• for 迴圈
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for element in iterable:
    # 代碼區
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for element in iterable:
    if condition:
        break
    if condition:
        continue
else:
    # 在循環正常结束時執行的代碼
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for i in range(5):
    for j in range(3):
        print(i, j)
  • if else
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if condition:
    # 條件為真時代碼區
else:
    # 條件為假時執行的代碼區
  • 範例
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x = 5

if x > 10:
    print("x 大於 10")
else:
    print("x 不大於 10")
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x = 10

if x > 10:
    print("x 大於 10")
elif x < 10:
    print("x 小於 10")
else:
    print("x 等於 10")
  • 關於 anytree
  • 先載
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pip install anytree
  • 程式碼
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from anytree import Node, RenderTree

# 建立節點
root = Node("A")
node_b = Node("B", parent=root)
node_c = Node("C", parent=root)
Node("D", parent=node_b)
Node("E", parent=node_b)
Node("F", parent=node_c)

# 遍歷樹結構
for pre, _, node in RenderTree(root):
    print(f"{pre}{node.name}")

# 尋找節點
node_d = root.children[0].children[0]
path_to_node_d = node_d.path
print("到達節點D的路徑:", [node.name for node in path_to_node_d])

# 刪除節點
node_c.parent = None

# 重新遍歷樹結構
for pre, _, node in RenderTree(root):
    print(f"{pre}{node.name}")