when i write import StringIO it says there is no such module.
From What’s New In Python 3.0:
The
StringIOandcStringIOmodules are gone. Instead, import theiomodule and useio.StringIOorio.BytesIOfor text and data respectively.
.
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
StringIOmodule. For a more direct solution the messageTypeError: Can't convert 'bytes' object to str implicitly, see this answer.
In my case I have used:
from io import StringIO
It's used when you have some API that only takes files, but you need to use a string. For example, to compress a string using the gzip module in Python 2:
import gzip
import StringIO
stringio = StringIO.StringIO()
gzip_file = gzip.GzipFile(fileobj=stringio, mode='w')
gzip_file.write('Hello World')
gzip_file.close()
stringio.getvalue()
StringIO gives you file-like access to strings, so you can use an existing module that deals with a file and change almost nothing and make it work with strings.
For example, say you have a logger that writes things to a file and you want to instead send the log output over the network. You can read the file and write its contents to the network, or you can write the log to a StringIO object and ship it off to its network destination without touching the filesystem. StringIO makes it easy to do it the first way then switch to the second way.