Re: NamedTemporaryFile does not match documentation

Discussion in 'Python' started by Serhiy Storchaka, Feb 21, 2013.

  1. On 21.02.13 22:46, Jason Friedman wrote:
    > Python 3.2.2 (default, Feb 14 2012, 08:06:31)
    > [GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2
    > Type "help", "copyright", "credits" or "license" for more information.
    >>>> from tempfile import NamedTemporaryFile
    >>>> f = NamedTemporaryFile(delete=False)
    >>>> f

    > <tempfile._TemporaryFileWrapper object at 0x7f867e8bc050>
    >>>> f.name

    > '/tmp/tmpqxnd_4'
    >>>> f.write("Hello World!\n")

    > Traceback (most recent call last):
    > File "<stdin>", line 1, in <module>
    > TypeError: 'str' does not support the buffer interface
    >
    > Or, maybe I am reading the documentation incorrectly. My goal is to
    > be able to write to that temporary file along the lines of "f.write()"
    > or "with open(f) as writer ...".


    NamedTemporaryFile by default opens a file in binary mode ('w+b'). Write
    bytes or specify text mode.

    >>> f.write(b"Hello World!\n")

    13
    >>> ft = NamedTemporaryFile('w+', delete=False)
    >>> ft.write("Hello World!\n")

    13
     
    Serhiy Storchaka, Feb 21, 2013
    #1
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