Update code style for Python

codes/python/modules/linked_list.py

@@ -0,0 +1,57 @@
+"""
+File: linked_list.py
+Created Time: 2021-12-11
+Author: Krahets (krahets@163.com)
+"""
+
+class ListNode:
+    """Definition for a singly-linked list node
+    """    
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
+def list_to_linked_list(arr):
+    """Generate a linked list with a list
+
+    Args:
+        arr ([type]): [description]
+
+    Returns:
+        [type]: [description]
+    """    
+    dum = head = ListNode(0)
+    for a in arr:
+        node = ListNode(a)
+        head.next = node
+        head = head.next
+    return dum.next
+
+def linked_list_to_list(head):
+    """Serialize a linked list into an array
+
+    Args:
+        head ([type]): [description]
+
+    Returns:
+        [type]: [description]
+    """    
+    arr = []
+    while head:
+        arr.append(head.val)
+        head = head.next
+    return arr
+
+def get_list_node(head, val):
+    """Get a list node with specific value from a linked list
+
+    Args:
+        head ([type]): [description]
+        val ([type]): [description]
+
+    Returns:
+        [type]: [description]
+    """    
+    while head and head.val != val:
+        head = head.next
+    return head