import itertools<\/p>\niterator1 = iter([1, 2, 3])<\/p>\n
iterator2 = iter([4, 5, 6])<\/p>\n
iterator3 = iter([7, 8, 9])<\/p>\n
merged_iterator = itertools.chain(iterator1, iterator2, iterator3)<\/p>\n
for item in merged_iterator:<\/p>\n
print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0citertools.chain()<\/code>\u63a5\u53d7\u4e86\u4e09\u4e2a\u8fed\u4ee3\u5668\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u8fed\u4ee3\u5668merged_iterator<\/code>\uff0c\u5b83\u4f9d\u6b21\u904d\u5386\u8fd9\u4e09\u4e2a\u8fed\u4ee3\u5668\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n2. \u6027\u80fd\u4e0e\u4f18\u52bf<\/h4>\n<\/p>\n
\u4f7f\u7528itertools.chain()<\/code>\u7684\u4e00\u4e2a\u4e3b\u8981\u4f18\u52bf\u662f\u5b83\u7684\u6027\u80fd\u975e\u5e38\u597d\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u5904\u7406\u8fed\u4ee3\u5668\uff0c\u4e0d\u9700\u8981\u5c06\u5143\u7d20\u5b9e\u9645\u5b58\u50a8\u5230\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u4e2d\u3002\u6b64\u5916\uff0c\u5b83\u53ef\u4ee5\u5904\u7406\u4efb\u610f\u6570\u91cf\u7684\u8fed\u4ee3\u5668\uff0c\u5e76\u4e14\u9002\u7528\u4e8e\u4efb\u610f\u5927\u5c0f\u7684\u6570\u636e\u96c6\u3002<\/p>\n<\/p>\n\u4e8c\u3001\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u7075\u6d3b\u4e14\u4f18\u96c5\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5728\u5408\u5e76\u8fc7\u7a0b\u4e2d\u5bf9\u5143\u7d20\u8fdb\u884c\u989d\u5916\u5904\u7406\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
1. \u4f7f\u7528\u793a\u4f8b<\/h4>\n<\/p>\n
def merge_iterators(*iterators):<\/p>\n for iterator in iterators:<\/p>\n
for item in iterator:<\/p>\n
yield item<\/p>\n
iterator1 = iter([1, 2, 3])<\/p>\n
iterator2 = iter([4, 5, 6])<\/p>\n
iterator3 = iter([7, 8, 9])<\/p>\n
merged_iterator = merge_iterators(iterator1, iterator2, iterator3)<\/p>\n
for item in merged_iterator:<\/p>\n
print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cmerge_iterators<\/code>\u662f\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570\uff0c\u5b83\u4f7f\u7528yield<\/code>\u5173\u952e\u5b57\u5c06\u6bcf\u4e2a\u8fed\u4ee3\u5668\u7684\u5143\u7d20\u4e00\u4e2a\u4e00\u4e2a\u5730\u8fd4\u56de\u3002<\/p>\n<\/p>\n2. \u7075\u6d3b\u6027\u4e0e\u6269\u5c55\u6027<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u5728\u8fd4\u56de\u5143\u7d20\u4e4b\u524d\u5bf9\u5176\u8fdb\u884c\u5904\u7406\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\u8fd4\u56de\u524d\u5bf9\u5143\u7d20\u8fdb\u884c\u8fc7\u6ee4\u3001\u8f6c\u6362\u6216\u7d2f\u79ef\u3002\u8fd9\u4f7f\u5f97\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u5728\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u9884\u5904\u7406\u7684\u573a\u666f\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528yield from<\/code>\u8bed\u53e5<\/h3>\n<\/p>\nyield from<\/code>\u662fPython 3.3\u5f15\u5165\u7684\u4e00\u79cd\u7b80\u5316\u751f\u6210\u5668\u7684\u8bed\u6cd5\u7cd6\uff0c\u7279\u522b\u9002\u5408\u7528\u6765\u5408\u5e76\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n1. \u4f7f\u7528\u793a\u4f8b<\/h4>\n<\/p>\n
def merge_iterators(*iterators):<\/p>\n for iterator in iterators:<\/p>\n
yield from iterator<\/p>\n
iterator1 = iter([1, 2, 3])<\/p>\n
iterator2 = iter([4, 5, 6])<\/p>\n
iterator3 = iter([7, 8, 9])<\/p>\n
merged_iterator = merge_iterators(iterator1, iterator2, iterator3)<\/p>\n
for item in merged_iterator:<\/p>\n
print(item)<\/p>\n
<\/code><\/pre>\n<\/p>\n
yield from iterator<\/code>\u8bed\u53e5\u4f1a\u81ea\u52a8\u5904\u7406\u8fed\u4ee3\u5668iterator<\/code>\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u4ea4\u7ed9\u8c03\u7528\u8005\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u4ee3\u7801\u7b80\u6d01\uff0c\u800c\u4e14\u6027\u80fd\u4f18\u5f02\u3002<\/p>\n<\/p>\n2. \u7b80\u6d01\u6027\u4e0e\u6613\u8bfb\u6027<\/h4>\n<\/p>\n
yield from<\/code>\u8bed\u6cd5\u4f7f\u5f97\u751f\u6210\u5668\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u548c\u6613\u8bfb\uff0c\u51cf\u5c11\u4e86\u5d4c\u5957\u5faa\u73af\u7684\u590d\u6742\u6027\u3002\u5bf9\u4e8e\u590d\u6742\u7684\u751f\u6210\u5668\u903b\u8f91\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u6e05\u6670\u7684\u8868\u8fbe\u65b9\u5f0f\u3002<\/p>\n<\/p>\n\u56db\u3001\u6bd4\u8f83\u4e0e\u9009\u62e9<\/h3>\n<\/p>\n
\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u6765\u5408\u5e76\u8fed\u4ee3\u5668\u53d6\u51b3\u4e8e\u5177\u4f53\u9700\u6c42\uff1a<\/p>\n<\/p>\n
\nitertools.chain()<\/code><\/strong>\uff1a\u5f53\u53ea\u9700\u8981\u7b80\u5355\u5408\u5e76\u8fed\u4ee3\u5668\u65f6\uff0c\u8fd9\u662f\u6700\u7b80\u5355\u548c\u9ad8\u6548\u7684\u65b9\u6cd5\u3002<\/li>\n- \u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/strong>\uff1a\u5f53\u9700\u8981\u5728\u5408\u5e76\u8fc7\u7a0b\u4e2d\u5bf9\u5143\u7d20\u8fdb\u884c\u5904\u7406\u65f6\uff0c\u751f\u6210\u5668\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u7075\u6d3b\u6027\u3002<\/li>\n
yield from<\/code>\u8bed\u53e5<\/strong>\uff1a\u5728Python 3.3\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0cyield from<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u751f\u6210\u5668\uff0c\u7279\u522b\u9002\u5408\u9700\u8981\u5408\u5e76\u591a\u4e2a\u8fed\u4ee3\u5668\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n\u4e94\u3001\u5b9e\u7528\u793a\u4f8b<\/h3>\n<\/p>\n
\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u5408\u5e76\u8fed\u4ee3\u5668\u7684\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u4e00\u4e9b\u5b9e\u9645\u7684\u4f7f\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n
1. \u5408\u5e76\u6587\u4ef6\u884c<\/h4>\n<\/p>\n
\u5047\u8bbe\u6709\u591a\u4e2a\u6587\u4ef6\uff0c\u9700\u8981\u9010\u884c\u8bfb\u53d6\u5b83\u4eec\u7684\u5185\u5bb9\u5e76\u5408\u5e76\u5230\u4e00\u4e2a\u8fed\u4ee3\u5668\u4e2d\u3002<\/p>\n<\/p>\n
def merge_files(*filenames):<\/p>\n for filename in filenames:<\/p>\n
with open(filename, 'r') as file:<\/p>\n
yield from file<\/p>\n
files = ['file1.txt', 'file2.txt', 'file3.txt']<\/p>\n
for line in merge_files(*files):<\/p>\n
print(line.strip())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cmerge_files<\/code>\u51fd\u6570\u9010\u4e2a\u6253\u5f00\u6587\u4ef6\uff0c\u5e76\u4f7f\u7528yield from<\/code>\u9010\u884c\u8bfb\u53d6\u5185\u5bb9\u3002<\/p>\n<\/p>\n2. \u5904\u7406\u5927\u6570\u636e\u6d41<\/h4>\n<\/p>\n
\u5728\u5927\u6570\u636e\u5904\u7406\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5408\u5e76\u6765\u81ea\u591a\u4e2a\u6570\u636e\u6d41\u7684\u8fed\u4ee3\u5668\uff0c\u800c\u4e0d\u5e0c\u671b\u5c06\u6240\u6709\u6570\u636e\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002<\/p>\n<\/p>\n
def process_data_streams(*streams):<\/p>\n for stream in streams:<\/p>\n
for data in stream:<\/p>\n
# \u5904\u7406\u6570\u636e<\/p>\n
yield data<\/p>\n
stream1 = (x for x in range(1000000))<\/p>\n
stream2 = (x for x in range(1000000, 2000000))<\/p>\n
for data in process_data_streams(stream1, stream2):<\/p>\n
print(data)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u751f\u6210\u5668\u6765\u5904\u7406\u548c\u5408\u5e76\u5927\u6570\u636e\u6d41\uff0c\u800c\u4e0d\u4f1a\u5360\u7528\u5927\u91cf\u5185\u5b58\u3002<\/p>\n<\/p>\n
\u516d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5408\u5e76\u8fed\u4ee3\u5668\u662fPython\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u5e38\u89c1\u9700\u6c42\uff0citertools.chain()<\/code>\u3001\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u548cyield from<\/code>\u8bed\u53e5\u63d0\u4f9b\u4e86\u7075\u6d3b\u800c\u9ad8\u6548\u7684\u89e3\u51b3\u65b9\u6848\u3002\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u9700\u6c42\u3002\u901a\u8fc7\u7406\u89e3\u8fd9\u4e9b\u5de5\u5177\u7684\u5de5\u4f5c\u539f\u7406\u548c\u9002\u7528\u573a\u666f\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7f16\u5199\u9ad8\u6548\u7684Python\u4ee3\u7801\u3002<\/p>\n<\/p>\n\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n Python\u4e2d\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u5408\u5e76\u591a\u4e2a\u8fed\u4ee3\u5668\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u5408\u5e76\u591a\u4e2a\u8fed\u4ee3\u5668\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\u5b9e\u73b0\u3002\u4f7f\u7528itertools.chain()<\/code>\u51fd\u6570\u662f\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u5c06\u591a\u4e2a\u8fed\u4ee3\u5668\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u5f62\u6210\u4e00\u4e2a\u65b0\u7684\u8fed\u4ee3\u5668\u3002\u6b64\u5916\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5408\u5e76\u8fed\u4ee3\u5668\u3002\u901a\u8fc7\u5c06\u591a\u4e2a\u8fed\u4ee3\u5668\u653e\u5165\u4e00\u4e2a\u5217\u8868\u4e2d\uff0c\u7136\u540e\u4f7f\u7528for<\/code>\u5faa\u73af\u8fdb\u884c\u904d\u5386\uff0c\u4e5f\u80fd\u591f\u5b9e\u73b0\u5408\u5e76\u6548\u679c\u3002<\/p>\n\u5408\u5e76\u8fed\u4ee3\u5668\u65f6\u662f\u5426\u4f1a\u5f71\u54cd\u539f\u59cb\u8fed\u4ee3\u5668\u7684\u72b6\u6001\uff1f<\/strong>
\u5408\u5e76\u8fed\u4ee3\u5668\u7684\u8fc7\u7a0b\u4e0d\u4f1a\u5f71\u54cd\u539f\u59cb\u8fed\u4ee3\u5668\u7684\u72b6\u6001\u3002\u6bcf\u4e2a\u8fed\u4ee3\u5668\u5728\u5408\u5e76\u540e\u4ecd\u7136\u4fdd\u6301\u72ec\u7acb\uff0c\u60a8\u53ef\u4ee5\u5728\u9700\u8981\u7684\u65f6\u5019\u5355\u72ec\u8fed\u4ee3\u6bcf\u4e2a\u539f\u59cb\u8fed\u4ee3\u5668\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fed\u4ee3\u5668\u4e00\u65e6\u88ab\u5b8c\u5168\u8fed\u4ee3\u8fc7\uff0c\u5176\u72b6\u6001\u4f1a\u53d8\u4e3a\u8017\u5c3d\uff0c\u65e0\u6cd5\u91cd\u65b0\u4f7f\u7528\uff0c\u56e0\u6b64\u5728\u5408\u5e76\u524d\u786e\u4fdd\u5bf9\u539f\u59cb\u8fed\u4ee3\u5668\u7684\u72b6\u6001\u6709\u6e05\u6670\u7684\u7406\u89e3\u3002<\/p>\n\u5408\u5e76\u8fed\u4ee3\u5668\u65f6\u6709\u54ea\u4e9b\u6027\u80fd\u8003\u8651\uff1f<\/strong>
\u5728\u5408\u5e76\u8fed\u4ee3\u5668\u65f6\uff0c\u6027\u80fd\u4e3b\u8981\u53d6\u51b3\u4e8e\u6240\u4f7f\u7528\u7684\u65b9\u6cd5\u548c\u6570\u636e\u91cf\u3002\u5982\u679c\u4f7f\u7528itertools.chain()<\/code>\uff0c\u5b83\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u5408\u5e76\u65b9\u5f0f\uff0c\u5c24\u5176\u9002\u5408\u5904\u7406\u5927\u91cf\u6570\u636e\u3002\u800c\u5982\u679c\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u6216\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u53ef\u80fd\u4f1a\u5728\u5185\u5b58\u4f7f\u7528\u4e0a\u4ea7\u751f\u4e0d\u540c\u7684\u5f71\u54cd\u3002\u5efa\u8bae\u5728\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\uff0c\u4f18\u5148\u9009\u62e9\u5185\u5b58\u6548\u7387\u8f83\u9ad8\u7684\u65b9\u6cd5\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\u6d88\u8017\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u5408\u5e76\u8fed\u4ee3\u5668\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528itertools.chAIn()\u51fd\u6570\u3001\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u3001\u4ee5\u53ca\u4f7f\u7528yi […]","protected":false},"author":3,"featured_media":965596,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/965587"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=965587"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/965587\/revisions"}],"predecessor-version":[{"id":965598,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/965587\/revisions\/965598"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/965596"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=965587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=965587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=965587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"python\u5982\u4f55\u5408\u5e76\u8fed\u4ee3\u5668\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24181815\/0efdbe9e-e17c-4b9b-8052-dbef66c763b7.webp\")
<\/p>\n