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



print("====== 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)

head = ll_insert(head, 'Methody', '221-112')

head = ll_insert(head, 'Kiril', '112-221')

print(f"======= END TEST =======\n\n\n")


def ll_find(head, name):
    curent = head
    while curent is not None:
        if curent['name'] == name:
            return curent['phone']
        curent = curent['next']
    return None

print("====== TESTING ll_find FUNC ======")

print("Ivan`s phone: "+ ll_find(head, 'Ivan'))

print("Dima`s phone: "+ ll_find(head, 'Dima'))

print("Boris phone: "+ ll_find(head, 'Boris'))

print(f"====== END TEST ======\n\n\n")


def ll_delete(head, name):
    if head is None:
        return None

    if head['name'] == name:
        return head['next']

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


print("====== TEST ll_delete FUNC ======")

print("Del of Dima:", ll_delete(head, 'Dima'))

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


def ll_list_all(head):
    records = []
    curent = head
    while curent is not None:
        records.append((curent['name'],curent['phone']))
        curent = curent['next']
    records.sort(key=lambda pair: pair[0])
    return records

print(f"\n\n\n\n")

print("====== TESTING ll_list_all FUNC ======")

print(ll_list_all(head))

print("====== END ======")