How do you create and add int/float?
def min(ls=0.0):# for i in c2:#take by 1 element a,b=srsumm(i)#summ/count c=a/b#average ls+=round(c,1) print(ls) return ls
In fact, it's necessary to record data in ls as in boxes [1.2.3] and not 1+2+3=6.
How do you make a cortege of ls and add value to it?
You need a list, not a box. Cortege is an intangible data structure, so adding elements into it is possible only through re-establishment, which is why it's rather inefficient (maybe you're just misrepresenting the list because you're giving an example of the list syntax, not cortege).
To create an empty list is easy:
lst = 
Components are added using methods
extendReplacement by operator
+=but it must be borne in mind that this method adds a list rather than one meaning:
lst.append(10) #  lst.extend([1, 2]) # [10, 1, 2] lst +=  # [10, 1, 2, 5]