{"id":20152,"date":"2018-03-13T11:08:00","date_gmt":"2018-03-13T02:08:00","guid":{"rendered":"http:\/\/w3devlabs.net\/wp\/?p=20152"},"modified":"2018-03-12T19:09:03","modified_gmt":"2018-03-12T10:09:03","slug":"%ed%8c%8c%ec%9d%b4%ec%8d%ac-python-os-path-%ea%b8%b0%ec%b4%88-%ec%a0%95%eb%a6%ac","status":"publish","type":"post","link":"http:\/\/w3devlabs.net\/wp\/?p=20152","title":{"rendered":"\ud30c\uc774\uc36c Python – OS.PATH \uae30\ucd08 \uc815\ub9ac"},"content":{"rendered":"

\ud30c\uc774\uc36c Python – OS.PATH \uae30\ucd08 \uc815\ub9ac<\/font><\/span><\/p>\n


<\/p>\n

>>> sys.modules.keys()<\/font><\/span>
<\/span><\/font>\ud604\uc7ac \uc138\uc158, \ub610\ub294 \ud504\ub85c\uadf8\ub7a8\uc548\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \ubaa8\ub4e0 \ubaa8\ub4c8\uc744 \ubcf4\uc5ec\uc900\ub2e4.<\/font><\/span><\/p>\n


<\/p>\n

<\/span>
<\/span>
<\/span>>>> sys.getrefcount(object)<\/font><\/span>

<\/span><\/p>\n

<\/span>
<\/span>
<\/span>>>> sys.exc_info()<\/font><\/span>
<\/span><\/font>returns a tuple with the latest exception’s type, value, and traceback object<\/font><\/span><\/p>\n


<\/p>\n

<\/span>
<\/span>
<\/span>>>> try:<\/font><\/span>
<\/span>…     raise IndexError<\/span>
<\/span>… except:<\/span>
<\/span>…     print(sys.exc_info())<\/span>
<\/span>(<class ‘IndexError’>, IndexError(), <traceback object at 0x00BAE8C8>)<\/span>
<\/span> \uccab\ubc88\uc9f8, \ub450\ubc88\uc9f8\ub294 directly print \ud574\ub3c4 \uad1c\ucc2e\uace0<\/span>
<\/span>\uc138\ubc88\uc9f8\ub294 traceback module \uc744 \uc0ac\uc6a9\ud574\uc11c \ucc98\ub9ac\ud55c\ub2e4.<\/span>
<\/span>
<\/span>>>> import traceback, sys<\/span>
<\/span>>>> def grail(x):<\/span>
<\/span>…     raise TypeError(‘already got one’)<\/span>
<\/span>>>> try:<\/span>
<\/span>…     grail(‘arthur’)<\/span>
<\/span>… except:<\/span>
<\/span>…     exc_info = sys.exc_info()<\/span>
<\/span>…     print(exc_info[0])<\/span>
<\/span>…     print(exc_info[1])<\/span>
<\/span>…     traceback.print_tb(exc_info[2])<\/span>
<\/span>…<\/span>
<\/span><class ‘TypeError’><\/span>
<\/span>already got one<\/span>
<\/span>  File “<stdin>”, line 2, in <module><\/span>
<\/span>  File “<stdin>”, line 2, in grail<\/span>
<\/span>========================================================<\/span>
<\/span>>>> os.getpid()<\/span>
<\/span>3744<\/span>
<\/span>\uc720\ub2c8\ud06c\ud55c \ud504\ub85c\uc138\uc2a4 ID\ub97c \ubcf4\uc5ec\uc900\ub2e4.<\/span>
<\/span>os.getpid function gives the calling process’s process ID <\/span>
<\/span>(a unique system-defiend identifier for a running program, useful for process control and unique name creation)<\/span>
<\/span>
<\/span>
<\/span>>>> os.getcwd()<\/span>
<\/span>‘E:\\\\view\\\\Git\\\\Python\u2019<\/span>
<\/span><\/font>Current Working Directory \ub97c \ubcf4\uc5ec\uc900\ub2e4.<\/font><\/span>

<\/span><\/p>\n

<\/span>
<\/span>
<\/span>>>> os.path.isdir(r’c:\\python36′)<\/font><\/span><\/p>\n


<\/p>\n

<\/span><\/p>\n


<\/span>True<\/font><\/span>
<\/span>>>> os.path.isdir(r’c:\\awfewef’)<\/span>
<\/span>False<\/span>
<\/span>>>> os.path.isfile(r’c:\\python36\\python.exe’)<\/span>
<\/span>True<\/span>
<\/span>>>> os.path.isfile(r’c:\\python36\\python’)<\/span>
<\/span>False<\/span>
<\/span>>>> os.path.isfile(r’c:\\python36\\afwef’)<\/span>
<\/span>False<\/span>
<\/span>\ud3f4\ub354\uc778\uc9c0 \ud30c\uc77c\uc778\uc9c0.. type\ub610\ud55c \uccb4\ud06c\ud558\uba70<\/span>
<\/span>\ud3f4\ub354\ub098, \ud30c\uc77c\uc774 \uc2e4\uc7ac\ub85c \uc874\uc7ac\ud558\ub294\uc9c0 \ud655\uc778\ud55c\ub2e4.<\/span>
<\/span>\ub450\uac00\uc9c0 \ubaa8\ub450\ub9cc\uc871\ud574\uc57c True\uc774\ub2e4.<\/span>
<\/span>>>> os.path.exists(r’c:\\python36′)<\/span>
<\/span>True<\/span>
<\/span>>>> os.path.exists(r’c:\\python36\\python.exe’)<\/span>
<\/span>True<\/span>
<\/span>>>> os.path.exists(r’c:\\python36\\asdf’)<\/span>
<\/span>False<\/span>
<\/span>>>> os.path.exists(r’c:\\python36\\ss.exe’)<\/span>
<\/span>False<\/span>
<\/span>os.path.exists \ub294 \uc874\uc7ac\ud558\ub294\uc9c0 \ud655\uc778\ud55c\ub2e4. (\ud30c\uc77c, \ud3f4\ub354..)<\/span>
<\/span>
<\/span>
<\/span>>>> os.path.getsize(r’c:\\python36′)<\/span>
<\/span>0<\/span>
<\/span>>>> os.path.getsize(r’c:\\python36\\python.exe’)<\/span>
<\/span>97944<\/span>
<\/span><\/font>\ud30c\uc77c\uc758 \ud06c\uae30\ub97c \ubcf4\uc5ec\uc900\ub2e4.<\/font><\/span><\/p>\n


<\/p>\n

<\/span>
<\/span>
<\/span>
<\/span>>>> os.path.split(r’c:\\temp\\test\\python\\hello.exe’)<\/font><\/span>
<\/span>(‘c:\\\\temp\\\\test\\\\python’, ‘hello.exe’)<\/span>
<\/span><\/font>\ud30c\uc77c\ubd80\ubd84\uacfc \ud3f4\ub354\ubd80\ubd84\uc744 \uc11c\ub85c \uc798\ub77c\uc900\ub2e4.<\/font><\/span><\/p>\n

<\/span>
<\/span>>>> os.path.join(r’c:\\temp’, ‘hello.exe’)<\/font><\/span>
<\/span>‘c:\\\\temp\\\\hello.exe’<\/span>
<\/span><\/font>\uc11c\ub85c \ud569\uce68.. <\/font><\/span><\/p>\n

<\/span><\/p>\n


<\/p>\n

<\/span><\/p>\n

\ub9ac\ub205\uc2a4\uc5d0\uc11c\ub294 \ub9ac\ub205\uc2a4\uc5d0 \ub9de\ucdb0\uc11c \ud569\uccd0\uc900\ub2e4.<\/font><\/span>
<\/span>>>> name = r’c:\\temp\\python\\data.txt’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.path.dirname(name), os.path.basename(name)<\/span>
<\/span>(‘c:\\\\temp\\\\python’, ‘data.txt’)<\/span>
<\/span>\ud3f4\ub354, \ud30c\uc77c\uc744 \ubcf4\uc5ec\uc900\ub2e4. \ud30c\uc77c\uc774 \uc5c6\uac70\ub098.. \ud615\uc2dd\uc5d0 \ub9de\uc9c0 \uc54a\uc73c\uba74 \uc544\ubb34\uac83\ub3c4 \uc548\ub098\uc628\ub2e4.<\/span>
<\/span>
<\/span>>>> os.path.splitext(name)<\/span>
<\/span>(‘c:\\\\temp\\\\python\\\\data’, ‘.txt’)<\/span>
<\/span>\ud655\uc7a5\uc790\ub9cc \ub530\ub85c \ub5a8\uc5b4\ub728\ub9b0\ub2e4.<\/span>
<\/span>
<\/span>
<\/span>>>> pathname = r’c:\\PP4thEd\\Examples\\PP4E\\pyDemos.pyw’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.path.split(pathname)<\/span>
<\/span>(‘c:\\\\PP4thEd\\\\Examples\\\\PP4E’, ‘pyDemos.pyw’)<\/span>
<\/span>>>><\/span>
<\/span>>>> pathname.split(os.sep)<\/span>
<\/span>[‘c:’, ‘PP4thEd’, ‘Examples’, ‘PP4E’, ‘pyDemos.pyw’]<\/span>
<\/span>>>><\/span>
<\/span>>>> os.sep.join(pathname.split(os.sep))<\/span>
<\/span>‘c:\\\\PP4thEd\\\\Examples\\\\PP4E\\\\pyDemos.pyw’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.sep<\/span>
<\/span>‘\\\\’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.path.join(*pathname.split(os.sep))<\/span>
<\/span>‘c:PP4thEd\\\\Examples\\\\PP4E\\\\pyDemos.pyw’<\/span>
<\/span>\ub9c8\uc9c0\ub9c9 \uacb0\uacfc\ubb3c\uc5d0 \uc8fc\ubaa9\ud560 \ud544\uc694\uac00 \uc788\ub2e4.<\/span>
<\/span>c:\\ \uc774\uac8c \uc544\ub2c8\ub77c c: \uc774\ub807\uac8c \ub098\uc654\ub2e4.<\/span>
<\/span>
<\/span>
<\/span>
<\/span>>>> mixed<\/span>
<\/span>‘C;\\\\\\\\temp\\\\\\\\public\/files\/index.html’<\/span>
<\/span>>>> os.path.normpath(mixed)<\/span>
<\/span>‘C;\\\\temp\\\\public\\\\files\\\\index.html’<\/span>
<\/span>\ub9ac\ub205\uc2a4\uc640 \uc708\ub3c4\uc6b0 \ub514\ub809\ud1a0\ub9ac \ud3ec\ub9f7\uc774 \uc11e\uc774\uac70\ub098, \uc798\ubabb \uc368\uc84c\uc744\ub54c.. <\/span>
<\/span>\uace0\uce58\ub294 \ubc29\ubc95.<\/span>
<\/span>
<\/span>
<\/span>
<\/span>>>> os.chdir(r’c:\\python36′)<\/span>
<\/span>>>> os.getcwd()<\/span>
<\/span>‘c:\\\\python36’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.chdir(r’e:\\\\’)<\/span>
<\/span>>>> os.getcwd()<\/span>
<\/span>‘e:\\\\’<\/span>
<\/span>\ud3f4\ub354 \uc774\ub3d9\ud558\ub294 \ubc29\ubc95 COOL!!<\/span>
<\/span>\uc815\ud655\ud558\uac8c \ub9d0\ud558\uba74 current working directory\ub97c \uc774\ub3d9\ud558\ub294 \uac70\uc784<\/span>
<\/span>
<\/span>
<\/span>
<\/span>>>> os.chdir(r’e:\\@work’)<\/span>
<\/span>>>> os.getcwd()<\/span>
<\/span>‘e:\\\\@work’<\/span>
<\/span>>>><\/span>
<\/span>>>> os.path.abspath(‘temp’)<\/span>
<\/span>‘e:\\\\@work\\\\temp’<\/span>
<\/span>>>> os.path.abspath(‘temp\\hello.txt’)<\/span>
<\/span>‘e:\\\\@work\\\\temp\\\\hello.txt’<\/span>
<\/span>>>> os.path.abspath(r’..\\temp\\hello.txt’)<\/span>
<\/span>‘e:\\\\temp\\\\hello.txt’<\/span>
<\/span>\ud604\uc7ac \ud3f4\ub354\uc5d0 \uc0c8\ub85c\uc6b4 \ub514\ub809\ud1a0\ub9ac\ub098, \ud30c\uc77c\uba85\ub4f1\uc744 \ubd99\uc774\ub294 \ubc29\ubc95<\/span>
<\/span>\uc2e4\uc81c\ub85c \uc788\uc744 \ud544\uc694\ub294 \uc5c6\ub2e4.<\/span>
<\/span>\ub9c8\uc9c0\ub9c9 \uc608\uc81c\ub97c \ubcf4\uba74.. “..” \uc774 \uc788\ub294\ub370..<\/span>
<\/span>\uc0c1\uc704 \ud3f4\ub354\ub85c \uc774\ub3d9\ud560\uc218 \uc788\ub2e4.<\/span>
<\/span>
<\/span>
<\/span><\/font>\ucd9c\ucc98: http:\/\/chess72.tistory.com\/132 [\uac70\uc6b8\uc18d \ud56d\ud574\uc77c\uc9c0]<\/font><\/span><\/p>\n


<\/p>\n

\ucd9c\ucc98\uc5d0\uc11c \uac00\uc838\uc640\uc11c \ucea1\uccd0\ud654\uba74 \uba87\uac1c \ucd94\uac00\ud558\uc600\uc2b5\ub2c8\ub2e4. <\/font><\/span><\/p>\n


<\/p>\n","protected":false},"excerpt":{"rendered":"

\ud30c\uc774\uc36c Python – OS.PATH \uae30\ucd08 \uc815\ub9ac >>> sys.modules.keys()\ud604\uc7ac \uc138\uc158, \ub610\ub294 \ud504\ub85c\uadf8\ub7a8\uc548\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \ubaa8\ub4e0 \ubaa8\ub4c8\uc744 \ubcf4\uc5ec\uc900\ub2e4. >>> sys.getrefcount(object) >>> sys.exc_info()returns a tuple with the latest exception’s type, value, and traceback object >>> try:…     raise IndexError… except:…     print(sys.exc_info())(<class ‘IndexError’>, IndexError(), <traceback object at 0x00BAE8C8>) \uccab\ubc88\uc9f8, \ub450\ubc88\uc9f8\ub294 directly print \ud574\ub3c4 \uad1c\ucc2e\uace0\uc138\ubc88\uc9f8\ub294 traceback module \uc744 \uc0ac\uc6a9\ud574\uc11c \ucc98\ub9ac\ud55c\ub2e4.>>> import traceback, … <\/p>\n

\ub354 \ubcf4\uae30 “\ud30c\uc774\uc36c Python – OS.PATH \uae30\ucd08 \uc815\ub9ac”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[5836],"tags":[24057,16211,5625],"class_list":["post-20152","post","type-post","status-publish","format-standard","hentry","category-5836","tag-os-path","tag-python","tag-5625","entry"],"_links":{"self":[{"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/20152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20152"}],"version-history":[{"count":1,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/20152\/revisions"}],"predecessor-version":[{"id":20153,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/20152\/revisions\/20153"}],"wp:attachment":[{"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20152"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w3devlabs.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}