{"id":406,"date":"2019-01-04T12:23:35","date_gmt":"2019-01-04T03:23:35","guid":{"rendered":"https:\/\/www.nblog09.com\/w\/?p=406"},"modified":"2021-06-12T13:14:24","modified_gmt":"2021-06-12T04:14:24","slug":"python-try","status":"publish","type":"post","link":"https:\/\/www.nblog09.com\/w\/2019\/01\/04\/python-try\/","title":{"rendered":"Python\u306etry\uff5eexcept\u3068\u4f8b\u5916\u51e6\u7406\u3068\u4f8b\u5916\u306e\u8a73\u7d30\u8868\u793a\u3001raise,assert,\u72ec\u81ea\u306e\u4f8b\u5916\u306e\u5b9a\u7fa9\u65b9\u6cd5\u307e\u3068\u3081"},"content":{"rendered":"

Python\u306e\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u672c\uff08try,except\uff09<\/strong><\/h2>\n

python\u306e\u4f8b\u5916\u51e6\u7406\u306ftry,except\u3092\u5229\u7528\u3059\u308b\u3002
\n\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u6587\u6cd5\u7684\u306b\u306f\u9593\u9055\u3044\u306a\u3044\u304c\u5b9f\u884c\u6642\u306b\u554f\u984c\u3092\u8d77\u3053\u3059\u30a8\u30e9\u30fc\u3067\u3001\u305d\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u4ee3\u66ff\u51e6\u7406\u3092\u7528\u610f\u3059\u308b<\/span>\u306e\u304c\u4f8b\u5916\u51e6\u7406\u3068\u8a00\u3046\u3002
\n\u4ee3\u8868\u7684\u306a\u3082\u306e\u3068\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308b<\/p>\n\n\n\n\n\n\n
FileNotFoundError<\/strong><\/td>\n\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u6307\u5b9a\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u30a8\u30e9\u30fc<\/td>\n<\/tr>\n
IndexError<\/strong><\/td>\n\u914d\u5217\u306a\u3069\u3067\u6307\u5b9a\u3057\u305f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u5024\u304c\u5b58\u5728\u3057\u306a\u3044\u30a8\u30e9\u30fc<\/td>\n<\/tr>\n
TypeError<\/strong><\/td>\n\u578b\u306b\u95a2\u3059\u308b\u30a8\u30e9\u30fc<\/td>\n<\/tr>\n
ZeroDivisoinError<\/strong><\/td>\n0\u3067\u5272\u308d\u3046\u3068\u3057\u305f\u3053\u3068\u306b\u3088\u308b\u30a8\u30e9\u30fc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b<\/p>\n

\n

\nExample
\n<\/h4>\n
    \n
  • \n\u4f8b\u5916\u51e6\u7406(try...except)\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\n<\/li>\n<\/ul>\n

    <\/p>\n

    \ntry: # try+:(\u30b3\u30ed\u30f3)<\/strong>
    \n    num = 10.0 \/ 0 # try\u306e\u5f8c\u306b\u3001\u30a4\u30f3\u30c7\u30f3\u30c8(\u7a7a\u767d4\u6587\u5b57)\u3092\u5165\u308c\u308b\u3068\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u3044\u304b\u30c1\u30a7\u30c3\u30af<\/strong>
    \nexcept ZeroDivisionError<\/span> as e: # try\u306e\u4e2d\u3067ZeroDivisionError(\u6570\u5024\u30920\u3067\u5272\u3063\u305f\u5834\u5408\u306b\u8d77\u3053\u308b\u4f8b\u5916)\u3001except\u306e\u4e2d\u3092\u5b9f\u884c<\/strong>
    \n    print(\"\u4f8b\u5916\u767a\u751f\") # \u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u5b9f\u884c<\/strong>
    \n    print('{} : {}'.format(type(e),e)) # \u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001<class 'ZeroDivisionError'> : float division by zero\u306e\u3088\u3046\u306b\u3069\u306e\u4f8b\u5916\u304b\u8868\u793a<\/strong>\n<\/div>\n
      \n
    • \n\u4f8b\u5916\u306e\u7d50\u679c\u3092\u8a73\u7d30\u306b\u8868\u793a\u3057\u305f\u3044\u5834\u5408\n<\/li>\n<\/ul>\n

      <\/p>\n

      \nfrom traceback import format_tb # traceback\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089format_tb\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30dd\u30fc\u30c8<\/strong><\/p>\n

      try<\/span>:
      \n    num = 10.0 \/ 0
      \nexcept ZeroDivisionError<\/span> as e:
      \n    print('{} : {}'.format(type(e),e))
      \n    print(format_tb(e.__traceback__)) # format_tb(e.__traceback__)\u3092print\u3059\u308b\u3068\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u3069\u306e\u884c\u3067\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u304b\u8868\u793a<\/span>\u3059\u308b<\/strong>\n<\/div>\n<\/div>\n

      Python\u306e\u4f8b\u5916\u51e6\u7406\u306e\u5fdc\u7528\uff08else,finally\uff09<\/strong><\/h2>\n

      python\u306e\u4f8b\u5916\u51e6\u7406\u3092\u8907\u6570\u3064\u306a\u3052\u308b\u3053\u3068\u3082\u3067\u304d\u308b<\/p>\n

      \n

      \nExample
      \n<\/h4>\n
        \n
      • \nexcept\u3092\u8907\u6570\u7e4b\u3052\u3066\u8a18\u8ff0\n<\/li>\n<\/ul>\n

        <\/p>\n

        \nfruits = ['apple', 'orange', 'grape']
        \ncount = 12<\/p>\n

        try:
        \n    fruit = fruits[2]
        \n    print(fruit + count)
        \nexcept IndexError<\/span> as e: # \u914d\u5217\u306b\u5b58\u5728\u3057\u306a\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408<\/span>\u306e\u4f8b\u5916<\/strong>
        \n    print('{} : {}'.format(type(e),e))
        \nexcept TypeError<\/span> as e: # \u6587\u5b57\u5217\u578b+\u6570\u5024\u578b\u7b49\u3001\u578b\u306e\u7570\u306a\u308b\u8a08\u7b97\u3057\u305f\u5834\u5408<\/span>\u306e\u4f8b\u5916<\/strong>
        \n    print('{} : {}'.format(type(e),e))
        \nexcept Exception<\/span> as e: # \u5168\u3066\u306e\u4f8b\u5916<\/span>\u3092\u30ad\u30e3\u30c3\u30c1<\/strong>
        \n    print('{} : {}'.format(type(e),e))\n<\/div>\n<\/div>\n

        else\/finally\u306e\u5229\u7528\u65b9\u6cd5<\/strong><\/div>\n
          \n
        • else\u306f\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c<\/strong>\u3001\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044<\/li>\n
        • finally\u306f\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u3082\u3001\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u3082\u5b9f\u884c\u3055\u308c\u308b<\/strong><\/li>\n<\/ul>\n

          \"\"<\/p>\n

          \n

          \nExample
          \n<\/h4>\n
            \n
          • \nelse, finally\u306e\u5229\u7528\u65b9\u6cd5\n<\/li>\n<\/ul>\n

            <\/p>\n

            \ntry:
            \n    num = 12 \/ 2
            \nexcept ZeroDivisionError<\/span> as e: # \u6570\u5f0f\u30670\u3067\u9664\u7b97\u3092\u884c\u3063\u305f\u5834\u5408\u306e\u4f8b\u5916(\u3053\u306e\u4f8b\u3067\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044)<\/strong>
            \n    print('{} : {}'.format(type(e),e))
            \nelse:
            \n    print(\"else\u304c\u5b9f\u884c\u3055\u308c\u307e\u3057\u305f\") # else\u306f\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u307f\u5b9f\u884c\u3055\u308c\u308b<\/span>(\u3053\u306e\u4f8b\u3067\u306f\u5b9f\u884c\u3055\u308c\u308b)<\/strong>
            \nfinally:
            \n    print(\"finally\u304c\u5b9f\u884c\u3055\u308c\u307e\u3057\u305f\") # finally\u306f\u4f8b\u5916\u306e\u767a\u751f\u6709\u7121\u306b\u95a2\u4fc2\u306a\u304f\u5b9f\u884c\u3055\u308c\u308b<\/span>(\u3053\u306e\u4f8b\u3067\u306f\u5b9f\u884c\u3055\u308c\u308b)<\/strong>\n<\/div>\n<\/div>\n

            raise\u3067\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b<\/strong><\/h2>\n

            python\u3067\u306f\u3001\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/p>\n

            \u4ee5\u4e0b\u306e\u3088\u3046\u306braise('\u30e1\u30c3\u30bb\u30fc\u30b8')\u3092\u5229\u7528\u3059\u308b<\/p>\n

            \n

            \nExample
            \n<\/h4>\n
              \n
            • \nraise\u306e\u5229\u7528\u65b9\u6cd5\n<\/li>\n<\/ul>\n

              <\/p>\n

              \ndef devide(a, b): # \u95a2\u6570\u306e\u5b9a\u7fa9<\/strong>
              \n    if(b == 0):
              \n        raise ZeroDivisionError('b\u306b0\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044')<\/span> # raise\u3092\u3059\u308b\u3068\u547c\u3073\u51fa\u3057\u5143\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u4f8b\u5916\u3092\u8fd4\u3059<\/strong>
              \n    else:
              \n        return a \/ b
              \ntry:
              \n    result = devide(10,0) # \u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3068\u3001ZeroDivisionError\u304c\u8fd4\u308b<\/strong>
              \nexcept ZeroDivisionError<\/span> as e:
              \n    print('{} : {}'.format(type(e), e)) # ZeroDivisionError\u304c\u767a\u751f\u3002<class 'ZeroDivisionError'> : \u300cb\u306b0\u3092\u8a2d\u5b9a\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u300d\u3068\u8868\u793a<\/strong>\n<\/div>\n<\/div>\n

              assert\u306f\u3001\u30c6\u30b9\u30c8\u306a\u3069\u3067\u5024\u3092\u78ba\u8a8d\u3057\u305f\u3044\u6642\u306b\u5229\u7528\u3059\u308b\u3002
              \nassert \u6761\u4ef6\u5f0f\u3001\u6761\u4ef6\u5f0f\u304cFalse\u306e\u6642\u306b\u8868\u793a\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8<\/div>\n

              \u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3001\u6761\u4ef6\u5f0f\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u30c6\u30b9\u30c8\u3059\u308b\u3002<\/p>\n

              \n

              \nExample
              \n<\/h4>\n
                \n
              • \nraise\u306e\u5229\u7528\u65b9\u6cd5\n<\/li>\n<\/ul>\n

                <\/p>\n

                \ndef test_marumaru(small, big):
                \n    try:
                \n        assert small > big, \"small\u306fbig\u3088\u308a\u5c0f\u3055\u304f\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\" # small>big\u306e\u5834\u5408\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a<\/strong>
                \n    except AssertionError<\/span> as e:
                \n        print(\"\u30c6\u30b9\u30c8\u7d42\u4e86\")\n<\/div>\n<\/div>\n

                \u4f8b\u5916\u306e\u72ec\u81ea\u5b9a\u7fa9\u306f\u3001Exception\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b <\/p>\n

                \n

                \nExample
                \n<\/h4>\n
                  \n
                • \nraise\u306e\u5229\u7528\u65b9\u6cd5\n<\/li>\n<\/ul>\n

                  <\/p>\n

                  \nclass MyException(Exception): # Exception\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210<\/strong>
                  \n    pass<\/p>\n

                  raise MyException('\u30e1\u30c3\u30bb\u30fc\u30b8') # \u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u305f\u3044\u5834\u6240\u3067raise\u3092\u5229\u7528\u3059\u308b<\/strong>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                  Python\u306e\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u672c\uff08try,except\uff09 python\u306e\u4f8b\u5916\u51e6\u7406\u306ftry,except\u3092\u5229\u7528\u3059\u308b\u3002 \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u6587\u6cd5\u7684\u306b\u306f\u9593\u9055\u3044\u306a\u3044\u304c\u5b9f\u884c\u6642\u306b\u554f\u984c\u3092\u8d77\u3053\u3059\u30a8\u30e9\u30fc\u3067\u3001\u305d\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u4ee3\u66ff\u51e6\u7406\u3092\u7528\u610f\u3059\u308b […]<\/p>\n","protected":false},"author":1,"featured_media":411,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[9,219],"tags":[86,14,85,84,83],"class_list":{"0":"post-406","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-python","8":"category-it-programming","9":"tag-assert","10":"tag-python","11":"tag-raise","12":"tag-try","13":"tag-83","14":"entry"},"uagb_featured_image_src":{"full":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",1323,480,false],"thumbnail":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480-150x150.jpg",150,150,true],"medium":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480-300x109.jpg",300,109,true],"medium_large":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480-768x279.jpg",768,279,true],"large":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480-1024x372.jpg",1024,372,true],"1536x1536":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",1323,480,false],"2048x2048":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",1323,480,false],"home-middle":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",630,229,false],"home-top":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",750,272,false],"sidebar-thumbnail":["https:\/\/www.nblog09.com\/w\/wp-content\/uploads\/2019\/01\/startup-3373321__480.jpg",100,36,false]},"uagb_author_info":{"display_name":"9nmatsumoto","author_link":"https:\/\/www.nblog09.com\/w\/author\/9nmatsumoto\/"},"uagb_comment_info":1,"uagb_excerpt":"Python\u306e\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u672c\uff08try,except\uff09 python\u306e\u4f8b\u5916\u51e6\u7406\u306ftry,except\u3092\u5229\u7528\u3059\u308b\u3002…","_links":{"self":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/comments?post=406"}],"version-history":[{"count":37,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/406\/revisions"}],"predecessor-version":[{"id":3755,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/posts\/406\/revisions\/3755"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/media\/411"}],"wp:attachment":[{"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/media?parent=406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/categories?post=406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nblog09.com\/w\/wp-json\/wp\/v2\/tags?post=406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}