Guys,
Frescobaldi has the useful 'slur for the selected notes' snippet under C-(.
I want to have the same functionality for beams. That is, I want to be able
to select some notes, and then via the snippet insert a '[' in the first
space (that is, after the first note), and then a ']' at the end.
Unfortunately, I have never in my life written a line of python... till
this day, that is. So, I'm trying the following ('W' is for whitespace):
1 -*- name: mybeam; python; selection: strip;
2 x = 0
3 mysequence = text
4 while x < len(text):
5 WW if text[x] == ' ':
6 WWWW mysequence[x] = '['
7 WWWW break
8 WW x = x + 1
9 text = mysequence + ']'
Notice that line 5 contains a space between the quotes. Of course I need to
add conditions regarding what to do if there's no space in the selection
etc. But that's for later, once this basic script actually works. As you
can see, I thought I'd copy the selection to 'mysequence' string to
manipulate on it; this is probably unneeded. But after writing the above I
got, at line 5, an error "TypeError: 'unicode' object does not support item
assignment".
What I found weird is that to my untrained eyes line 5 does no assigning,
but rather checks whether the xth element of the string text is a space.
Anyway, after some googling I decided to substitute "is" for "==" in line
5. Right now the script does not give any errors, but it only adds a ']' at
the end of the selection. I'm apparently unable to check whether the xth
element of the string text is a space. I tried
if text[x] == ' %d':
and
if text[x] == u"\u0020":
and
if text[x].isspace():
to no avail (the last one gave the "unicode object does not support item
assignment" error again, which I don't understand at all, having copied the
command from
http://www.ehow.com/how_12112665_determine-character-whitespace-python.html).
Could anyone give me a hint on this?
Best regards,
Leszek.
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