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The print function in Python will convert printed arguments to text
strings [1] and thus print() cannot be used with binary mode file
objects.
In Python 2 the write() method of BytesIO() takes as input *bytes* object
which refers to *str* in Python 3. [2] The write() method of StringIO()
takes *unicode* object. [3] Therefore, StringIO() object cannot be used with
the print() function.
In Python 3 the write() method of BytesIO() takes a *bytes* object (not
*str*). [4] Therefore, the BytesIO() obj cannot be used with print().
However, the write() method of StringIO() in Python 3 takes a *str* as
input.[5]
Example of the issue:
from __future__ import print_function
import io
a = io.BytesIO()
b = io.StringIO()
print("test", file=a) <- Fails for Python 3
print("test", file=b) <- Fails for Python 2
a.write('%s\n' % "test") <- Fails for Python 3
b.write('%s\n' % "test") <- Fails for Python 2
[1] https://docs.python.org/3.5/library/functions.html#print
[2] https://docs.python.org/2/library/io.html#io.BufferedWriter.write
[3] https://docs.python.org/2/library/io.html#io.TextIOBase.write
[4] https://docs.python.org/3/library/io.html#io.BufferedWriter.write
[5] https://docs.python.org/3/library/io.html#io.TextIOBase.write
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| .. | ||
| capabilities-xml | ||
| cli-test-xml | ||
| clone-xml | ||
| hostkeymap | ||
| inject-data | ||
| interface-xml | ||
| nodedev-xml/devxml | ||
| storage-xml | ||
| uitests | ||
| virtconv-files | ||
| xmlconfig-xml | ||
| xmlparse-xml | ||
| __init__.py | ||
| capabilities.py | ||
| checkprops.py | ||
| clitest.py | ||
| clonetest.py | ||
| hostkeymap.py | ||
| interface.py | ||
| magicuri | ||
| misc.py | ||
| nodedev.py | ||
| osdict.py | ||
| pycodestyle.cfg | ||
| pylint.cfg | ||
| storage.py | ||
| test_inject.py | ||
| test_urls.ini | ||
| test_urls.py | ||
| testdriver.xml | ||
| uriparse.py | ||
| utils.py | ||
| virtconvtest.py | ||
| xmlconfig.py | ||
| xmlparse.py | ||