MATLAB: MATLAB gives error while running a good Python code: TypeError: ‘float’ object is not iterable

error in matlabMATLABpython function call

I am trying to run an averaging code that requires a list and a single number tau. The python code runs well in Python 3.5.3 with inputs for eg. average([[12,13,14],[24,26,28]],0.5). The python code is as follows:
from math import *
def average(spike_trains,tau):
    class Delta_error:
        def __init__(self,spike_trains,tau):
            self.n=len(spike_trains)
            self.big_train=[]
            for train in spike_trains:
                self.big_train=self.big_train + train
                #print(self.big_train)
                #self.big_train.append(train)
            self.centre_train=[]
            self.tau=tau
            self.min=min(self.big_train)
            self.max=max(self.big_train)
        def add_spike(self,time):
            self.centre_train.append(time)
            
        def minimize(self):
            value=1.0
            time=self.min
            for spike in self.big_train:
                new_value=self.__call__(spike)
                if new_value<value:
                    value=new_value
                    time=spike
            return time
            
        def sort(self):
            self.centre_train.sort()
            
    delta_error=Delta_error(spike_trains,tau)
    train_length=len(delta_error.big_train)//len(spike_trains)
     
    for spike_c in range(0,train_length):
        new_spike = delta_error.minimize()
        delta_error.add_spike(new_spike)
        
    delta_error.sort()
    return delta_error.centre_train
Answer: [13, 24, 26]. In python.
When running in MATLAB running Python 3.5.3 (from pyversion)
py.average.average([[12,13,14],[24,26,28]],0.5)
I get the following vague error:
Python Error: TypeError: can only concatenate list (not "float") to list
The bolded lines have been problematic in MATLAB, but after changing the version of python running in MATLAB, I am only getting a one line error.
I need this code to work in MATLAB. What should I do? I would appreciate all tips and suggestions!

Best Answer

MATLAB needs to pass Python list and tuple data to your python class.
The followings work fine.
py.average.average(py.list({py.list({12,13,14}), py.list({24,26,28})}),0.5)
py.average.average(py.list({py.list([12,13,14]), py.list([24,26,28])}),0.5)
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