{"id":3474,"date":"2025-05-28T14:51:22","date_gmt":"2025-06-04T07:37:21","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3474"},"modified":"2025-06-04T14:51:22","modified_gmt":"2025-06-04T07:37:21","slug":"%e4%ba%86%e8%a7%a3python%e7%9a%84iter%e5%87%bd%e6%95%b8%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e7%9a%84iter%e5%87%bd%e6%95%b8%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u7684 iter() \u51fd\u6578\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

Python \u4e2d\u7684 iter() \u51fd\u6578\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10<\/h1>\n

\u5728 Python \u7de8\u7a0b\u4e2d\uff0c`iter()` \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u5275\u5efa\u53ef\u91cd\u8907\u4f7f\u7528\u7684\u8fed\u4ee3\u5668\uff0c\u80fd\u5920\u5c0d\u5404\u7a2e\u53ef\u8fed\u4ee3\u5c0d\u8c61\u9032\u884c\u6709\u6548\u7684\u8fed\u4ee3\u8655\u7406\uff0c\u4f8b\u5982\u5b57\u4e32\u3001\u5217\u8868\u3001\u5143\u7d44\u548c\u5b57\u5178\u7b49\u3002\u4e86\u89e3 `iter()` \u51fd\u6578\u7684\u4f7f\u7528\uff0c\u53ef\u4ee5\u5e6b\u52a9\u4f60\u66f4\u597d\u5730\u638c\u63e1 Python \u7684\u8fed\u4ee3\u6a5f\u5236\u3002<\/p>\n

iter() \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n

`iter()` \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

“`python
\niter(object[, sentinel])
\n“`<\/p>\n

– `object`\uff1a\u5fc5\u9700\uff0c\u70ba\u53ef\u8fed\u4ee3\u7684\u7269\u4ef6\uff08\u5982\u5217\u8868\u3001\u5b57\u5178\u7b49\uff09\u3002
\n– `sentinel`\uff1a\u53ef\u9078\u53c3\u6578\uff0c\u6307\u5b9a\u4e00\u500b\u7d50\u675f\u503c\uff0c\u7576\u8fed\u4ee3\u5230\u8a72\u503c\u6642\uff0c\u8fed\u4ee3\u5c07\u505c\u6b62\u3002<\/p>\n

iter() \u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5<\/h2>\n

`iter()` \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u5efa\u7acb\u4e00\u500b\u53ef\u91cd\u8907\u4f7f\u7528\u7684\u8fed\u4ee3\u5668\uff0c\u4e0b\u9762\u7684\u7bc4\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 `iter()` \u51fd\u6578\u4f86\u8fed\u4ee3\u8655\u7406\u5b57\u4e32\uff1a<\/p>\n

“`python
\n# \u5b9a\u7fa9\u4e00\u500b\u5b57\u4e32
\nmy_str = “Hello World!”<\/p>\n

# \u4f7f\u7528 iter() \u51fd\u6578\u5efa\u7acb\u53ef\u8fed\u4ee3\u7684\u7269\u4ef6
\nmy_iter = iter(my_str)<\/p>\n

# \u4f7f\u7528 for \u8ff4\u5708\u4f86\u8fed\u4ee3\u8655\u7406
\nfor char in my_iter:
\n print(char)
\n“`<\/p>\n

\u4e0a\u8ff0\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 `iter()` \u51fd\u6578\u5275\u5efa\u4e86\u4e00\u500b\u53ef\u8fed\u4ee3\u7684\u7269\u4ef6\uff0c\u7136\u5f8c\u4f7f\u7528 `for` \u8ff4\u5708\u4f86\u9010\u500b\u8655\u7406\u5b57\u4e32\u4e2d\u7684\u6bcf\u500b\u5b57\u5143\u3002\u9019\u6a23\u7684\u505a\u6cd5\u4e0d\u50c5\u7c21\u55ae\u660e\u77ad\uff0c\u9084\u80fd\u6709\u6548\u63d0\u9ad8\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\u8207\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n

iter() \u51fd\u6578\u7684\u512a\u9ede<\/h2>\n

\u4f7f\u7528 `iter()` \u51fd\u6578\u7684\u512a\u9ede\u5305\u62ec\uff1a
\n– **\u7c21\u5316\u7a0b\u5f0f\u78bc**\uff1a\u76f8\u6bd4\u50b3\u7d71\u7684 `for` \u8ff4\u5708\uff0c`iter()` \u53ef\u4ee5\u8b93\u8fed\u4ee3\u904e\u7a0b\u66f4\u70ba\u7c21\u6f54\u3002
\n– **\u63d0\u9ad8\u53ef\u8b80\u6027**\uff1a\u4f7f\u7528 `iter()` \u53ef\u4ee5\u4f7f\u4ee3\u78bc\u66f4\u52a0\u76f4\u89c0\uff0c\u4fbf\u65bc\u4ed6\u4eba\u7406\u89e3\u3002<\/p>\n

iter() \u51fd\u6578\u7684\u6f5b\u5728\u7f3a\u9ede<\/h2>\n

\u5118\u7ba1 `iter()` \u51fd\u6578\u975e\u5e38\u5be6\u7528\uff0c\u4f46\u5b83\u4e5f\u6709\u4e00\u4e9b\u9650\u5236\uff1a
\n– **\u50c5\u9650\u65bc\u53ef\u8fed\u4ee3\u5c0d\u8c61**\uff1a\u5982\u679c\u5617\u8a66\u5c0d\u4e0d\u53ef\u8fed\u4ee3\u7684\u5c0d\u8c61\u4f7f\u7528 `iter()`\uff0c\u5c07\u6703\u5f15\u767c\u932f\u8aa4\u3002
\n– **\u7121\u6cd5\u76f4\u63a5\u8655\u7406\u7a7a\u5c0d\u8c61**\uff1a\u5c0d\u65bc\u7a7a\u7684\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff0c`iter()` \u4ecd\u7136\u6703\u8fd4\u56de\u4e00\u500b\u8fed\u4ee3\u5668\uff0c\u4f46\u8fed\u4ee3\u904e\u7a0b\u5c07\u4e0d\u6703\u7522\u751f\u4efb\u4f55\u5143\u7d20\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528\uff1a\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668<\/h2>\n

\u9664\u4e86\u4f7f\u7528\u5167\u5efa\u7684\u53ef\u8fed\u4ee3\u5c0d\u8c61\u5916\uff0c\u4f60\u9084\u53ef\u4ee5\u5275\u5efa\u81ea\u5b9a\u7fa9\u7684\u8fed\u4ee3\u5668\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668\u985e\u5225\uff1a<\/p>\n

“`python
\nclass MyIterator:
\n def __init__(self, limit):
\n self.limit = limit
\n self.current = 0<\/p>\n

def __iter__(self):
\n return self<\/p>\n

def __next__(self):
\n if self.current < self.limit:\n result = self.current\n self.current += 1\n return result\n else:\n raise StopIteration\n\n# \u4f7f\u7528\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668\nfor num in MyIterator(5):\n print(num)\n```\n\n\u9019\u6a23\u7684\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u9032\u884c\u64f4\u5c55\u548c\u4fee\u6539\uff0c\u63d0\u4f9b\u66f4\u591a\u9748\u6d3b\u6027\u3002\n\n\n\n

\u932f\u8aa4\u6392\u9664\uff1a\u5e38\u898b\u554f\u984c<\/h2>\n

1. **\u4f7f\u7528 iter() \u51fd\u6578\u6642\u51fa\u73fe TypeError**\uff1a
\n – \u78ba\u4fdd\u50b3\u905e\u7684\u5c0d\u8c61\u662f\u53ef\u8fed\u4ee3\u7684\uff0c\u4f8b\u5982\u5217\u8868\u6216\u5b57\u5178\uff0c\u907f\u514d\u50b3\u905e\u6574\u6578\u6216\u5176\u4ed6\u975e\u53ef\u8fed\u4ee3\u985e\u578b\u3002<\/p>\n

2. **\u8fed\u4ee3\u5668\u8fd4\u56de\u7a7a\u503c**\uff1a
\n – \u6aa2\u67e5\u662f\u5426\u5c0d\u7a7a\u7684\u53ef\u8fed\u4ee3\u5c0d\u8c61\u4f7f\u7528 `iter()`\uff0c\u5728\u9032\u884c\u8fed\u4ee3\u4e4b\u524d\uff0c\u78ba\u4fdd\u5c0d\u8c61\u4e2d\u6709\u5143\u7d20\u3002<\/p>\n

\u7d50\u8ad6<\/h2>\n

`iter()` \u51fd\u6578\u5728 Python \u4e2d\u662f\u4e00\u7a2e\u65b9\u4fbf\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u53ef\u91cd\u8907\u4f7f\u7528\u7684\u8fed\u4ee3\u5668\uff0c\u4ee5\u4fbf\u8655\u7406\u5404\u7a2e\u53ef\u8fed\u4ee3\u7684\u5c0d\u8c61\u3002\u7121\u8ad6\u662f\u5167\u5efa\u7684\u6578\u64da\u7d50\u69cb\u9084\u662f\u81ea\u5b9a\u7fa9\u7684\u8fed\u4ee3\u5668\uff0c\u638c\u63e1\u9019\u4e00\u51fd\u6578\u90fd\u80fd\u5e6b\u52a9\u4f60\u5beb\u51fa\u66f4\u7c21\u6f54\u3001\u9ad8\u6548\u7684\u4ee3\u78bc\u3002<\/p>\n

\u5982\u679c\u60f3\u6df1\u5165\u4e86\u89e3 Python \u7684\u66f4\u591a\u5167\u5bb9\uff0c\u6b61\u8fce\u53c3\u8003\u6211\u7684\u5176\u4ed6\u6587\u7ae0\uff1a[Python \u6559\u5b78\u8cc7\u6e90](https:\/\/vocus.cc) \u3002<\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1\uff1aiter() \u51fd\u6578\u662f\u4ec0\u9ebc\uff1f**
\nA1\uff1a`iter()` \u51fd\u6578\u7528\u65bc\u5275\u5efa\u4e00\u500b\u53ef\u91cd\u8907\u4f7f\u7528\u7684\u8fed\u4ee3\u5668\uff0c\u80fd\u5920\u5c0d\u53ef\u8fed\u4ee3\u5c0d\u8c61\u9032\u884c\u8fed\u4ee3\u3002<\/p>\n

**Q2\uff1a\u5982\u4f55\u8655\u7406\u4e0d\u53ef\u8fed\u4ee3\u7684\u5c0d\u8c61\uff1f**
\nA2\uff1a\u5c0d\u65bc\u4e0d\u53ef\u8fed\u4ee3\u7684\u5c0d\u8c61\uff0c\u4f60\u9700\u8981\u4f7f\u7528 `for` \u8ff4\u5708\u6216\u5176\u4ed6\u65b9\u6cd5\u4f86\u624b\u52d5\u8655\u7406\u3002<\/p>\n

**Q3\uff1a\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668\u7684\u512a\u52e2\u6709\u54ea\u4e9b\uff1f**
\nA3\uff1a\u81ea\u5b9a\u7fa9\u8fed\u4ee3\u5668\u53ef\u4ee5\u6839\u64da\u7279\u5b9a\u9700\u6c42\u9032\u884c\u64f4\u5c55\uff0c\u63d0\u4f9b\u66f4\u5927\u7684\u9748\u6d3b\u6027\uff0c\u4e26\u4e14\u80fd\u5920\u66f4\u597d\u5730\u63a7\u5236\u8fed\u4ee3\u884c\u70ba\u3002
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6458\u8981(Description):iter()\u51fd\u6578\u53ef\u4ee5\u5c07\u53ef\u8fed\u4ee3\u7684\u5c0d\u8c61\u8f49\u63db\u70ba\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u7528\u65bcfor\u5faa\u74b0\u4e2d\uff0c\u53ef\u4ee5\u66f4\u6709\u6548\u7387\u7684\u904d\u6b77\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u7684\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":2518,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[18],"tags":[15],"class_list":["post-3474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-python"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2022\/12\/DALL\u00b7E-2022-12-28-14.25.55-\u62f7\u8c9d2.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-U2","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3474","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=3474"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3474\/revisions"}],"predecessor-version":[{"id":12821,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3474\/revisions\/12821"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/2518"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}