context_clean.py exception

[slawkory]

As I understand after compilation of PyNEC, component is added only for python2.7 so I used 2.7.
There was exception in my environment for
python2.7 dipole.py
Wavelength is 0.1224m, initial length is 0.0612m

Traceback (most recent call last):
  File "dipole.py", line 96, in <module>
    z = impedance(design_freq_mhz, initial_length, nr_segments)
  File "dipole.py", line 40, in impedance
    nec = geometry(freq_mhz, length, nr_segments)
  File "dipole.py", line 17, in geometry
    nec.set_extended_thin_wire_kernel(False)
  File "/home/(..)/python-necpp/PyNEC/example/context_clean.py", line 107, in set_extended_thin_wire_kernel
    self.context.set_extended_thin_wire_kernel(0)
  File "/usr/lib64/python2.7/site-packages/PyNEC.py", line 181, in set_extended_thin_wire_kernel
    return _PyNEC.nec_context_set_extended_thin_wire_kernel(self, ekflag)
TypeError: in method 'nec_context_set_extended_thin_wire_kernel', argument 2 of type 'bool'

To see example result I have added locally that change which works:

+++ b/PyNEC/example/context_clean.py
@@ -101,10 +101,10 @@ class context_clean(object):
     def set_extended_thin_wire_kernel(self, enable):
         if enable:
             debug ("EK", 0)
-            self.context.set_extended_thin_wire_kernel(1)
+            self.context.set_extended_thin_wire_kernel(True)
         else:
             debug ("EK", -1)
-            self.context.set_extended_thin_wire_kernel(0)
+            self.context.set_extended_thin_wire_kernel(False)

BTW: Is there any reconfiguration trick to install PyNec for Python3?

[tmolteno]

I believe this is now working. There have been quite a few changes, but installing via pip should also work now.

[glenndk]

Hi tmolteno - thank for sharing your necpp/PyNEC package. I am starting to learn using them.

Unfortunately I encountered the same exception:

$ python /Volumes/Data13/python/logperiodic_opt.py
Wavelength is 0.1224m, initial length is 0.0612m
Unoptimized antenna...
Traceback (most recent call last):
File "/Volumes/Data13/python/logperiodic_opt.py", line 225, in
show_report(initial_l1, initial_x1, initial_tau)
File "/Volumes/Data13/python/logperiodic_opt.py", line 168, in show_report
nec = geometry_logperiodic(l1, x1, tau)
File "/Volumes/Data13/python/logperiodic_opt.py", line 30, in geometry_logperiodic
nec.set_extended_thin_wire_kernel(True)
File "/Volumes/Data13/python/context_clean.py", line 104, in set_extended_thin_wire_kernel
self.context.set_extended_thin_wire_kernel(1)
File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyNEC.py", line 181, in set_extended_thin_wire_kernel
return _PyNEC.nec_context_set_extended_thin_wire_kernel(self, ekflag)
TypeError: in method 'nec_context_set_extended_thin_wire_kernel', argument 2 of type 'bool'
$

My installation:

$ pip freeze
cycler==0.10.0
kiwisolver==1.1.0
matplotlib==3.0.3
necpp==1.7.3.5
numpy==1.18.0
PyNEC==1.7.3.4
pyparsing==2.4.6
python-dateutil==2.8.1
scipy==1.4.1
six==1.13.0
$

[tmolteno]

Finally fixed. Thanks for reporting.