Fail to get data on using read() of StringIO in python

Question

Using Python2.7 version. Below is my sample code.

import StringIO
import sys

buff = StringIO.StringIO()
buff.write(\"hello\")
print buff.read()

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Answer 1

In [38]: out_2 = StringIO.StringIO('not use write') # be initialized to an existing string by passing the string to the constructor

In [39]: out_2.getvalue()
Out[39]: 'not use write'

In [40]: out_2.read()
Out[40]: 'not use write'

or

In [5]: out = StringIO.StringIO()

In [6]: out.write('use write')

In [8]: out.seek(0)

In [9]: out.read()
Out[9]: 'use write'