“`” \u673a\u5668\u7801\uff0c\u5b66\u540d\u673a\u5668\u8bed\u8a00\u6307\u4ee4\uff0c\u6709\u65f6\u4e5f\u88ab\u79f0\u4e3a\u539f\u751f\u7801\uff0c\u662f\u7535\u8111\u7684CPU\u53ef\u76f4\u63a5\u89e3\u8bfb\u7684\u6570\u636e\u3002<\/p>\n
\u5b57\u8282\u7801\u662f\u4e00\u79cd\u4e2d\u95f4\u72b6\u6001\uff08\u4e2d\u95f4\u7801\uff09\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801\uff08\u6587\u4ef6\uff09\u3002\u9700\u8981\u76f4\u8bd1\u5668\u8f6c\u8bd1\u540e\u624d\u80fd\u6210\u4e3a\u673a\u5668\u7801\u3002<\/p>\n
<pre><code>\u4ec0\u4e48\u662f\u673a\u5668\u7801<\/p>\n
\u673a\u5668\u7801(machine code)\uff0c\u5b66\u540d\u673a\u5668\u8bed\u8a00\u6307\u4ee4\uff0c\u6709\u65f6\u4e5f\u88ab\u79f0\u4e3a\u539f\u751f\u7801\uff08Native Code\uff09\uff0c\u662f\u7535\u8111\u7684CPU\u53ef\u76f4\u63a5\u89e3\u8bfb\u7684\u6570\u636e\u3002
\n\u901a\u5e38\u610f\u4e49\u4e0a\u6765\u7406\u89e3\u7684\u8bdd\uff0c\u673a\u5668\u7801\u5c31\u662f\u8ba1\u7b97\u673a\u53ef\u4ee5\u76f4\u63a5\u6267\u884c\uff0c\u5e76\u4e14\u6267\u884c\u901f\u5ea6\u6700\u5feb\u7684\u4ee3\u7801\u3002
\n\u603b\u7ed3\uff1a\u673a\u5668\u7801\u662f\u7535\u8111CPU\u76f4\u63a5\u8bfb\u53d6\u8fd0\u884c\u7684\u673a\u5668\u6307\u4ee4\uff0c\u8fd0\u884c\u901f\u5ea6\u6700\u5feb\uff0c\u4f46\u662f\u975e\u5e38\u6666\u6da9\u96be\u61c2\uff0c\u4e5f\u6bd4\u8f83\u96be\u7f16\u5199<\/p>\n
\u4ec0\u4e48\u662f\u5b57\u8282\u7801
\n\u5b57\u8282\u7801\uff08Bytecode\uff09\u662f\u4e00\u79cd\u5305\u542b\u6267\u884c\u7a0b\u5e8f\u3001\u7531\u4e00\u5e8f\u5217 op \u4ee3\u7801\/\u6570\u636e\u5bf9 \u7ec4\u6210\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u5b57\u8282\u7801\u662f\u4e00\u79cd\u4e2d\u95f4\u7801\uff0c\u5b83\u6bd4\u673a\u5668\u7801\u66f4\u62bd\u8c61\uff0c\u9700\u8981\u76f4\u8bd1\u5668\u8f6c\u8bd1\u540e\u624d\u80fd\u6210\u4e3a\u673a\u5668\u7801\u7684\u4e2d\u95f4\u4ee3\u7801\u3002<\/p>\n
\u603b\u7ed3\uff1a\u5b57\u8282\u7801\u662f\u4e00\u79cd\u4e2d\u95f4\u72b6\u6001\uff08\u4e2d\u95f4\u7801\uff09\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801\uff08\u6587\u4ef6\uff09\u3002\u9700\u8981\u76f4\u8bd1\u5668\u8f6c\u8bd1\u540e\u624d\u80fd\u6210\u4e3a\u673a\u5668\u7801\u3002
\n<\/code><\/pre><\/p>\n
———–<\/p>\n
<pre><code>#is \u6bd4\u8f83\u7684\u662f\u5185\u5b58\u5730\u5740
\n#== \u6bd4\u8f83\u7684\u662f\u503c
\n# int \u5177\u6709\u8303\u56f4\uff1a-5—256
\n#\u5bf9\u4e8eint \u5c0f\u6570\u636e\u6c60
\n \u8303\u56f4\uff1a-5—-256 \u521b\u5efa\u7684\u76f8\u95f4\u7684\u6570\u5b57\uff0c\u90fd\u6307\u5411\u540c\u4e00\u4e2a\u5185\u5b58\u5730\u5740<\/p>\n
#\u5bf9\u4e8e\u5b57\u7b26\u4e32 \uff08\u9762\u8bd5\uff09
\n1\u3001\u5c0f\u6570\u636e\u6c60 \u5982\u679c\u6709\u7a7a\u683c\uff0c\u90a3\u6307\u5411\u4e24\u4e2a\u5185\u5b58\u5730\u5740\uff0c
\n2\u3001\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc7 20
\n3\u3001\u4e0d\u80fd\u7528\u7279\u6b8a\u5b57\u7b26<\/p>\n
i = 'a'*20
\nj = 'a'*20
\nprint(i is j) # True<\/p>\n
i = ""a""*21
\nj = ""a""*21
\nprint(i is j) # False<\/p>\n
\u5173\u4e8e\u7f16\u7801\u6240\u5360\u5b57\u8282
\nunicode\uff1a \u6240\u6709\u5b57\u7b26\uff08\u65e0\u8bba\u82f1\u6587\u3001\u4e2d\u6587\u7b49\uff09 1\u4e2a\u5b57\u7b26\uff1a2\u4e2a\u5b57\u8282
\ngbk\uff1a\u4e00\u4e2a\u5b57\u7b26\uff0c\u82f1\u65871\u4e2a\u5b57\u8282\uff0c\u4e2d\u6587\u4e24\u4e2a\u5b57\u8282
\nutf-8\uff1a\u82f1\u65871\u4e2a\u5b57\u8282\u3001 \u6b27\u6d32\uff1a2\u4e2a\u5b57\u8282\uff0c \u4e9a\u6d32\uff1a3\u4e2a\u5b57\u8282<\/p>\n
\u5728utf-8\u4e2d\uff0c\u4e00\u4e2a\u4e2d\u6587\u5b57\u7b26\u5360\u75283\u4e2a\u5b57\u8282
\n\u5728gbk\u4e2d\u4e00\u4e2a\u6c49\u5b57\u5360\u75282\u4e2a\u5b57\u8282
\n\u9ece\u8bd7 = utf-8(6\u5b57\u8282)=48
\n\u9ece\u8bd7 = gbk(4\u5b57\u8282)=32<\/p>\n
\u5b57\u8282\u548c\u4f4d\u7684\u5173\u7cfb\u3002
\n\u3000\u3000#\u4e00\u4e2a\u5b57\u8282(byte) = 8 \u4f4d(bit)
\n\u3000\u3000# \u4f4d\u4e3a\u6700\u5c0f\u7684\u5355\u4f4d<\/p>\n
\u7b80\u8ff0\u53d8\u91cf\u547d\u540d\u89c4\u8303
\n\u3000\u3000#1\u3001\u4ee5\u5b57\u6bcd\uff0c\u6570\u5b57\uff0c\u4e0b\u5212\u7ebf\u4efb\u7531\u7ed3\u5408
\n\u3000\u3000#2\u3001\u4e0d\u80fd\u4ee5\u547d\u540d\u592a\u957f\uff0c\u4e0d\u4f7f\u7528\u62fc\u97f3\uff0c\u4e2d\u6587
\n\u3000\u3000#3\u3001\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934
\n\u3000\u3000#4\u3001\u4e0d\u80fd\u7528\u5173\u952e\u8bcd
\n<\/code><\/pre><\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u673a\u5668\u7801\uff0c\u5b66\u540d\u673a\u5668\u8bed\u8a00\u6307\u4ee4\uff0c\u6709\u65f6\u4e5f\u88ab\u79f0\u4e3a\u539f\u751f\u7801\uff0c\u662f\u7535\u8111\u7684CPU\u53ef\u76f4\u63a5\u89e3\u8bfb\u7684\u6570\u636e\u3002 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-41636","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/41636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=41636"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/41636\/revisions"}],"predecessor-version":[{"id":41637,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/41636\/revisions\/41637"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=41636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=41636"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=41636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}