{"id":968898,"date":"2024-12-27T05:11:21","date_gmt":"2024-12-26T21:11:21","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/968898.html"},"modified":"2024-12-27T05:11:23","modified_gmt":"2024-12-26T21:11:23","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e7%a9%ba%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/968898.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u5224\u65ad\u7a7a\u884c"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u5224\u65ad\u7a7a\u884c\"<\/p>\n

\u5728Python\u4e2d\u5224\u65ad\u7a7a\u884c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u5185\u7f6e\u65b9\u6cd5\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u9010\u884c\u8bfb\u53d6\u6587\u4ef6<\/strong>\u7b49\u591a\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u5224\u65ad\u7a7a\u884c\u7684\u8fc7\u7a0b\u901a\u5e38\u6d89\u53ca\u5230\u5bf9\u5b57\u7b26\u4e32\u7684\u5904\u7406\u548c\u5224\u65ad\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u5b57\u7b26\u4e32\u7684\u5185\u7f6e\u65b9\u6cd5<\/strong>\uff1aPython\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5b57\u7b26\u4e32\u65b9\u6cd5\uff0c\u4f8b\u5982strip()<\/code>\uff0c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u767d\u5b57\u7b26\u3002\u901a\u8fc7strip()<\/code>\u65b9\u6cd5\u5904\u7406\u5b57\u7b26\u4e32\u540e\uff0c\u5982\u679c\u7ed3\u679c\u662f\u7a7a\u5b57\u7b26\u4e32\uff0c\u5219\u53ef\u4ee5\u5224\u65ad\u8be5\u884c\u662f\u7a7a\u884c\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u7b26\u4e32\u65b9\u6cd5\u5224\u65ad\u7a7a\u884c<\/h3>\n<\/p>\n

\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u5224\u65ad\u7a7a\u884c\u662f\u6700\u7b80\u5355\u4e14\u76f4\u63a5\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002strip()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u79fb\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7684\u7a7a\u767d\u5b57\u7b26\uff08\u5305\u62ec\u7a7a\u683c\u3001\u5236\u8868\u7b26\u548c\u6362\u884c\u7b26\u7b49\uff09\u3002\u5982\u679c\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u540e\uff0c\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a\u96f6\uff0c\u5219\u8be5\u884c\u53ef\u4ee5\u88ab\u8ba4\u4e3a\u662f\u7a7a\u884c\u3002<\/p>\n<\/p>\n

line = "   \\n"<\/p>\n
if line.strip() == "":<\/p>\n
    print("This is an empty line.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cline.strip()<\/code>\u53bb\u9664\u4e86\u5b57\u7b26\u4e32line<\/code>\u4e2d\u7684\u6240\u6709\u9996\u5c3e\u7a7a\u767d\u5b57\u7b26\u3002\u5982\u679c\u7ed3\u679c\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff08\u5373\u957f\u5ea6\u4e3a\u96f6\uff09\uff0c\u5219\u8bf4\u660e\u8be5\u884c\u662f\u7a7a\u884c\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5224\u65ad\u7a7a\u884c<\/h3>\n<\/p>\n
\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u5224\u65ad\u7a7a\u884c\u901a\u5e38\u662f\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u5e76\u5bf9\u6bcf\u884c\u8fdb\u884c\u5224\u65ad\u3002<\/p>\n<\/p>\n
\u6253\u5f00\u6587\u4ef6\u5e76\u9010\u884c\u8bfb\u53d6<\/h4>\n<\/p>\n
\u4f7f\u7528with open()<\/code>\u8bed\u53e5\u6253\u5f00\u6587\u4ef6\uff0c\u5e76\u4f7f\u7528readlines()<\/code>\u65b9\u6cd5\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u5bf9\u6bcf\u884c\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u5224\u65ad\u662f\u5426\u4e3a\u7a7a\u884c\u3002<\/p>\n<\/p>\n
with open('example.txt', 'r') as file:<\/p>\n
    for line_number, line in enumerate(file, start=1):<\/p>\n
        if line.strip() == "":<\/p>\n
            print(f"Line {line_number} is an empty line.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cenumerate()<\/code>\u51fd\u6570\u7528\u4e8e\u540c\u65f6\u83b7\u53d6\u884c\u53f7\u548c\u884c\u5185\u5bb9\u3002\u8fd9\u6837\u53ef\u4ee5\u5728\u5224\u65ad\u7a7a\u884c\u65f6\uff0c\u8f93\u51fa\u5177\u4f53\u7684\u884c\u53f7\u4fe1\u606f\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5224\u65ad\u7a7a\u884c<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5904\u7406\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u590d\u6742\u7684\u6a21\u5f0f\u5339\u914d\u64cd\u4f5c\u3002\u5728\u5224\u65ad\u7a7a\u884c\u65f6\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u540c\u6837\u53ef\u4ee5\u53d1\u6325\u4f5c\u7528\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7a7a\u884c<\/h4>\n<\/p>\n
\u901a\u8fc7re<\/code>\u6a21\u5757\u4e2d\u7684match()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7a7a\u884c\u3002\u7a7a\u884c\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u901a\u5e38\u662fr'^\\s*$'<\/code>\uff0c\u8868\u793a\u5339\u914d\u7531\u7a7a\u767d\u5b57\u7b26\u7ec4\u6210\u7684\u884c\u3002<\/p>\n<\/p>\n
import re<\/p>\n
line = "   \\t\\n"<\/p>\n
if re.match(r'^\\s*$', line):<\/p>\n
    print("This is an empty line.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0fr'^\\s*$'<\/code>\u7528\u4e8e\u5339\u914d\u4ec5\u5305\u542b\u7a7a\u767d\u5b57\u7b26\u7684\u884c\u3002re.match()<\/code>\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5339\u914d\u5bf9\u8c61\uff0c\u5982\u679c\u5339\u914d\u6210\u529f\uff0c\u5219\u8bf4\u660e\u8be5\u884c\u662f\u7a7a\u884c\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5e94\u7528\u573a\u666f\u4e0e\u4f18\u5316\u5efa\u8bae<\/h3>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u4e0d\u540c\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u5224\u65ad\u7a7a\u884c\u3002<\/p>\n<\/p>\n
\u5904\u7406\u5c0f\u6587\u4ef6<\/h4>\n<\/p>\n
\u5bf9\u4e8e\u5c0f\u6587\u4ef6\uff0c\u9010\u884c\u8bfb\u53d6\u5e76\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u5224\u65ad\u7a7a\u884c\u901a\u5e38\u662f\u6700\u7b80\u5355\u548c\u76f4\u63a5\u7684\u65b9\u6cd5\u3002\u5b83\u7684\u5b9e\u73b0\u7b80\u5355\u660e\u4e86\uff0c\u9002\u5408\u5927\u591a\u6570\u5e38\u89c4\u5e94\u7528\u3002<\/p>\n<\/p>\n
\u5904\u7406\u5927\u6587\u4ef6<\/h4>\n<\/p>\n
\u5bf9\u4e8e\u5927\u6587\u4ef6\uff0c\u9010\u884c\u8bfb\u53d6\u5e76\u5904\u7406\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u8fc7\u591a\u3002\u8fd9\u65f6\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u751f\u6210\u5668\uff08yield<\/code>\uff09\u6765\u9010\u884c\u5904\u7406\uff0c\u907f\u514d\u4e00\u6b21\u6027\u52a0\u8f7d\u6574\u4e2a\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<\/p>\n
def read_large_file(file_path):<\/p>\n
    with open(file_path, 'r') as file:<\/p>\n
        for line in file:<\/p>\n
            yield line<\/p>\n
for line_number, line in enumerate(read_large_file('large_example.txt'), start=1):<\/p>\n
    if line.strip() == "":<\/p>\n
        print(f"Line {line_number} is an empty line.")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u751f\u6210\u5668\uff0c\u6bcf\u6b21\u53ea\u8bfb\u53d6\u4e00\u884c\uff0c\u5185\u5b58\u5360\u7528\u66f4\u4e3a\u9ad8\u6548\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/h4>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u590d\u6742\u5339\u914d\u89c4\u5219\u7684\u573a\u666f\u3002\u4f8b\u5982\uff0c\u5f53\u9700\u8981\u540c\u65f6\u5224\u65ad\u7a7a\u884c\u548c\u7279\u5b9a\u683c\u5f0f\u7684\u884c\u65f6\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u63d0\u4f9b\u7075\u6d3b\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5728Python\u4e2d\u5224\u65ad\u7a7a\u884c\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u5185\u7f6e\u65b9\u6cd5\u3001\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong>\u7b49\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u5e94\u6839\u636e\u5177\u4f53\u5e94\u7528\u573a\u666f\u548c\u6027\u80fd\u9700\u6c42\u3002\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u9010\u884c\u8bfb\u53d6\u7ed3\u5408\u5b57\u7b26\u4e32\u65b9\u6cd5\u662f\u5e38\u7528\u7684\u7b80\u4fbf\u65b9\u6cd5\uff1b\u800c\u5bf9\u4e8e\u590d\u6742\u6a21\u5f0f\u5339\u914d\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\u652f\u6301\u3002\u603b\u4e4b\uff0c\u5408\u7406\u9009\u62e9\u548c\u7ec4\u5408\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u9ad8\u6548\u5730\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5728Python\u4e2d\uff0c\u5982\u4f55\u68c0\u67e5\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u884c\uff1f<\/strong>
\u8981\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u53bb\u6389\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u767d\u5b57\u7b26\u3002\u5982\u679c\u5904\u7406\u540e\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a\u96f6\uff0c\u5219\u8bf4\u660e\u8be5\u884c\u662f\u7a7a\u884c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
line = "   "  # \u793a\u4f8b\u5b57\u7b26\u4e32\nif len(line.strip()) == 0:\n    print("\u8fd9\u662f\u4e00\u4e2a\u7a7a\u884c")\n<\/code><\/pre>\n
\u5982\u4f55\u5728\u8bfb\u53d6\u6587\u4ef6\u65f6\u5224\u65ad\u7a7a\u884c\uff1f<\/strong>
\u5728\u8bfb\u53d6\u6587\u4ef6\u65f6\uff0c\u53ef\u4ee5\u9010\u884c\u8bfb\u53d6\u5e76\u5e94\u7528\u76f8\u540c\u7684strip()<\/code>\u65b9\u6cd5\u6765\u68c0\u67e5\u6bcf\u4e00\u884c\u662f\u5426\u4e3a\u7a7a\u884c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a  <\/p>\n
with open('example.txt', 'r') as file:\n    for line in file:\n        if len(line.strip()) == 0:\n            print("\u53d1\u73b0\u7a7a\u884c")\n<\/code><\/pre>\n
\u5728Python\u4e2d\uff0c\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5904\u7406\u7a7a\u884c\uff1f<\/strong>
\u5904\u7406\u7a7a\u884c\u7684\u65b9\u5f0f\u6709\u591a\u79cd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\u8bfb\u53d6\u6570\u636e\u65f6\u5ffd\u7565\u7a7a\u884c\uff0c\u6216\u8005\u5728\u8f93\u51fa\u5185\u5bb9\u65f6\u8fc7\u6ee4\u6389\u7a7a\u884c\u3002\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff1a  <\/p>\n
with open('example.txt', 'r') as file:\n    non_empty_lines = [line for line in file if len(line.strip()) > 0]\n<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u5f0f\u4f1a\u521b\u5efa\u4e00\u4e2a\u53ea\u5305\u542b\u975e\u7a7a\u884c\u7684\u5217\u8868\uff0c\u65b9\u4fbf\u540e\u7eed\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u5224\u65ad\u7a7a\u884c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u5185\u7f6e\u65b9\u6cd5\u3001\u5229\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u7b49\u591a\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u5224\u65ad\u7a7a\u884c\u7684 […]","protected":false},"author":3,"featured_media":968903,"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\/968898"}],"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=968898"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/968898\/revisions"}],"predecessor-version":[{"id":968905,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/968898\/revisions\/968905"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/968903"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=968898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=968898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=968898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}