{"id":5350,"date":"2024-09-18T19:01:03","date_gmt":"2024-09-18T11:01:03","guid":{"rendered":""},"modified":"2024-09-18T19:01:03","modified_gmt":"2024-09-18T11:01:03","slug":"python\u8bfb\u53d6\u6587\u4ef6\u4e00\u884c\u7684\u64cd\u4f5c_python\u96f6\u57fa\u7840\u600e\u4e48\u5b66","status":"publish","type":"post","link":"https:\/\/mushiming.com\/5350.html","title":{"rendered":"python\u8bfb\u53d6\u6587\u4ef6\u4e00\u884c\u7684\u64cd\u4f5c_python\u96f6\u57fa\u7840\u600e\u4e48\u5b66"},"content":{"rendered":"

\"python\u8bfb\u53d6\u6587\u4ef6\u4e00\u884c\u7684\u64cd\u4f5c_python\u96f6\u57fa\u7840\u600e\u4e48\u5b66<\/p>\n

python\u8bfb\u53d6\u6587\u4ef6\u7684\u6307\u5b9a\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u65b9\u6cd5<\/p>\n

1\u3001os.mknod(\u201ctest.txt\u201d) #\u521b\u5efa\u7a7a\u6587\u4ef6<\/p>\n

2\u3001fp = open(\u201ctest.txt\u201d,w) #\u76f4\u63a5\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\uff0c\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u5219\u521b\u5efa\u6587\u4ef6<\/p>\n

3\u3001open \u6a21\u5f0f<\/p>\n

\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\u5c31\u662f\u8bfb\u53d6\u6587\u4ef6\u7684\u6307\u5b9a\u884c\u5185\u5bb9\uff0c\u90a3\u4e48\u8be5\u5982\u4f55\u5b9e\u73b0\u7684\uff1fwith open('a.log', 'r') as fp:<\/p>\n

lines = fp.readlines()<\/p>\n

last_line = lines[-1]<\/p>\n

\u5373\u4f7f\u4e0d\u8003\u8651\u5f02\u5e38\u5904\u7406\u7684\u95ee\u9898\uff0c\u8fd9\u4e2a\u4ee3\u7801\u4e5f\u4e0d\u5b8c\u7f8e\uff0c\u56e0\u4e3a\u5982\u679c\u6587\u4ef6\u5f88\u5927\uff0clines = fp.readlines()\u4f1a\u9020\u6210\u5f88\u5927\u7684\u65f6\u95f4\u548c\u7a7a\u95f4\u5f00\u9500\u3002<\/p>\n

\u89e3\u51b3\u7684\u601d\u8def\u662f\u7528\u5c06\u6587\u4ef6\u6307\u9488\u5b9a\u4f4d\u5230\u6587\u4ef6\u5c3e\uff0c\u7136\u540e\u4ece\u6587\u4ef6\u5c3e\u8bd5\u63a2\u51fa\u4e00\u884c\u7684\u957f\u5ea6\uff0c\u4ece\u800c\u8bfb\u53d6\u6700\u540e\u4e00\u884c\u3002\u4ee3\u7801\u5982\u4e0b\uff1adef __get_last_line(self, filename):<\/p>\n

\"\"\"<\/p>\n

get last line of a file<\/p>\n

:param filename: file name<\/p>\n

:return: last line or None for empty file<\/p>\n

\"\"\"<\/p>\n

try:<\/p>\n

filesize = os.path.getsize(filename)<\/p>\n

if filesize == 0:<\/p>\n

return None<\/p>\n

else:<\/p>\n

with open(filename, \u0003<\/p>\n","protected":false},"excerpt":{"rendered":"python\u8bfb\u53d6\u6587\u4ef6\u4e00\u884c\u7684\u64cd\u4f5c_python\u96f6\u57fa\u7840\u600e\u4e48\u5b66python\u8bfb\u53d6\u6587\u4ef6\u7684\u6307\u5b9a\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u65b9\u6cd51\u3001os.mknod(\u201ctest.txt\u201d)#\u521b\u5efa\u7a7a\u6587...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/5350"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=5350"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/5350\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=5350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=5350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=5350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}