Scikit 0.3 AttributeError

[Emmy Guy]

Hi

I am relatively new to this API; I find it cool anyway(kudos team scikit). I want to implement a fuzzy controller for a autonomous robot simulation on VREP controlled from Spyder (python 2.7) but in get these errors when implementing the 'Tipping examples'.

i. rule1.view() gives:

Traceback (most recent call last):

 Traceback (most recent call last):

  File "<ipython-input-4-3c5b2551db94>", line 1, in <module>

    runfile('C:/Python27/Lib/site-packages/skfuzzy/control/tipping.py', wdir='C:/Python27/Lib/site-packages/skfuzzy/control')

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 685, in runfile

    execfile(filename, namespace)

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 71, in execfile

    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "C:/Python27/Lib/site-packages/skfuzzy/control/tipping.py", line 39, in <module>

    rule1.view()

  File "C:\Python27\lib\site-packages\skfuzzy\control\rule.py", line 247, in view

    ControlSystemVisualizer(self).view().show()

AttributeError: 'tuple' object has no attribute 'show'

ii. tipping_ctrl = ctrl.ControlSystem([rule1, rule2, rule3]) gives:

Traceback (most recent call last):

  File "<ipython-input-5-3c5b2551db94>", line 1, in <module>

    runfile('C:/Python27/Lib/site-packages/skfuzzy/control/tipping.py', wdir='C:/Python27/Lib/site-packages/skfuzzy/control')

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 685, in runfile

    execfile(filename, namespace)

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 71, in execfile

    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "C:/Python27/Lib/site-packages/skfuzzy/control/tipping.py", line 41, in <module>

    tipping_ctrl = ctrl.ControlSystem([rule1, rule2, rule3])

  File "C:\Python27\lib\site-packages\skfuzzy\control\controlsystem.py", line 45, in __init__

    self.addrule(rule)

  File "C:\Python27\lib\site-packages\skfuzzy\control\controlsystem.py", line 98, in addrule

    for r in self.rules:

  File "C:\Python27\lib\site-packages\skfuzzy\control\controlsystem.py", line 596, in __iter__

    self._cache = list(self._process_rules(self.all_rules[:]))

  File "C:\Python27\lib\site-packages\skfuzzy\control\controlsystem.py", line 630, in _process_rules

    if self._can_calc_rule(rule):

  File "C:\Python27\lib\site-packages\skfuzzy\control\controlsystem.py", line 658, in _can_calc_rule

    for p in self.all_graph.predecessors_iter(rule):

AttributeError: 'DiGraph' object has no attribute 'predecessors_iter'

P.S.: i used

 pip install -U scikit-fuzzy for the installation

thanks

[Joshua Warner]

The first issue is fixed in master, you can safely ignore it and proceed.  If you need to visualze the Rule, you can use the development version or wait; this and another recent fix will be packaged into a minor point bugfix release soon.

The second looks like a real bug, related to NetworkX.  Can you check which version of NetworkX are you using, and open a new Issue on the project GitHub page for this?

[Emmy Guy]

Hello Josh

thanks for the earnest reply and sorry for the delay in response.

I have opened an issue on Github as you suggested; also, the version of networkx am using is networkx-2.0. i did run an update but the error still persists.

thanks.