getvalue() if __name__ == '__main__': from timeit import Timer string = "This is test string" print(Timer("meth1(string)", "from __main__ import meth1, string").timeit()) print(Timer("meth2(string)", "from __main__ import meth2, string").timeit()) Results: 16.7872819901 18.7160351276 If you measure for speed, you should

The code below works when typed manually however when I run the program.py nothing prints. My ultimate goal is to retrieve this data from user pc to create an easy way to recreate shortcuts.... My users somehow lose them lol import smtplib, os, subprocess, sys from string import ascii_uppercase from cStringIO import StringIO data = os.popen(r"dir %userprofile%\desktop\*.lnk* /s/b").read() file = open("testitem.txt", "w") file.write(data) file.close() my_data = dict(zip(ascii_uppercase,open("testitem.txt"))) old_stdout = sys.stdout sys.stdout = mystdout = StringIO() for key, value in my_data