46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
# phonebook.py
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# Узел списка: {'n': имя, 'p': телефон, 'nxt': следующий}
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def ll_insert(head, name, phone):
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# обновление, если уже есть
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curr = head
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while curr is not None:
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if curr['n'] == name:
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curr['p'] = phone
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return head
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curr = curr['nxt']
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# вставка в начало (новый узел становится головой)
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new_node = {'n': name, 'p': phone, 'nxt': head}
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return new_node
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def ll_find(head, name):
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curr = head
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while curr is not None:
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if curr['n'] == name:
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return curr['p']
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curr = curr['nxt']
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return None
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def ll_delete(head, name):
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if head is None:
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return None
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if head['n'] == name:
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return head['nxt']
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prev = head
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curr = head['nxt']
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while curr is not None:
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if curr['n'] == name:
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prev['nxt'] = curr['nxt']
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return head
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prev = curr
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curr = curr['nxt']
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return head
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def ll_list_all(head):
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records = []
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curr = head
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while curr is not None:
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records.append((curr['n'], curr['p']))
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curr = curr['nxt']
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records.sort(key=lambda x: x[0])
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return records |