{"id":706,"date":"2025-05-07T19:48:38","date_gmt":"2025-05-07T11:48:38","guid":{"rendered":"https:\/\/www.ddosidc.com\/wp\/?p=706"},"modified":"2025-05-07T19:48:38","modified_gmt":"2025-05-07T11:48:38","slug":"python-%e6%89%be%e5%88%b0%e6%96%87%e4%bb%b6%e7%9a%84%e6%8c%87%e5%ae%9a%e8%a1%8c%e6%b7%bb%e5%8a%a0%e4%bb%a3%e7%a0%81%e6%97%b6%e9%9c%80%e8%a6%81%e5%93%aa%e4%ba%9b%e6%ad%a5%e9%aa%a4%e5%92%8c%e6%b3%a8","status":"publish","type":"post","link":"https:\/\/www.ddosidc.com\/wp\/706.html","title":{"rendered":"Python \u627e\u5230\u6587\u4ef6\u7684\u6307\u5b9a\u884c\u6dfb\u52a0\u4ee3\u7801\u65f6\u9700\u8981\u54ea\u4e9b\u6b65\u9aa4\u548c\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"

\"Python<\/p>\n

1. \u4f7f\u7528 Python \u64cd\u4f5c\u6587\u4ef6\u7684\u57fa\u7840<\/h3>\n<\/p>\n

\u5728\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c\u65f6\uff0cPython \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8f7b\u677e\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u3002\u7279\u522b l\u00e0\uff0c\u5bf9\u4e8e\u8981\u5728\u6307\u5b9a\u884c\u6dfb\u52a0\u4ee3\u7801\u7684\u64cd\u4f5c\uff0c\u901a\u5e38\u6d89\u53ca\u5230\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u5b9a\u4f4d\u5230\u7279\u5b9a\u884c\uff0c\u7136\u540e\u518d\u8fdb\u884c\u4fee\u6539\u3002Python \u7684\u5185\u7f6e\u51fd\u6570\u975e\u5e38\u65b9\u4fbf\uff0c\u4f7f\u7528\u8d77\u6765\u4e5f\u76f8\u5bf9\u7b80\u5355\u3002\u4ee5\u6587\u672c\u6587\u4ef6\u4e3a\u4f8b\uff0c\u901a\u5e38\u7684\u64cd\u4f5c\u6d41\u7a0b\u662f\u5148\u5c06\u6587\u4ef6\u5185\u5bb9\u8bfb\u53d6\u5230\u5185\u5b58\uff0c\u8fdb\u884c\u4fee\u6539\u540e\u518d\u5199\u56de\u6587\u4ef6\u3002<\/p>\n<\/p>\n

\n

2. \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9<\/h3>\n<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u8bfb\u53d6\u6587\u4ef6\u7684\u6240\u6709\u5185\u5bb9\u3002\u53ef\u4ee5\u4f7f\u7528 `open()` \u51fd\u6570\u6765\u6253\u5f00\u6587\u4ef6\uff0c\u7136\u540e\u4f7f\u7528 `readlines()` \u65b9\u6cd5\u5c06\u6587\u4ef6\u4e2d\u7684\u6bcf\u4e00\u884c\u5b58\u50a8\u5230\u4e00\u4e2a\u5217\u8868\u4e2d\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<\/p>\n

filename = 'example.txt'<\/p>\r\n
with open(filename, 'r') as file:<\/p>\r\n
    lines = file.readlines()<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c`lines` \u5c06\u5305\u542b\u6587\u4ef6\u4e2d\u6bcf\u4e00\u884c\u7684\u6587\u672c\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u884c\u6570\u8fdb\u884c\u5b9a\u4f4d\uff0c\u4ee5\u4fbf\u4e8e\u5728\u7279\u5b9a\u884c\u63d2\u5165\u65b0\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\n
3. \u627e\u5230\u6307\u5b9a\u884c\u5e76\u6dfb\u52a0\u4ee3\u7801<\/h3>\n<\/p>\n
\u786e\u5b9a\u8981\u6dfb\u52a0\u4ee3\u7801\u7684\u884c\u6570\u540e\uff0c\u53ef\u4ee5\u7b80\u5355\u5730\u5c06\u65b0\u4ee3\u7801\u63d2\u5165\u8be5\u884c\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u6253\u7b97\u5728\u7b2c 3 \u884c\u63d2\u5165\u4e00\u6bb5\u65b0\u4ee3\u7801\uff1a<\/p>\n
– \u7b2c 1 \u884c\uff1a\u539f\u6709\u4ee3\u7801<\/p>\n
– \u7b2c 2 \u884c\uff1a\u539f\u6709\u4ee3\u7801<\/p>\n
– \u7b2c 3 \u884c\uff1a\u6211\u4eec\u7684\u65b0\u4ee3\u7801<\/p>\n
\u8fd9\u91cc\u7684\u4ee3\u7801\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u6307\u5b9a\u884c\u63d2\u5165\u4ee3\u7801\uff1a<\/p>\n<\/p>\n
new_code = 'print(\"Hello World\")\\n'<\/p>\r\n
line_number = 2  # \u5728\u7b2c\u4e09\u884c\u63d2\u5165\u65b0\u4ee3\u7801\uff0c\u56e0\u6b64\u7d22\u5f15\u4e3a 2<\/p>\r\n\r\n
# \u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u65b0\u4ee3\u7801<\/p>\r\n
lines.insert(line_number, new_code)<\/p>\r\n\r\n
# \u5199\u56de\u4fee\u6539\u540e\u7684\u5185\u5bb9<\/p>\r\n
with open(filename, 'w') as file:<\/p>\r\n
    file.writelines(lines)<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u65b0\u4ee3\u7801\u6dfb\u52a0\u5230\u6307\u5b9a\u884c\u540e\uff0c\u4f7f\u7528 `writelines()` \u65b9\u6cd5\u5c06\u6240\u6709\u884c\u5199\u56de\u5230\u6587\u4ef6\u4e2d\u3002<\/p>\n<\/p>\n
\n
4. \u5904\u7406\u5f02\u5e38\u548c\u9519\u8bef<\/h3>\n<\/p>\n
\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u5e38\u89c1\u7684\u5f02\u5e38\u60c5\u51b5\u5305\u62ec\u6587\u4ef6\u672a\u627e\u5230\u3001\u8bfb\u53d6\u9519\u8bef\u7b49\u3002\u4e3a\u4e86\u63d0\u9ad8\u4ee3\u7801\u7684\u9c81\u68d2\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528 `try…except` \u8bed\u53e5\u3002\u4f8b\u5982\uff0c\u5728\u6253\u5f00\u6587\u4ef6\u65f6\uff0c\u6dfb\u52a0\u9519\u8bef\u5904\u7406\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
try:<\/p>\r\n
    with open(filename, 'r') as file:<\/p>\r\n
        lines = file.readlines()<\/p>\r\n
except FileNotFoundError:<\/p>\r\n
    print(f\"\u6587\u4ef6 {filename} \u672a\u627e\u5230.\")<\/p>\r\n
except Exception as e:<\/p>\r\n
    print(f\"\u53d1\u751f\u9519\u8bef: {e}\")<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u7a0b\u5e8f\u5c06\u66f4\u52a0\u7a33\u5b9a\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u7b80\u5355\u7684\u9519\u8bef\u800c\u5d29\u6e83\u3002<\/p>\n<\/p>\n
\n
5. \u5982\u4f55\u786e\u4fdd\u4ee3\u7801\u7684\u6709\u6548\u6027\uff1f<\/h3>\n<\/p>\n
\u5728\u63d2\u5165\u4ee3\u7801\u4e4b\u540e\uff0c\u6709\u5fc5\u8981\u9a8c\u8bc1\u4f60\u7684\u64cd\u4f5c\u662f\u5426\u6210\u529f\u3002\u4e00\u4e2a\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u5c06\u6587\u4ef6\u5185\u5bb9\u91cd\u65b0\u8bfb\u53d6\u5e76\u6253\u5370\u51fa\u6765\u3002\u4ee5\u4e0b\u662f\u8bc4\u4f30\u6587\u4ef6\u5185\u5bb9\u6709\u6548\u6027\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
with open(filename, 'r') as file:<\/p>\r\n
    updated_lines = file.readlines()<\/p>\r\n
    for line in updated_lines:<\/p>\r\n
        print(line, end='')<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u5feb\u901f\u786e\u8ba4\u4f60\u7684\u4ee3\u7801\u662f\u5426\u5df2\u7ecf\u6210\u529f\u6dfb\u52a0\u5230\u6587\u4ef6\u7684\u6307\u5b9a\u884c\u3002<\/p>\n<\/p>\n
\n
6. \u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5b9a\u4f4d\u5230\u7279\u5b9a\u884c\uff1f<\/h3>\n<\/p>\n
\u53ef\u4ee5\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u641c\u7d22\u548c\u5339\u914d\u6587\u672c\u3002\u8fd9\u53ef\u4ee5\u5e2e\u52a9\u4f60\u627e\u5230\u5305\u542b\u7279\u5b9a\u4fe1\u606f\u7684\u884c\u3002<\/b>\u4f7f\u7528 Python \u7684 `re` \u6a21\u5757\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n
import re<\/p>\r\n\r\n
for i, line in enumerate(lines):<\/p>\r\n
    if re.search(r'\u7279\u5b9a\u5185\u5bb9', line):  <\/p>\r\n
        line_number = i<\/p>\r\n
        break<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c06\u904d\u5386\u6bcf\u4e00\u884c\uff0c\u627e\u5230\u5305\u542b\u201c\u7279\u5b9a\u5185\u5bb9\u201d\u7684\u884c\u5e76\u8bb0\u5f55\u884c\u53f7\uff0c\u4e00\u65e6\u627e\u5230\u4fbf\u53ef\u4ee5\u63d2\u5165\u65b0\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\n
7. \u5982\u4f55\u5904\u7406\u5927\u578b\u6587\u4ef6\u7684\u8bfb\u53d6\u548c\u63d2\u5165\u64cd\u4f5c\uff1f<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u5927\u578b\u6587\u4ef6\uff0c\u53ef\u80fd\u4e0d\u9002\u5408\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u5185\u5bb9\u3002\u53ef\u4ee5\u8003\u8651\u5206\u5757\u8bfb\u53d6\u3002<\/b>\u8fd9\u6837\u53ef\u4ee5\u6709\u6548\u907f\u514d\u5185\u5b58\u5360\u7528\u8fc7\u9ad8\u7684\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684\u5b9e\u73b0\u601d\u8def\uff1a<\/p>\n<\/p>\n
with open(filename, 'r') as file:<\/p>\r\n
    for i, line in enumerate(file):<\/p>\r\n
        if i == line_number:<\/p>\r\n
            print(\"\u63d2\u5165\u65b0\u884c\")<\/p>\r\n
            # \u63d2\u5165\u65b0\u4ee3\u7801\u903b\u8f91<\/p>\r\n
        else:<\/p>\r\n
            # \u5904\u7406\u5176\u4ed6\u884c<\/p>\r\n
<\/code><\/pre>\n<\/p>\n
\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u9010\u884c\u8bfb\u53d6\uff0c\u964d\u4f4e\u5185\u5b58\u4f7f\u7528\uff0c\u5e76\u5728\u9700\u8981\u65f6\u8fdb\u884c\u63d2\u5165\u3002<\/p>\n<\/p>\n
\n
8. \u8fd8\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u5e93\u5417\uff1f<\/h3>\n<\/p>\n
\u5f53\u7136\uff0c\u9664\u4e86 Python \u5185\u7f6e\u7684\u6587\u4ef6\u64cd\u4f5c\u65b9\u5f0f\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u5e93\u53ef\u4ee5\u5b8c\u6210\u76f8\u4f3c\u7684\u4efb\u52a1\uff0c\u50cf `fileinput` \u548c `pandas` \u7b49\u5e93\u90fd\u63d0\u4f9b\u4e86\u66f4\u5f3a\u5927\u7684\u529f\u80fd\u3002<\/b>\u4f8b\u5982\uff0c`fileinput` \u5e93\u5141\u8bb8\u4f60\u5bf9\u591a\u4e2a\u6587\u4ef6\u8fdb\u884c\u6279\u91cf\u4fee\u6539\uff0c\u800c `pandas` \u5219\u9002\u5408\u4e8e\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u3002\u4f7f\u7528\u8fd9\u4e9b\u5e93\u53ef\u4ee5\u4f7f\u4f60\u7684\u4ee3\u7801\u66f4\u7b80\u6d01\u53ef\u8bfb\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
1. \u4f7f\u7528 Python \u64cd\u4f5c\u6587\u4ef6\u7684\u57fa\u7840 \u5728\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c\u65f6\uff0cPython \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8f7b\u677e\u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6\u3002\u7279\u522b l\u00e0\uff0c\u5bf9\u4e8e\u8981\u5728\u6307\u5b9a\u884c\u6dfb\u52a0\u4ee3\u7801\u7684\u64cd\u4f5c\uff0c\u901a\u5e38\u6d89\u53ca\u5230\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u5b9a\u4f4d\u5230\u7279\u5b9a\u884c\uff0c\u7136\u540e\u518d\u8fdb\u884c\u4fee\u6539\u3002Python \u7684\u5185\u7f6e\u51fd\u6570\u975e\u5e38\u65b9…<\/p>\n","protected":false},"author":1,"featured_media":707,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-baike"],"_links":{"self":[{"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/posts\/706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/comments?post=706"}],"version-history":[{"count":1,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/posts\/706\/revisions"}],"predecessor-version":[{"id":709,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/posts\/706\/revisions\/709"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/media\/707"}],"wp:attachment":[{"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/media?parent=706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/categories?post=706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/tags?post=706"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.ddosidc.com\/wp\/wp-json\/wp\/v2\/topic?post=706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}