[Boa Constr] Help: Boa doesn't start all the way / can't run Boa...

[<Qb...@t-...>]

First of all: Hi everybody. I'm new to the list and traffic seems low so I'll 
introduce myself. Nevertheless I hope to find lots of Python junkies here :-)
I wanna get going with Python and chose Boa as my GUI for starts.

Here's my first Problem when I start it from the commandline:

qbert@engine:~/Boa-0.0.5 > Boa.py
: command not found
: command not found

I see a cross as mousecursor but nothing else. I klick, the speaker beeps Boa 
end with this;

: command not found
./Boa.py: line 20: syntax error near unexpected token `trace_func(f'
'/Boa.py: line 20: `def trace_func(frame, event, arg):
qbert@engine:~/Boa-0.0.5 >

I'm running the SuSE 7.2 Pro distro with KDE 2.2.1.

Thanks for the help in advance.