[PySide] [PySide strings returned from widgets have extra blank bytes between the letters][2014.07.25]

[Daniel Gollás]

Hello, It was suggested on this thread in the forums 
(http://qt-project.org/forums/viewthread/45374/) that this might be 
something interesting for the pyside devs to look at.
The summary is the following:


    I built pyside using the buildscripts on CentOS 6.5 and Qt 4.8
    (installed using these
    reposhttp://www.qtcentre.org/threads/56495-How-to-install-4-8-on-CentOS-6)
    <http://www.qtcentre.org/threads/56495-How-to-install-4-8-on-CentOS-6%29>on
    a virtual environment using Python 2.7

    I tested an application that works perfectly fine on Windows
    andOSXand found that whenever I printed a string from a widget (ie.
    comboBox.currentText() where comboBox is a QComboBox) I was missing
    half the string.

    Checking the length of the returned object I found that it had the
    correct length, but uppon further inspection I realized it had an
    extra blank byte between each letter. For example, a QLineEdit with
    the text "hello" would only print "hel".

    Printing the string as hex bytes using:

     1.
        print":".join(['%0X'%ord(b)forb in myString])

    resulted in something like 68:0:65:0:6C, where indeed there is a 0
    byte between each character.

    TheGUIis built using pyside-uic from ui files created in the Creator.

    This sounds like I'm getting two byte unicode characters, but why am
    I only getting half the bytes?


I found and solved the issue but it might help somebody or even be worth 
documenting:


    CentOS 6.5 comes with Python 2.6 and I had created my virtual
    environment with Python 2.7 compiled from source.

    I recompiled Python 2.7 adding ---enable-unicode=ucs4 when
    configuring the build. The default is to compile with
    ---enable-unicode=ucs2

    so in the end I compiled like this:

     1.
        ./configure--prefix/usr/local--enable-shared--enable-unicode=ucs4
     2.
        make
     3.
        make altinstall

    I recreated my virtualenv with the newly compiled python and
    everything works as it should!


Cheers!
Daniel Gollás



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