{"id":2195,"date":"2015-05-21T23:11:09","date_gmt":"2015-05-21T15:11:09","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=2195"},"modified":"2017-03-07T16:39:18","modified_gmt":"2017-03-07T08:39:18","slug":"%e7%b3%9f%e7%b3%95%e7%9a%84python%e7%bc%96%e7%a8%8b%e4%b9%a0%e6%83%af","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/2195.html","title":{"rendered":"\u7cdf\u7cd5\u7684Python\u7f16\u7a0b\u4e60\u60ef"},"content":{"rendered":"<pre class=\"lang:default decode:true\">#\u7cdf\u7cd5\u7684\u4ee3\u7801\u98ce\u683c\ntry:\n    do_something()\nexcept:\n    pass\n\n#\u503c\u5f97\u63d0\u5021\u7684\u4ee3\u7801\u98ce\u683c\ntry:\n    do_something()\nexcept ValueError:  # Catch some very specific exception - KeyError, ValueError, etc.\n    pass<\/pre>\n<pre class=\"lang:default decode:true \">#\u4f1a\u5f15\u53d1Exception\u7684\u51fd\u6570\u6837\u4f8b\ndef get_number():\n    return int('foo')<\/pre>\n<pre class=\"lang:default decode:true\">#\u5229\u7528logging\u6a21\u5757 [\u6700\u4f73\u5b9e\u8df5__\u4f7f\u7528\u9ed8\u8ba4Python\u5e93\u5df2\u7ecf\u63d0\u4f9b\u7684\u65b9\u6cd5\u800c\u4e0d\u662f\u81ea\u5df1\u53bb\u5199]\nimport logging\ntry:\n    x = get_number()\nexcept Exception as ex:\n    logging.exception('Caught an error')<\/pre>\n<pre class=\"lang:default decode:true\"># The Python 2.x version. It's a little less work.\nimport sys\nimport traceback\ndef log_traceback(ex, ex_traceback):\n    tb_lines = traceback.format_exception(ex.__class__, ex, ex_traceback)\n    tb_text = ''.join(tb_lines)\n    # I'll let you implement the ExceptionLogger class, and the timestamping.\n    exception_logger.log(tb_text)\ntry:\n    x = get_number()\nexcept Exception as ex:\n    # Here, I don't really care about the first two values.\n    # I just want the traceback.\n    _, _, ex_traceback = sys.exc_info()\n    log_traceback(ex, ex_traceback)<\/pre>\n<pre class=\"lang:default decode:true\"># The Python 3 version. It's a little less work.\nimport traceback\ndef log_traceback(ex):\n    tb_lines = traceback.format_exception(ex.__class__, ex, ex.__traceback__)\n    tb_text = ''.join(tb_lines)\n    # I'll let you implement the ExceptionLogger class, and the timestamping.\n    exception_logger.log(tb_text)\ntry:\n    x = get_number()\nexcept Exception as ex:\n    log_traceback(ex)<\/pre>\n<pre class=\"lang:default decode:true \">import sys\nimport traceback\ndef handle_exeception(e):\n    traceback.print_exc()\n    try:\n        raise Exception\n    except:\n        f = sys.exc_info()[2].tb_frame.f_back\n    print 'EXCEPTION|%s:%s:%d \"%s\"' %(f.f_code.co_filename, f.f_code.co_name, f.f_lineno, e)\n    return\n\ntry:\n    x = get_number()\nexcept Exception, e:\n    handle_exeception(e)<\/pre>\n<p>&nbsp;<\/p>\n<h6>\u82f1\u6587\u94fe\u63a5\uff1a<\/h6>\n<p><a href=\"https:\/\/realpython.com\/blog\/python\/the-most-diabolical-python-antipattern\/\" target=\"_blank\">https:\/\/realpython.com\/blog\/python\/the-most-diabolical-python-antipattern\/<\/a><\/p>\n<h6>\u76f8\u5173\u94fe\u63a5\uff1a<\/h6>\n<ul>\n<li><a href=\"https:\/\/docs.python.org\/2\/library\/logging.html#logging.exception\" target=\"_blank\">https:\/\/docs.python.org\/2\/library\/logging.html#logging.exception<\/a><\/li>\n<li><a href=\"https:\/\/docs.python.org\/2\/library\/traceback.html#traceback.print_exc\" target=\"_blank\">https:\/\/docs.python.org\/2\/library\/traceback.html#traceback.print_exc<\/a><\/li>\n<li><a href=\"https:\/\/docs.python.org\/2\/library\/sys.html#sys.exc_info\" target=\"_blank\">https:\/\/docs.python.org\/2\/library\/sys.html#sys.exc_info<\/a><\/li>\n<li>=<\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/4508849\/how-to-log-python-exception\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/4508849\/how-to-log-python-exception<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/20241478\/how-can-i-get-the-traceback-object-sys-exc-info2-same-as-sys-exc-traceba\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/20241478\/how-can-i-get-the-traceback-object-sys-exc-info2-same-as-sys-exc-traceba<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/8238360\/how-to-save-traceback-sys-exc-info-values-in-a-variable\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/8238360\/how-to-save-traceback-sys-exc-info-values-in-a-variable<\/a><\/li>\n<li>=<\/li>\n<li><a href=\"http:\/\/farmdev.com\/src\/secrets\/framehack\/index.html\" target=\"_blank\">http:\/\/farmdev.com\/src\/secrets\/framehack\/index.html<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/1140194\/in-python-how-do-i-obtain-the-current-frame\" target=\"_blank\">http:\/\/stackoverflow.com\/questions\/1140194\/in-python-how-do-i-obtain-the-current-frame<\/a><\/li>\n<li><a href=\"http:\/\/farmdev.com\/src\/secrets\/framehack\/#id4\">http:\/\/farmdev.com\/src\/secrets\/framehack\/#id4<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>#\u7cdf\u7cd5\u7684\u4ee3\u7801\u98ce\u683c try: do_something() except: pass #\u503c\u5f97\u63d0\u5021\u7684\u4ee3\u7801\u98ce\u683c tr [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,12],"tags":[518,8,394],"class_list":["post-2195","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","category-tools","tag-exception","tag-python","tag-try-catch"],"views":4256,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2195","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=2195"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2195\/revisions"}],"predecessor-version":[{"id":3246,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2195\/revisions\/3246"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=2195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=2195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=2195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}