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Add typing annotations to Python codes. (#411)
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@@ -37,9 +37,9 @@
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```python title=""
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""" 链表结点类 """
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class ListNode:
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def __init__(self, x):
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self.val = x # 结点值
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self.next = None # 指向下一结点的指针(引用)
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def __init__(self, val: int):
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self.val: int = val # 结点值
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self.next: Optional[ListNode] = None # 指向下一结点的指针(引用)
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```
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=== "Go"
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@@ -609,10 +609,10 @@
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```python title=""
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""" 双向链表结点类 """
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class ListNode:
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def __init__(self, x):
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self.val = x # 结点值
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self.next = None # 指向后继结点的指针(引用)
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self.prev = None # 指向前驱结点的指针(引用)
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def __init__(self, val: int):
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self.val: int = val # 结点值
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self.next: Optional[ListNode] = None # 指向后继结点的指针(引用)
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self.prev: Optional[ListNode] = None # 指向前驱结点的指针(引用)
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```
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=== "Go"
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