[Eric] utf-8 magic with Eric (and trouble without)

[Detlev Offenbach]

Hi,

the situation is as follows.

The encoding of the runtime environment is set by eric4 depending on the 
encoding of the script. This is determined by the coding line. If no such line 
is found, it defaults to the one returned by sys.getdefaultencoding() or 
latin-1.

This behavior can be changed via the eric4 configuration dialog, Debugger-> 
Python page.

Now to the problem in the script itself. u'\u2192' is a unicode object and not 
an UTF-8 encoded string. However, the later one is required by 
QString.fromUtf8(). That said, the correct line should read

w.setText(QString.fromUtf8(u'\u2192'.encode("utf-8"))

With eric4 setting the system encoding to utf-8, which is triggered by the 
coding line, an implicit conversion happens and the script runs without an 
error.

Regards,
Detlev

On Freitag, 30. Januar 2009, Georg Drees wrote:
> Hello list,
>
> I'm perplexed as to why the following script runs fine
> when called from within Eric ("Run Script") but raises
> an Error when run from the command line.
> The Error also occurs when I remove the line specifying
> the encoding and run it from within Eric.
>
> ---snip main.pyw---
> #!/usr/bin/env python
> # -*- coding: utf-8 -*-
>
> import sys
>
> import PyQt4
> from PyQt4 import QtCore, QtGui
> from PyQt4.QtCore import QString
>
> if __name__=="__main__":
>     app = QtGui.QApplication(sys.argv)
>     w = QtGui.QLabel()
>     w.setText(QString.fromUtf8(u'\u2192'))
>     w.show()
>     sys.exit(app.exec_())
>
> ---snap---
>
> This is the output I get:
> ---snip---
> example$ python ./main.pyw
> Traceback (most recent call last):
>   File "./main.pyw", line 13, in <module>
>     w.setText(QString.fromUtf8(u'\u2192'))
> TypeError: argument 1 of QString.fromUtf8() has an invalid type
> ---snap---
>
> Thanks!
> Georg
>
> P.S.:
> Arch Linux
> Eric4 4.2.5 (r2785)
> Python 2.6.1 (both standalone and within Eric)
> PyQt4 4.4.4


-- 
Detlev Offenbach
detlev at die-offenbachs.de