head = None

#node1 = {'name' : 'Ivan', 'phone' : '123-456', 'next' : None}
#head = node1

#node2 = {'name' : 'Dima', 'phone' : '789-123', 'next' : None}
#node1['next'] = node2

def ll_insert(head, name, phone):

    curent = head
    while curent is not None:
        if curent['name'] == name:
            curent['phone'] = phone
            return head
        curent = curent['next']


    n_node = {'name' : name, 'phone' : phone, 'next' : None}

    if head is None:
        return n_node

    curent = head
    while curent['next'] is not None:
        curent = curent['next']
    curent['next'] = n_node
    return head



ptiny("====== TESTING ll_insert FUNC ========")
head = ll_insert(head,'Ivan','123-456')

print(head)

head = ll_insert(head, 'Boris', '123-456')

print(head)

head = ll_insert(head, 'Ivan', '321-654')

print(head)

head = ll_insert(head, 'Dima', '345-678')

print(head)

head = ll_insert(head, 'Boris', '111-222')

print(head)
print("======= END TEST =======")