{"id":562,"date":"2025-10-23T15:01:16","date_gmt":"2025-10-23T07:01:16","guid":{"rendered":"http:\/\/www.pyteam.cn\/?p=562"},"modified":"2025-10-23T15:01:16","modified_gmt":"2025-10-23T07:01:16","slug":"python3-%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.pyteam.cn\/index.php\/2025\/10\/23\/python3-%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84\/","title":{"rendered":"Python3 \u6570\u636e\u7ed3\u6784"},"content":{"rendered":"\n

\u672c\u7ae0\u8282\u6211\u4eec\u4e3b\u8981\u7ed3\u5408\u524d\u9762\u6240\u5b66\u7684\u77e5\u8bc6\u70b9\u6765\u4ecb\u7ecdPython\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n

\u5217\u8868<\/h2>\n\n\n\n

Python\u4e2d\u5217\u8868\u662f\u53ef\u53d8\u7684\uff0c\u8fd9\u662f\u5b83\u533a\u522b\u4e8e\u5b57\u7b26\u4e32\u548c\u5143\u7ec4\u7684\u6700\u91cd\u8981\u7684\u7279\u70b9\uff0c\u4e00\u53e5\u8bdd\u6982\u62ec\u5373\uff1a\u5217\u8868\u53ef\u4ee5\u4fee\u6539\uff0c\u800c\u5b57\u7b26\u4e32\u548c\u5143\u7ec4\u4e0d\u80fd\u3002<\/p>\n\n\n\n

\u4ee5\u4e0b\u662f Python \u4e2d\u5217\u8868\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

\u65b9\u6cd5<\/th>\u63cf\u8ff0<\/th><\/tr>
list.append(x)<\/td>\u628a\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u7684\u7ed3\u5c3e\uff0c\u76f8\u5f53\u4e8e a[len(a):] = [x]\u3002<\/td><\/tr>
list.extend(L)<\/td>\u901a\u8fc7\u6dfb\u52a0\u6307\u5b9a\u5217\u8868\u7684\u6240\u6709\u5143\u7d20\u6765\u6269\u5145\u5217\u8868\uff0c\u76f8\u5f53\u4e8e a[len(a):] = L\u3002<\/td><\/tr>
list.insert(i, x)<\/td>\u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u4e00\u4e2a\u5143\u7d20\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u51c6\u5907\u63d2\u5165\u5230\u5176\u524d\u9762\u7684\u90a3\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\uff0c\u4f8b\u5982 a.insert(0, x) \u4f1a\u63d2\u5165\u5230\u6574\u4e2a\u5217\u8868\u4e4b\u524d\uff0c\u800c a.insert(len(a), x) \u76f8\u5f53\u4e8e a.append(x) \u3002<\/td><\/tr>
list.remove(x)<\/td>\u5220\u9664\u5217\u8868\u4e2d\u503c\u4e3a x \u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002\u5982\u679c\u6ca1\u6709\u8fd9\u6837\u7684\u5143\u7d20\uff0c\u5c31\u4f1a\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u3002<\/td><\/tr>
list.pop([i])<\/td>\u4ece\u5217\u8868\u7684\u6307\u5b9a\u4f4d\u7f6e\u79fb\u9664\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u8fd4\u56de\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u7d22\u5f15\uff0ca.pop()\u8fd4\u56de\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002\u5143\u7d20\u968f\u5373\u4ece\u5217\u8868\u4e2d\u88ab\u79fb\u9664\u3002\uff08\u65b9\u6cd5\u4e2d i \u4e24\u8fb9\u7684\u65b9\u62ec\u53f7\u8868\u793a\u8fd9\u4e2a\u53c2\u6570\u662f\u53ef\u9009\u7684\uff0c\u800c\u4e0d\u662f\u8981\u6c42\u4f60\u8f93\u5165\u4e00\u5bf9\u65b9\u62ec\u53f7\uff0c\u4f60\u4f1a\u7ecf\u5e38\u5728 Python \u5e93\u53c2\u8003\u624b\u518c\u4e2d\u9047\u5230\u8fd9\u6837\u7684\u6807\u8bb0\u3002\uff09<\/td><\/tr>
list.clear()<\/td>\u79fb\u9664\u5217\u8868\u4e2d\u7684\u6240\u6709\u9879\uff0c\u7b49\u4e8edel a[:]\u3002<\/td><\/tr>
list.index(x)<\/td>\u8fd4\u56de\u5217\u8868\u4e2d\u7b2c\u4e00\u4e2a\u503c\u4e3a x \u7684\u5143\u7d20\u7684\u7d22\u5f15\u3002\u5982\u679c\u6ca1\u6709\u5339\u914d\u7684\u5143\u7d20\u5c31\u4f1a\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\u3002<\/td><\/tr>
list.count(x)<\/td>\u8fd4\u56de x \u5728\u5217\u8868\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/td><\/tr>
list.sort()<\/td>\u5bf9\u5217\u8868\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002<\/td><\/tr>
list.reverse()<\/td>\u5012\u6392\u5217\u8868\u4e2d\u7684\u5143\u7d20\u3002<\/td><\/tr>
list.copy()<\/td>\u8fd4\u56de\u5217\u8868\u7684\u6d45\u590d\u5236\uff0c\u7b49\u4e8ea[:]\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4e0b\u9762\u793a\u4f8b\u6f14\u793a\u4e86\u5217\u8868\u7684\u5927\u90e8\u5206\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

\u5b9e\u4f8b<\/h2>\n\n\n\n

>>> a = [66.25, 333, 333, 1, 1234.5]
>>> print<\/strong>(a.count(333), a.count(66.25), a.count(‘x’))
2 1 0
>>> a.insert(2, -1)
>>> a.append(333)
>>> a
[66.25, 333, -1, 333, 1, 1234.5, 333]
>>> a.index(333)
1
>>> a.remove(333)
>>> a
[66.25, -1, 333, 1, 1234.5, 333]
>>> a.reverse()
>>> a
[333, 1234.5, 1, 333, -1, 66.25]
>>> a.sort()
>>> a
[-1, 1, 66.25, 333, 333, 1234.5]<\/p>\n\n\n\n

\u6ce8\u610f\uff1a\u7c7b\u4f3c insert, remove \u6216 sort \u7b49\u4fee\u6539\u5217\u8868\u7684\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n

\u5c06\u5217\u8868\u5f53\u505a\u6808\u4f7f\u7528<\/h2>\n\n\n\n

\u5728 Python \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\uff08list\uff09\u6765\u5b9e\u73b0\u6808\u7684\u529f\u80fd\u3002\u6808\u662f\u4e00\u79cd\u540e\u8fdb\u5148\u51fa\uff08LIFO, Last-In-First-Out\uff09\u6570\u636e\u7ed3\u6784\uff0c\u610f\u5473\u7740\u6700\u540e\u6dfb\u52a0\u7684\u5143\u7d20\u6700\u5148\u88ab\u79fb\u9664\u3002\u5217\u8868\u63d0\u4f9b\u4e86\u4e00\u4e9b\u65b9\u6cd5\uff0c\u4f7f\u5176\u975e\u5e38\u9002\u5408\u7528\u4e8e\u6808\u64cd\u4f5c\uff0c\u7279\u522b\u662f append()<\/strong> \u548c pop()<\/strong> \u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u7528 append() \u65b9\u6cd5\u53ef\u4ee5\u628a\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u6808\u9876\uff0c\u7528\u4e0d\u6307\u5b9a\u7d22\u5f15\u7684 pop() \u65b9\u6cd5\u53ef\u4ee5\u628a\u4e00\u4e2a\u5143\u7d20\u4ece\u6808\u9876\u91ca\u653e\u51fa\u6765\u3002<\/p>\n\n\n\n

\u6808\u64cd\u4f5c<\/h3>\n\n\n\n
    \n
  • \u538b\u5165\uff08Push\uff09<\/strong>: \u5c06\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u6808\u7684\u9876\u7aef\u3002<\/li>\n\n\n\n
  • \u5f39\u51fa\uff08Pop\uff09<\/strong>: \u79fb\u9664\u5e76\u8fd4\u56de\u6808\u9876\u5143\u7d20\u3002<\/li>\n\n\n\n
  • \u67e5\u770b\u6808\u9876\u5143\u7d20\uff08Peek\/Top\uff09<\/strong>: \u8fd4\u56de\u6808\u9876\u5143\u7d20\u800c\u4e0d\u79fb\u9664\u5b83\u3002<\/li>\n\n\n\n
  • \u68c0\u67e5\u662f\u5426\u4e3a\u7a7a\uff08IsEmpty\uff09<\/strong>: \u68c0\u67e5\u6808\u662f\u5426\u4e3a\u7a7a\u3002<\/li>\n\n\n\n
  • \u83b7\u53d6\u6808\u7684\u5927\u5c0f\uff08Size\uff09<\/strong>: \u83b7\u53d6\u6808\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n

    \u4ee5\u4e0b\u662f\u5982\u4f55\u5728 Python \u4e2d\u4f7f\u7528\u5217\u8868\u5b9e\u73b0\u8fd9\u4e9b\u64cd\u4f5c\u7684\u8be6\u7ec6\u8bf4\u660e\uff1a<\/p>\n\n\n\n

    1\u3001\u521b\u5efa\u4e00\u4e2a\u7a7a\u6808<\/h3>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    stack = []<\/p>\n\n\n\n

    2\u3001\u538b\u5165\uff08Push\uff09\u64cd\u4f5c<\/h3>\n\n\n\n

    \u4f7f\u7528 append() \u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6808\u7684\u9876\u7aef\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    stack.append(1)
    stack.append(2)
    stack.append(3)
    print<\/strong>(stack) # \u8f93\u51fa: [1, 2, 3]<\/p>\n\n\n\n

    3\u3001\u5f39\u51fa\uff08Pop\uff09\u64cd\u4f5c<\/h3>\n\n\n\n

    \u4f7f\u7528 pop() \u65b9\u6cd5\u79fb\u9664\u5e76\u8fd4\u56de\u6808\u9876\u5143\u7d20\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    top_element = stack.pop()
    print<\/strong>(top_element) # \u8f93\u51fa: 3
    print<\/strong>(stack) # \u8f93\u51fa: [1, 2]<\/p>\n\n\n\n

    4\u3001\u67e5\u770b\u6808\u9876\u5143\u7d20\uff08Peek\/Top\uff09<\/h3>\n\n\n\n

    \u76f4\u63a5\u8bbf\u95ee\u5217\u8868\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff08\u4e0d\u79fb\u9664\uff09\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    top_element = stack[-1]
    print<\/strong>(top_element) # \u8f93\u51fa: 2<\/p>\n\n\n\n

    5\u3001\u68c0\u67e5\u662f\u5426\u4e3a\u7a7a\uff08IsEmpty\uff09<\/h3>\n\n\n\n

    \u68c0\u67e5\u5217\u8868\u662f\u5426\u4e3a\u7a7a\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    is_empty = len(stack) == 0
    print<\/strong>(is_empty) # \u8f93\u51fa: False<\/p>\n\n\n\n

    6\u3001\u83b7\u53d6\u6808\u7684\u5927\u5c0f\uff08Size\uff09<\/h3>\n\n\n\n

    \u4f7f\u7528 len() \u51fd\u6570\u83b7\u53d6\u6808\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    size = len(stack)
    print<\/strong>(size) # \u8f93\u51fa: 2<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h3>\n\n\n\n

    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u5b9e\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u4e0a\u8ff0\u64cd\u4f5c\u6765\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u6808\uff1a<\/p>\n\n\n\n

    \u5b9e\u4f8b<\/h2>\n\n\n\n

    class<\/strong> Stack:
     def<\/strong> __init__(self):
     self.stack = []<\/p>\n\n\n\n

     def<\/strong> push(self, item):
     self.stack.append(item)<\/p>\n\n\n\n

     def<\/strong> pop(self):
     if<\/strong> not<\/strong> self.is_empty():
     return<\/strong> self.stack.pop()
     else<\/strong>:
     raise<\/strong> IndexError(“pop from empty stack”)<\/p>\n\n\n\n

     def<\/strong> peek(self):
     if<\/strong> not<\/strong> self.is_empty():
     return<\/strong> self.stack[-1]
     else<\/strong>:
     raise<\/strong> IndexError(“peek from empty stack”)<\/p>\n\n\n\n

     def<\/strong> is_empty(self):
     return<\/strong> len(self.stack) == 0<\/p>\n\n\n\n

     def<\/strong> size(self):
     return<\/strong> len(self.stack)<\/p>\n\n\n\n

    # \u4f7f\u7528\u793a\u4f8b
    stack = Stack()
    stack.push(1)
    stack.push(2)
    stack.push(3)<\/p>\n\n\n\n

    print<\/strong>(“\u6808\u9876\u5143\u7d20:”, stack.peek()) # \u8f93\u51fa: \u6808\u9876\u5143\u7d20: 3
    print<\/strong>(“\u6808\u5927\u5c0f:”, stack.size()) # \u8f93\u51fa: \u6808\u5927\u5c0f: 3<\/p>\n\n\n\n

    print<\/strong>(“\u5f39\u51fa\u5143\u7d20:”, stack.pop()) # \u8f93\u51fa: \u5f39\u51fa\u5143\u7d20: 3
    print<\/strong>(“\u6808\u662f\u5426\u4e3a\u7a7a:”, stack.is_empty()) # \u8f93\u51fa: \u6808\u662f\u5426\u4e3a\u7a7a: False
    print<\/strong>(“\u6808\u5927\u5c0f:”, stack.size()) # \u8f93\u51fa: \u6808\u5927\u5c0f: 2<\/p>\n\n\n\n

    \u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a Stack \u7c7b\uff0c\u5c01\u88c5\u4e86\u5217\u8868\u4f5c\u4e3a\u5e95\u5c42\u6570\u636e\u7ed3\u6784\uff0c\u5e76\u5b9e\u73b0\u4e86\u6808\u7684\u57fa\u672c\u64cd\u4f5c\u3002<\/p>\n\n\n\n

    \u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    \u6808\u9876\u5143\u7d20: 3\n\u6808\u5927\u5c0f: 3\n\u5f39\u51fa\u5143\u7d20: 3\n\u6808\u662f\u5426\u4e3a\u7a7a: False\n\u6808\u5927\u5c0f: 2<\/pre>\n\n\n\n
    \u5c06\u5217\u8868\u5f53\u4f5c\u961f\u5217\u4f7f\u7528<\/h2>\n\n\n\n
    \u5728 Python \u4e2d\uff0c\u5217\u8868\uff08list\uff09\u53ef\u4ee5\u7528\u4f5c\u961f\u5217\uff08queue\uff09\uff0c\u4f46\u7531\u4e8e\u5217\u8868\u7684\u7279\u70b9\uff0c\u76f4\u63a5\u4f7f\u7528\u5217\u8868\u6765\u5b9e\u73b0\u961f\u5217\u5e76\u4e0d\u662f\u6700\u4f18\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n
    \u961f\u5217\u662f\u4e00\u79cd\u5148\u8fdb\u5148\u51fa\uff08FIFO, First-In-First-Out\uff09\u7684\u6570\u636e\u7ed3\u6784\uff0c\u610f\u5473\u7740\u6700\u65e9\u6dfb\u52a0\u7684\u5143\u7d20\u6700\u5148\u88ab\u79fb\u9664\u3002<\/p>\n\n\n\n
    \u4f7f\u7528\u5217\u8868\u65f6\uff0c\u5982\u679c\u9891\u7e41\u5730\u5728\u5217\u8868\u7684\u5f00\u5934\u63d2\u5165\u6216\u5220\u9664\u5143\u7d20\uff0c\u6027\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u64cd\u4f5c\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662f O(n)\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cPython \u63d0\u4f9b\u4e86 collections.deque\uff0c\u5b83\u662f\u53cc\u7aef\u961f\u5217\uff0c\u53ef\u4ee5\u5728\u4e24\u7aef\u9ad8\u6548\u5730\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002<\/p>\n\n\n\n
    \u4f7f\u7528 collections.deque \u5b9e\u73b0\u961f\u5217<\/h3>\n\n\n\n
    collections.deque \u662f Python \u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff0c\u975e\u5e38\u9002\u5408\u7528\u4e8e\u5b9e\u73b0\u961f\u5217\u3002<\/p>\n\n\n\n
    \u4ee5\u4e0b\u662f\u4f7f\u7528 deque \u5b9e\u73b0\u961f\u5217\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    from<\/strong> collections import<\/strong> deque<\/p>\n\n\n\n
    # \u521b\u5efa\u4e00\u4e2a\u7a7a\u961f\u5217
    queue = deque()<\/p>\n\n\n\n
    # \u5411\u961f\u5c3e\u6dfb\u52a0\u5143\u7d20
    queue.append(‘a’)
    queue.append(‘b’)
    queue.append(‘c’)<\/p>\n\n\n\n
    print<\/strong>(“\u961f\u5217\u72b6\u6001:”, queue) # \u8f93\u51fa: \u961f\u5217\u72b6\u6001: deque([‘a’, ‘b’, ‘c’])<\/p>\n\n\n\n
    # \u4ece\u961f\u9996\u79fb\u9664\u5143\u7d20
    first_element = queue.popleft()
    print<\/strong>(“\u79fb\u9664\u7684\u5143\u7d20:”, first_element) # \u8f93\u51fa: \u79fb\u9664\u7684\u5143\u7d20: a
    print<\/strong>(“\u961f\u5217\u72b6\u6001:”, queue) # \u8f93\u51fa: \u961f\u5217\u72b6\u6001: deque([‘b’, ‘c’])<\/p>\n\n\n\n
    # \u67e5\u770b\u961f\u9996\u5143\u7d20\uff08\u4e0d\u79fb\u9664\uff09
    front_element = queue[0]
    print<\/strong>(“\u961f\u9996\u5143\u7d20:”, front_element) # \u8f93\u51fa: \u961f\u9996\u5143\u7d20: b<\/p>\n\n\n\n
    # \u68c0\u67e5\u961f\u5217\u662f\u5426\u4e3a\u7a7a
    is_empty = len(queue) == 0
    print<\/strong>(“\u961f\u5217\u662f\u5426\u4e3a\u7a7a:”, is_empty)  # \u8f93\u51fa: \u961f\u5217\u662f\u5426\u4e3a\u7a7a: False<\/p>\n\n\n\n
    # \u83b7\u53d6\u961f\u5217\u5927\u5c0f
    size = len(queue)
    print<\/strong>(“\u961f\u5217\u5927\u5c0f:”, size) # \u8f93\u51fa: \u961f\u5217\u5927\u5c0f: 2
    “`<\/p>\n\n\n\n
    \u4f7f\u7528\u5217\u8868\u5b9e\u73b0\u961f\u5217<\/h3>\n\n\n\n
    \u867d\u7136 deque\u66f4\u9ad8\u6548\uff0c\u4f46\u5982\u679c\u575a\u6301\u4f7f\u7528\u5217\u8868\u6765\u5b9e\u73b0\u961f\u5217\uff0c\u4e5f\u53ef\u4ee5\u8fd9\u4e48\u505a\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5217\u8868\u5b9e\u73b0\u961f\u5217\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
    1. \u521b\u5efa\u961f\u5217<\/strong><\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    queue = []<\/p>\n\n\n\n
    2. \u5411\u961f\u5c3e\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n\n\n\n
    \u4f7f\u7528 append() \u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u961f\u5c3e\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    queue.append(‘a’)
    queue.append(‘b’)
    queue.append(‘c’)
    print<\/strong>(“\u961f\u5217\u72b6\u6001:”, queue) # \u8f93\u51fa: \u961f\u5217\u72b6\u6001: [‘a’, ‘b’, ‘c’]<\/p>\n\n\n\n
    3. \u4ece\u961f\u9996\u79fb\u9664\u5143\u7d20<\/strong><\/p>\n\n\n\n
    \u4f7f\u7528 pop(0) \u65b9\u6cd5\u4ece\u961f\u9996\u79fb\u9664\u5143\u7d20\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    first_element = queue.pop(0)
    print<\/strong>(“\u79fb\u9664\u7684\u5143\u7d20:”, first_element) # \u8f93\u51fa: \u79fb\u9664\u7684\u5143\u7d20: a
    print<\/strong>(“\u961f\u5217\u72b6\u6001:”, queue) # \u8f93\u51fa: \u961f\u5217\u72b6\u6001: [‘b’, ‘c’]<\/p>\n\n\n\n
    4. \u67e5\u770b\u961f\u9996\u5143\u7d20\uff08\u4e0d\u79fb\u9664\uff09<\/strong><\/p>\n\n\n\n
    \u76f4\u63a5\u8bbf\u95ee\u5217\u8868\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    front_element = queue[0]
    print<\/strong>(“\u961f\u9996\u5143\u7d20:”, front_element) # \u8f93\u51fa: \u961f\u9996\u5143\u7d20: b<\/p>\n\n\n\n
    5. \u68c0\u67e5\u961f\u5217\u662f\u5426\u4e3a\u7a7a<\/strong><\/p>\n\n\n\n
    \u68c0\u67e5\u5217\u8868\u662f\u5426\u4e3a\u7a7a\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    is_empty = len(queue) == 0
    print<\/strong>(“\u961f\u5217\u662f\u5426\u4e3a\u7a7a:”, is_empty)  # \u8f93\u51fa: \u961f\u5217\u662f\u5426\u4e3a\u7a7a: False<\/p>\n\n\n\n
    6. \u83b7\u53d6\u961f\u5217\u5927\u5c0f<\/strong><\/p>\n\n\n\n
    \u4f7f\u7528 len() \u51fd\u6570\u83b7\u53d6\u961f\u5217\u7684\u5927\u5c0f\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    size = len(queue)
    print<\/strong>(“\u961f\u5217\u5927\u5c0f:”, size) # \u8f93\u51fa: \u961f\u5217\u5927\u5c0f: 2<\/p>\n\n\n\n
    \u5b9e\u4f8b\uff08\u4f7f\u7528\u5217\u8868\u5b9e\u73b0\u961f\u5217\uff09<\/h3>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    class<\/strong> Queue:
     def<\/strong> __init__(self):
     self.queue = []<\/p>\n\n\n\n
     def<\/strong> enqueue(self, item):
     self.queue.append(item)<\/p>\n\n\n\n
     def<\/strong> dequeue(self):
     if<\/strong> not<\/strong> self.is_empty():
     return<\/strong> self.queue.pop(0)
     else<\/strong>:
     raise<\/strong> IndexError(“dequeue from empty queue”)<\/p>\n\n\n\n
     def<\/strong> peek(self):
     if<\/strong> not<\/strong> self.is_empty():
     return<\/strong> self.queue[0]
     else<\/strong>:
     raise<\/strong> IndexError(“peek from empty queue”)<\/p>\n\n\n\n
     def<\/strong> is_empty(self):
     return<\/strong> len(self.queue) == 0<\/p>\n\n\n\n
     def<\/strong> size(self):
     return<\/strong> len(self.queue)<\/p>\n\n\n\n
    # \u4f7f\u7528\u793a\u4f8b
    queue = Queue()
    queue.enqueue(‘a’)
    queue.enqueue(‘b’)
    queue.enqueue(‘c’)<\/p>\n\n\n\n
    print<\/strong>(“\u961f\u9996\u5143\u7d20:”, queue.peek()) # \u8f93\u51fa: \u961f\u9996\u5143\u7d20: a
    print<\/strong>(“\u961f\u5217\u5927\u5c0f:”, queue.size()) # \u8f93\u51fa: \u961f\u5217\u5927\u5c0f: 3<\/p>\n\n\n\n
    print<\/strong>(“\u79fb\u9664\u7684\u5143\u7d20:”, queue.dequeue()) # \u8f93\u51fa: \u79fb\u9664\u7684\u5143\u7d20: a
    print<\/strong>(“\u961f\u5217\u662f\u5426\u4e3a\u7a7a:”, queue.is_empty()) # \u8f93\u51fa: \u961f\u5217\u662f\u5426\u4e3a\u7a7a: False
    print<\/strong>(“\u961f\u5217\u5927\u5c0f:”, queue.size()) # \u8f93\u51fa: \u961f\u5217\u5927\u5c0f: 2<\/p>\n\n\n\n
    \u867d\u7136\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u6765\u5b9e\u73b0\u961f\u5217\uff0c\u4f46\u4f7f\u7528 collections.deque \u4f1a\u66f4\u9ad8\u6548\u548c\u7b80\u6d01\u3002\u5b83\u63d0\u4f9b\u4e86 O(1) \u65f6\u95f4\u590d\u6742\u5ea6\u7684\u6dfb\u52a0\u548c\u5220\u9664\u64cd\u4f5c\uff0c\u975e\u5e38\u9002\u5408\u961f\u5217\u8fd9\u79cd\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n
    \u5217\u8868\u63a8\u5bfc\u5f0f<\/h2>\n\n\n\n
    \u5217\u8868\u63a8\u5bfc\u5f0f\u63d0\u4f9b\u4e86\u4ece\u5e8f\u5217\u521b\u5efa\u5217\u8868\u7684\u7b80\u5355\u9014\u5f84\u3002\u901a\u5e38\u5e94\u7528\u7a0b\u5e8f\u5c06\u4e00\u4e9b\u64cd\u4f5c\u5e94\u7528\u4e8e\u67d0\u4e2a\u5e8f\u5217\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u7528\u5176\u83b7\u5f97\u7684\u7ed3\u679c\u4f5c\u4e3a\u751f\u6210\u65b0\u5217\u8868\u7684\u5143\u7d20\uff0c\u6216\u8005\u6839\u636e\u786e\u5b9a\u7684\u5224\u5b9a\u6761\u4ef6\u521b\u5efa\u5b50\u5e8f\u5217\u3002<\/p>\n\n\n\n
    \u6bcf\u4e2a\u5217\u8868\u63a8\u5bfc\u5f0f\u90fd\u5728 for \u4e4b\u540e\u8ddf\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff0c\u7136\u540e\u6709\u96f6\u5230\u591a\u4e2a for \u6216 if \u5b50\u53e5\u3002\u8fd4\u56de\u7ed3\u679c\u662f\u4e00\u4e2a\u6839\u636e\u8868\u8fbe\u4ece\u5176\u540e\u7684 for \u548c if \u4e0a\u4e0b\u6587\u73af\u5883\u4e2d\u751f\u6210\u51fa\u6765\u7684\u5217\u8868\u3002\u5982\u679c\u5e0c\u671b\u8868\u8fbe\u5f0f\u63a8\u5bfc\u51fa\u4e00\u4e2a\u5143\u7ec4\uff0c\u5c31\u5fc5\u987b\u4f7f\u7528\u62ec\u53f7\u3002<\/p>\n\n\n\n
    \u8fd9\u91cc\u6211\u4eec\u5c06\u5217\u8868\u4e2d\u6bcf\u4e2a\u6570\u503c\u4e58\u4e09\uff0c\u83b7\u5f97\u4e00\u4e2a\u65b0\u7684\u5217\u8868\uff1a<\/p>\n\n\n\n
    >>> vec = [2, 4, 6]
    >>> [3*x for<\/strong> x in<\/strong> vec]
    [6, 12, 18]<\/p>\n\n\n\n
    \u73b0\u5728\u6211\u4eec\u73a9\u4e00\u70b9\u5c0f\u82b1\u6837\uff1a<\/p>\n\n\n\n
    >>> [[x, x**2] for<\/strong> x in<\/strong> vec]
    [[2, 4], [4, 16], [6, 36]]<\/p>\n\n\n\n
    \u8fd9\u91cc\u6211\u4eec\u5bf9\u5e8f\u5217\u91cc\u6bcf\u4e00\u4e2a\u5143\u7d20\u9010\u4e2a\u8c03\u7528\u67d0\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
    \u5b9e\u4f8b<\/h2>\n\n\n\n
    >>> freshfruit = [‘  banana’, ‘  loganberry ‘, ‘passion fruit  ‘]
    >>> [weapon.strip() for<\/strong> weapon in<\/strong> freshfruit]
    [‘banana’, ‘loganberry’, ‘passion fruit’]<\/p>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u7528 if \u5b50\u53e5\u4f5c\u4e3a\u8fc7\u6ee4\u5668\uff1a<\/p>\n\n\n\n
    >>> [3*x for<\/strong> x in<\/strong> vec if<\/strong> x > 3]
    [12, 18]
    >>> [3*x for<\/strong> x in<\/strong> vec if<\/strong> x < 2]
    []<\/p>\n\n\n\n
    \u4ee5\u4e0b\u662f\u4e00\u4e9b\u5173\u4e8e\u5faa\u73af\u548c\u5176\u5b83\u6280\u5de7\u7684\u6f14\u793a\uff1a<\/p>\n\n\n\n
    >>> vec1 = [2, 4, 6]
    >>> vec2 = [4, 3, -9]
    >>> [x*y for<\/strong> x in<\/strong> vec1 for<\/strong> y in<\/strong> vec2]
    [8, 6, -18, 16, 12, -36, 24, 18, -54]
    >>> [x+y for<\/strong> x in<\/strong> vec1 for<\/strong> y in<\/strong> vec2]
    [6, 5, -7, 8, 7, -5, 10, 9, -3]
    >>> [vec1[i]*vec2[i] for<\/strong> i in<\/strong> range(len(vec1))]
    [8, 12, -54]<\/p>\n\n\n\n
    \u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u4f7f\u7528\u590d\u6742\u8868\u8fbe\u5f0f\u6216\u5d4c\u5957\u51fd\u6570\uff1a<\/p>\n\n\n\n
    >>> [str(round(355\/113, i)) for<\/strong> i in<\/strong> range(1, 6)]
    [‘3.1’, ‘3.14’, ‘3.142’, ‘3.1416’, ‘3.14159’]<\/p>\n\n\n\n
    \u5d4c\u5957\u5217\u8868\u89e3\u6790<\/h2>\n\n\n\n
    Python\u7684\u5217\u8868\u8fd8\u53ef\u4ee5\u5d4c\u5957\u3002<\/p>\n\n\n\n
    \u4ee5\u4e0b\u5b9e\u4f8b\u5c55\u793a\u4e863X4\u7684\u77e9\u9635\u5217\u8868\uff1a<\/p>\n\n\n\n
    >>> matrix = [
    …     [1, 2, 3, 4],
    …     [5, 6, 7, 8],
    …     [9, 10, 11, 12],
    … ]<\/p>\n\n\n\n
    \u4ee5\u4e0b\u5b9e\u4f8b\u5c063X4\u7684\u77e9\u9635\u5217\u8868\u8f6c\u6362\u4e3a4X3\u5217\u8868\uff1a<\/p>\n\n\n\n
    >>> [[row[i] for<\/strong> row in<\/strong> matrix] for<\/strong> i in<\/strong> range(4)]
    [[1, 5, 9], [2, 6, 10], [3, 7, 11], [4, 8, 12]]<\/p>\n\n\n\n
    \u4ee5\u4e0a\u5b9e\u4f8b\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6765\u5b9e\u73b0\uff1a<\/p>\n\n\n\n
    >>> transposed = []
    >>> for<\/strong> i in<\/strong> range(4):
    …     transposed.append([row[i] for<\/strong> row in<\/strong> matrix])
    …
    >>> transposed
    [[1, 5, 9], [2, 6, 10], [3, 7, 11], [4, 8, 12]]<\/p>\n\n\n\n
    \u53e6\u5916\u4e00\u79cd\u5b9e\u73b0\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
    >>> transposed = []
    >>> for<\/strong> i in<\/strong> range(4):
    …     # the following 3 lines implement the nested listcomp
    …     transposed_row = []
    …     for<\/strong> row in<\/strong> matrix:
    …         transposed_row.append(row[i])
    …     transposed.append(transposed_row)
    …
    >>> transposed
    [[1, 5, 9], [2, 6, 10], [3, 7, 11], [4, 8, 12]]<\/p>\n\n\n\n
    \n\n\n\n
    del \u8bed\u53e5<\/h2>\n\n\n\n
    \u4f7f\u7528 del \u8bed\u53e5\u53ef\u4ee5\u4ece\u4e00\u4e2a\u5217\u8868\u4e2d\u6839\u636e\u7d22\u5f15\u6765\u5220\u9664\u4e00\u4e2a\u5143\u7d20\uff0c\u800c\u4e0d\u662f\u503c\u6765\u5220\u9664\u5143\u7d20\u3002\u8fd9\u4e0e\u4f7f\u7528 pop() \u8fd4\u56de\u4e00\u4e2a\u503c\u4e0d\u540c\u3002\u53ef\u4ee5\u7528 del \u8bed\u53e5\u4ece\u5217\u8868\u4e2d\u5220\u9664\u4e00\u4e2a\u5207\u5272\uff0c\u6216\u6e05\u7a7a\u6574\u4e2a\u5217\u8868\uff08\u6211\u4eec\u4ee5\u524d\u4ecb\u7ecd\u7684\u65b9\u6cd5\u662f\u7ed9\u8be5\u5207\u5272\u8d4b\u4e00\u4e2a\u7a7a\u5217\u8868\uff09\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    >>> a = [-1, 1, 66.25, 333, 333, 1234.5]
    >>> del<\/strong> a[0]
    >>> a
    [1, 66.25, 333, 333, 1234.5]
    >>> del<\/strong> a[2:4]
    >>> a
    [1, 66.25, 1234.5]
    >>> del<\/strong> a[:]
    >>> a
    []<\/p>\n\n\n\n
    \u4e5f\u53ef\u4ee5\u7528 del \u5220\u9664\u5b9e\u4f53\u53d8\u91cf\uff1a<\/p>\n\n\n\n
    >>> del a<\/pre>\n\n\n\n
    \n\n\n\n
    \u5143\u7ec4\u548c\u5e8f\u5217<\/h2>\n\n\n\n
    \u5143\u7ec4\u7531\u82e5\u5e72\u9017\u53f7\u5206\u9694\u7684\u503c\u7ec4\u6210\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
    >>> t = 12345, 54321, ‘hello!’
    >>> t[0]
    12345
    >>> t
    (12345, 54321, ‘hello!’)
    >>> # Tuples may be nested:
    … u = t, (1, 2, 3, 4, 5)
    >>> u
    ((12345, 54321, ‘hello!’), (1, 2, 3, 4, 5))<\/p>\n\n\n\n
    \u5982\u4f60\u6240\u89c1\uff0c\u5143\u7ec4\u5728\u8f93\u51fa\u65f6\u603b\u662f\u6709\u62ec\u53f7\u7684\uff0c\u4ee5\u4fbf\u4e8e\u6b63\u786e\u8868\u8fbe\u5d4c\u5957\u7ed3\u6784\u3002\u5728\u8f93\u5165\u65f6\u53ef\u80fd\u6709\u6216\u6ca1\u6709\u62ec\u53f7\uff0c \u4e0d\u8fc7\u62ec\u53f7\u901a\u5e38\u662f\u5fc5\u987b\u7684\uff08\u5982\u679c\u5143\u7ec4\u662f\u66f4\u5927\u7684\u8868\u8fbe\u5f0f\u7684\u4e00\u90e8\u5206\uff09\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u96c6\u5408<\/h2>\n\n\n\n
    \u96c6\u5408\u662f\u4e00\u4e2a\u65e0\u5e8f\u4e0d\u91cd\u590d\u5143\u7d20\u7684\u96c6\u3002\u57fa\u672c\u529f\u80fd\u5305\u62ec\u5173\u7cfb\u6d4b\u8bd5\u548c\u6d88\u9664\u91cd\u590d\u5143\u7d20\u3002<\/p>\n\n\n\n
    \u53ef\u4ee5\u7528\u5927\u62ec\u53f7({})\u521b\u5efa\u96c6\u5408\u3002\u6ce8\u610f\uff1a\u5982\u679c\u8981\u521b\u5efa\u4e00\u4e2a\u7a7a\u96c6\u5408\uff0c\u4f60\u5fc5\u987b\u7528 set() \u800c\u4e0d\u662f {} \uff1b\u540e\u8005\u521b\u5efa\u4e00\u4e2a\u7a7a\u7684\u5b57\u5178\uff0c\u4e0b\u4e00\u8282\u6211\u4eec\u4f1a\u4ecb\u7ecd\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6f14\u793a\uff1a<\/p>\n\n\n\n
    >>> basket = {‘apple’, ‘orange’, ‘apple’, ‘pear’, ‘orange’, ‘banana’}
    >>> print<\/strong>(basket) # \u5220\u9664\u91cd\u590d\u7684
    {‘orange’, ‘banana’, ‘pear’, ‘apple’}
    >>> ‘orange’ in<\/strong> basket                 # \u68c0\u6d4b\u6210\u5458
    True
    >>> ‘crabgrass’ in<\/strong> basket
    False<\/p>\n\n\n\n
    >>> # \u4ee5\u4e0b\u6f14\u793a\u4e86\u4e24\u4e2a\u96c6\u5408\u7684\u64cd\u4f5c
    …
    >>> a = set(‘abracadabra’)
    >>> b = set(‘alacazam’)
    >>> a                                  # a \u4e2d\u552f\u4e00\u7684\u5b57\u6bcd
    {‘a’, ‘r’, ‘b’, ‘c’, ‘d’}
    >>> a – b                              # \u5728 a \u4e2d\u7684\u5b57\u6bcd\uff0c\u4f46\u4e0d\u5728 b \u4e2d
    {‘r’, ‘d’, ‘b’}
    >>> a | b                              # \u5728 a \u6216 b \u4e2d\u7684\u5b57\u6bcd
    {‘a’, ‘c’, ‘r’, ‘d’, ‘b’, ‘m’, ‘z’, ‘l’}
    >>> a & b                              # \u5728 a \u548c b \u4e2d\u90fd\u6709\u7684\u5b57\u6bcd
    {‘a’, ‘c’}
    >>> a ^ b                              # \u5728 a \u6216 b \u4e2d\u7684\u5b57\u6bcd\uff0c\u4f46\u4e0d\u540c\u65f6\u5728 a \u548c b \u4e2d
    {‘r’, ‘d’, ‘b’, ‘m’, ‘z’, ‘l’}<\/p>\n\n\n\n
    \u96c6\u5408\u4e5f\u652f\u6301\u63a8\u5bfc\u5f0f\uff1a<\/p>\n\n\n\n
    >>> a = {x for<\/strong> x in<\/strong> ‘abracadabra’ if<\/strong> x not<\/strong> in<\/strong> ‘abc’}
    >>> a
    {‘r’, ‘d’}<\/p>\n\n\n\n
    \n\n\n\n
    \u5b57\u5178<\/h2>\n\n\n\n
    \u53e6\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684 Python \u5185\u5efa\u6570\u636e\u7c7b\u578b\u662f\u5b57\u5178\u3002<\/p>\n\n\n\n
    \u5e8f\u5217\u662f\u4ee5\u8fde\u7eed\u7684\u6574\u6570\u4e3a\u7d22\u5f15\uff0c\u4e0e\u6b64\u4e0d\u540c\u7684\u662f\uff0c\u5b57\u5178\u4ee5\u5173\u952e\u5b57\u4e3a\u7d22\u5f15\uff0c\u5173\u952e\u5b57\u53ef\u4ee5\u662f\u4efb\u610f\u4e0d\u53ef\u53d8\u7c7b\u578b\uff0c\u901a\u5e38\u7528\u5b57\u7b26\u4e32\u6216\u6570\u503c\u3002<\/p>\n\n\n\n
    \u7406\u89e3\u5b57\u5178\u7684\u6700\u4f73\u65b9\u5f0f\u662f\u628a\u5b83\u770b\u505a\u65e0\u5e8f\u7684\u952e=>\u503c\u5bf9\u96c6\u5408\u3002\u5728\u540c\u4e00\u4e2a\u5b57\u5178\u4e4b\u5185\uff0c\u5173\u952e\u5b57\u5fc5\u987b\u662f\u4e92\u4e0d\u76f8\u540c\u3002<\/p>\n\n\n\n
    \u4e00\u5bf9\u5927\u62ec\u53f7\u521b\u5efa\u4e00\u4e2a\u7a7a\u7684\u5b57\u5178\uff1a{}\u3002<\/p>\n\n\n\n
    \u8fd9\u662f\u4e00\u4e2a\u5b57\u5178\u8fd0\u7528\u7684\u7b80\u5355\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
    >>> tel = {‘jack’: 4098, ‘sape’: 4139}
    >>> tel[‘guido’] = 4127
    >>> tel
    {‘sape’: 4139, ‘guido’: 4127, ‘jack’: 4098}
    >>> tel[‘jack’]
    4098
    >>> del<\/strong> tel[‘sape’]
    >>> tel[‘irv’] = 4127
    >>> tel
    {‘guido’: 4127, ‘irv’: 4127, ‘jack’: 4098}
    >>> list(tel.keys())
    [‘irv’, ‘guido’, ‘jack’]
    >>> sorted(tel.keys())
    [‘guido’, ‘irv’, ‘jack’]
    >>> ‘guido’ in<\/strong> tel
    True
    >>> ‘jack’ not<\/strong> in<\/strong> tel
    False<\/p>\n\n\n\n
    \u6784\u9020\u51fd\u6570 dict() \u76f4\u63a5\u4ece\u952e\u503c\u5bf9\u5143\u7ec4\u5217\u8868\u4e2d\u6784\u5efa\u5b57\u5178\u3002\u5982\u679c\u6709\u56fa\u5b9a\u7684\u6a21\u5f0f\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u6307\u5b9a\u7279\u5b9a\u7684\u952e\u503c\u5bf9\uff1a<\/p>\n\n\n\n
    >>> dict([(‘sape’, 4139), (‘guido’, 4127), (‘jack’, 4098)])
    {‘sape’: 4139, ‘jack’: 4098, ‘guido’: 4127}<\/p>\n\n\n\n
    \u6b64\u5916\uff0c\u5b57\u5178\u63a8\u5bfc\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u4efb\u610f\u952e\u548c\u503c\u7684\u8868\u8fbe\u5f0f\u8bcd\u5178\uff1a<\/p>\n\n\n\n
    >>> {x: x**2 for<\/strong> x in<\/strong> (2, 4, 6)}
    {2: 4, 4: 16, 6: 36}<\/p>\n\n\n\n
    \u5982\u679c\u5173\u952e\u5b57\u53ea\u662f\u7b80\u5355\u7684\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528\u5173\u952e\u5b57\u53c2\u6570\u6307\u5b9a\u952e\u503c\u5bf9\u6709\u65f6\u5019\u66f4\u65b9\u4fbf\uff1a<\/p>\n\n\n\n
    >>> dict(sape=4139, guido=4127, jack=4098)
    {‘sape’: 4139, ‘jack’: 4098, ‘guido’: 4127}<\/p>\n\n\n\n
    \n\n\n\n
    \u904d\u5386\u6280\u5de7<\/h2>\n\n\n\n
    \u5728\u5b57\u5178\u4e2d\u904d\u5386\u65f6\uff0c\u5173\u952e\u5b57\u548c\u5bf9\u5e94\u7684\u503c\u53ef\u4ee5\u4f7f\u7528 items() \u65b9\u6cd5\u540c\u65f6\u89e3\u8bfb\u51fa\u6765\uff1a<\/p>\n\n\n\n
    >>> knights = {‘gallahad’: ‘the pure’, ‘robin’: ‘the brave’}
    >>> for<\/strong> k, v in<\/strong> knights.items():
    …     print<\/strong>(k, v)
    …
    gallahad the pure
    robin the brave<\/p>\n\n\n\n
    \u5728\u5e8f\u5217\u4e2d\u904d\u5386\u65f6\uff0c\u7d22\u5f15\u4f4d\u7f6e\u548c\u5bf9\u5e94\u503c\u53ef\u4ee5\u4f7f\u7528 enumerate() \u51fd\u6570\u540c\u65f6\u5f97\u5230\uff1a<\/p>\n\n\n\n
    >>> for<\/strong> i, v in<\/strong> enumerate([‘tic’, ‘tac’, ‘toe’]):
    …     print<\/strong>(i, v)
    …
    0 tic
    1 tac
    2 toe<\/p>\n\n\n\n
    \u540c\u65f6\u904d\u5386\u4e24\u4e2a\u6216\u66f4\u591a\u7684\u5e8f\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528 zip() \u7ec4\u5408\uff1a<\/p>\n\n\n\n
    >>> questions = [‘name’, ‘quest’, ‘favorite color’]
    >>> answers = [‘lancelot’, ‘the holy grail’, ‘blue’]
    >>> for<\/strong> q, a in<\/strong> zip(questions, answers):
    …     print<\/strong>(‘What is your {0}?  It is {1}.’.format(q, a))
    …
    What is<\/strong> your name?  It is<\/strong> lancelot.
    What is<\/strong> your quest?  It is<\/strong> the holy grail.
    What is<\/strong> your favorite color?  It is<\/strong> blue.<\/p>\n\n\n\n
    \u8981\u53cd\u5411\u904d\u5386\u4e00\u4e2a\u5e8f\u5217\uff0c\u9996\u5148\u6307\u5b9a\u8fd9\u4e2a\u5e8f\u5217\uff0c\u7136\u540e\u8c03\u7528 reversed() \u51fd\u6570\uff1a<\/p>\n\n\n\n
    >>> for<\/strong> i in<\/strong> reversed(range(1, 10, 2)):
    …     print<\/strong>(i)
    …
    9
    7
    5
    3
    1<\/p>\n\n\n\n
    \u8981\u6309\u987a\u5e8f\u904d\u5386\u4e00\u4e2a\u5e8f\u5217\uff0c\u4f7f\u7528 sorted() \u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5df2\u6392\u5e8f\u7684\u5e8f\u5217\uff0c\u5e76\u4e0d\u4fee\u6539\u539f\u503c\uff1a<\/p>\n\n\n\n
    >>> basket = [‘apple’, ‘orange’, ‘apple’, ‘pear’, ‘orange’, ‘banana’]
    >>> for<\/strong> f in<\/strong> sorted(set(basket)):
    …     print<\/strong>(f)
    …
    apple
    banana
    orange
    pear<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u672c\u7ae0\u8282\u6211\u4eec\u4e3b\u8981\u7ed3\u5408\u524d\u9762\u6240\u5b66\u7684\u77e5\u8bc6\u70b9\u6765\u4ecb\u7ecdPython\u6570\u636e\u7ed3\u6784\u3002 \u5217\u8868...<\/p>\n","protected":false},"author":1,"featured_media":491,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1"],"views":173,"_links":{"self":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/comments?post=562"}],"version-history":[{"count":1,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/562\/revisions"}],"predecessor-version":[{"id":563,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/posts\/562\/revisions\/563"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/media\/491"}],"wp:attachment":[{"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/media?parent=562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/categories?post=562"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.pyteam.cn\/index.php\/wp-json\/wp\/v2\/tags?post=562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}