#creation of list
##############################################################################
##############################################################################
empty_list = []                     #empty list
primes = [2,3,5]                    #list of integers
names = ["Karol", "Jozo"]           #list of strings
various = [1,"2","karol", [1,3]]    #list of various items of various types
matrix = [[1,2],[3,4]]              # list of lists

print("empty_list:",empty_list)
print("primes:",primes)
print("names:",names)
print("various:",various)
print("matrix:",matrix)

#more complex creation
#using range
alist = list(range(1,10,2))
print("alist:",alist)
#using append
blist = []
for i in range(10,0,-3):
    blist.append(i)
print("blist:",blist)
#slicing
original_list = [1,2,3,4]
forward_list = original_list[1:3]
backward_list = original_list[-1:-5:-1] #
print("original_list:",original_list,"forward_list:",forward_list,"backward_list:",backward_list)
print("\n\n\n")
#iterating throght elements
##############################################################################
##############################################################################
#through index
orig_list = list(range(10))

print("\n using indices:",end="")
for idx in range(len(orig_list)):
    print(orig_list[idx], end = "")

#through items
print("\n through items:",end="")
for item in [1,2,3,4]:
    print(item, end = "")

#through items - but slicing
print("\n slicing:",end="")
for item in orig_list[-1:-len(orig_list)-1:-1]:
    print(item, end="")

print("\n\n\n")
#Various operations
##############################################################################
##############################################################################

my_list = [1,2,3,1,2,2,1]
print("my_list", my_list)
print("my_list.count():", my_list.count(1))
print("my_list.index(2):", my_list.index(2))
print("my_list + my_list:", my_list + my_list)


#copy
##############################################################################
##############################################################################
import copy
a = [1,2,3]
shallowcopy1 = a
deepcopy1 = a[:]
deepcopy2 = copy.deepcopy(a)
a[1] = 0

print("shallowcopy1,deepcopy1,deepcopy2:",shallowcopy1,deepcopy1,deepcopy2)