StringIO in Python3

Question

I am using Python 3.2.1 and I can\'t import the StringIO module. I use io.StringIO and it works, but I can\'t use it with numpy\'s

Answer 1

In my case I have used:

from io import StringIO

Answer 2

In order to make examples from here work with Python 3.5.2, you can rewrite as follows :

import io
data =io.BytesIO(b"1, 2, 3\n4, 5, 6") 
import numpy
numpy.genfromtxt(data, delimiter=",")

The reason for the change may be that the content of a file is in data (bytes) which do not make text until being decoded somehow. genfrombytes may be a better name than genfromtxt.

Answer 3

try this

from StringIO import StringIO

x="1 3\n 4.5 8"

numpy.genfromtxt(StringIO(x))

Answer 4

when i write import StringIO it says there is no such module.

From What’s New In Python 3.0:

The StringIO and cStringIO modules are gone. Instead, import the io module and use io.StringIO or io.BytesIO for text and data respectively.

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A possibly useful method of fixing some Python 2 code to also work in Python 3 (caveat emptor):

try:
    from StringIO import StringIO ## for Python 2
except ImportError:
    from io import StringIO ## for Python 3

Note: This example may be tangential to the main issue of the question and is included only as something to consider when generically addressing the missing StringIO module. For a more direct solution the message TypeError: Can't convert 'bytes' object to str implicitly, see this answer.

Answer 5

You can use the StringIO from the six module:

import six
import numpy

x = "1 3\n 4.5 8"
numpy.genfromtxt(six.StringIO(x))

Answer 6

On Python 3 numpy.genfromtxt expects a bytes stream. Use the following:

numpy.genfromtxt(io.BytesIO(x.encode()))