{"id":10541,"date":"2021-12-29T15:28:57","date_gmt":"2021-12-29T09:58:57","guid":{"rendered":"https:\/\/pynative.com\/?p=10541"},"modified":"2021-12-29T15:31:54","modified_gmt":"2021-12-29T10:01:54","slug":"python-get-file-size","status":"publish","type":"post","link":"https:\/\/pynative.com\/python-get-file-size\/","title":{"rendered":"Python Check File Size"},"content":{"rendered":"\n<p>In this tutorial, you\u2019ll learn how to get file size in Python.<\/p>\n\n\n\n<p>Whenever we work with files, sometimes we need to check file size before performing any operation. For example, if you are trying to copy content from one file into another file. In this case, we can check if the file size is greater than 0 before performing the file copying operation.<\/p>\n\n\n\n<p>In this article, We will use the following&nbsp;<strong>three methods<\/strong>&nbsp;of an OS and pathlib module to get file size.<\/p>\n\n\n\n<p><strong>os.path module<\/strong>:<\/p>\n\n\n\n<ul><li><code>os.path.getsize('file_path')<\/code>: Return the file size in bytes.<\/li><li><code>os.stat(file).st_size<\/code>: Return the file size in bytes<\/li><\/ul>\n\n\n\n<p><strong>Pathlib module<\/strong>:<\/p>\n\n\n\n<ul><li><code>pathlib.Path('path').stat().st_size<\/code>: Return the file size in bytes.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-os-path-getsize-method-to-check-file-size\">os.path.getsize() Method to Check File Size<\/h2>\n\n\n\n<div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">For example, you want to\u00a0<a href=\"https:\/\/pynative.com\/python-read-file\/\">read a file<\/a>\u00a0to analyze the sales data to prepare a monthly report, but before performing this operation we want to check whether the file contains any data.<br\/><br\/>The\u00a0<a href=\"https:\/\/docs.python.org\/3\/library\/os.path.html\" target=\"_blank\" rel=\"noreferrer noopener\">os.path module<\/a>\u00a0has some valuable functions on pathnames. Here we will see how to use the\u00a0<code>os.path<\/code>\u00a0module to check the file size.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1640764382307\"><strong class=\"schema-how-to-step-name\">Important the os.path module<\/strong> <p class=\"schema-how-to-step-text\">This module helps us to work with file paths and directories in Python. Using this module, we can access and manipulate paths<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1640764531916\"><strong class=\"schema-how-to-step-name\">Construct File Path<\/strong> <p class=\"schema-how-to-step-text\">A file path defines the location of a file or folder in the computer system. There are two ways to specify a file path.<br\/><br\/><em><strong>Absolute path<\/strong><\/em>: which always begins with the root folder. The absolute path includes the complete directory list required to locate the file. For example,\u00a0<code>\/user\/Pynative\/data\/sales.txt<\/code>\u00a0is an absolute path to discover the sales.txt. All of the information needed to find the file is contained in the path string.<br\/><br\/><strong><em>Relative path<\/em><\/strong>: which is relative to the program\u2019s current working directory.<br\/><br\/>To maintain uniformity across the operating system,\u00a0<em>use the forward-slash<\/em>\u00a0(<code>\/<\/code>) to separate the path. It\u2019ll work across Windows, macOS, and Unix-based systems, including Linux.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1640764553292\"><strong class=\"schema-how-to-step-name\">Use os.path.getsize() function<\/strong> <p class=\"schema-how-to-step-text\">Use the <code>os.path.getsize('file_path')<\/code> function to check the file size. Pass the file name or file path to this function as an argument. <strong>This function returns file size in bytes<\/strong>. It raises <strong>OSError<\/strong> if the file does not exist or is inaccessible.<\/p> <\/li><\/ol><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Example To Get File Size<\/h3>\n\n\n<div class=\"hljstoolbar\"><pre id=\"code1\"  id=\"norun\" class=\"wp-block-code language-python\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> os.path\n\n<span class=\"hljs-comment\"># file to check<\/span>\nfile_path = <span class=\"hljs-string\">r'E:\/demos\/account\/sales.txt'<\/span>\n\nsz = os.path.getsize(file_path)\nprint(<span class=\"hljs-string\">f'The <span class=\"hljs-subst\">{file_path}<\/span> size is'<\/span>, sz, <span class=\"hljs-string\">'bytes'<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><button class=\"hljs-copy-button\" onclick=\"copy_code('code1', this);\"><i class=\"far fa-copy1\" aria-hidden=\"true\"><\/i><\/button><\/div>\n\n\n<p><strong>Output<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">E:\/demos\/account\/sales.txt size is 10560 bytes<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Get File Size in KB, MB, or GB<\/h3>\n\n\n\n<ul><li>First, get the file size using the getsize() function.<\/li><li>Next, convert bytes to KB or MB.<\/li><\/ul>\n\n\n\n<p>Use the following example to convert the file size in KB, MB, or GB.<\/p>\n\n\n<div class=\"hljstoolbar\"><pre id=\"code2\"  id=\"norun\" class=\"wp-block-code language-python\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> os.path\n\n<span class=\"hljs-comment\"># calculate file size in KB, MB, GB<\/span>\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title\">convert_bytes<\/span><span class=\"hljs-params\">(size)<\/span>:<\/span>\n    <span class=\"hljs-string\">\"\"\" Convert bytes to KB, or MB or GB\"\"\"<\/span>\n    <span class=\"hljs-keyword\">for<\/span> x <span class=\"hljs-keyword\">in<\/span> &#91;<span class=\"hljs-string\">'bytes'<\/span>, <span class=\"hljs-string\">'KB'<\/span>, <span class=\"hljs-string\">'MB'<\/span>, <span class=\"hljs-string\">'GB'<\/span>, <span class=\"hljs-string\">'TB'<\/span>]:\n        <span class=\"hljs-keyword\">if<\/span> size &lt; <span class=\"hljs-number\">1024.0<\/span>:\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"%3.1f %s\"<\/span> % (size, x)\n        size \/= <span class=\"hljs-number\">1024.0<\/span>\n\nf_size = os.path.getsize(<span class=\"hljs-string\">r'E:\/demos\/account\/sales.txt'<\/span>)\nx = convert_bytes(f_size)\nprint(<span class=\"hljs-string\">'file size is'<\/span>, x)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><button class=\"hljs-copy-button\" onclick=\"copy_code('code2', this);\"><i class=\"far fa-copy1\" aria-hidden=\"true\"><\/i><\/button><\/div>\n\n\n<p><strong>Output<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">file size is 10.3 KB<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">os.stat() Method to Check File Size <\/h2>\n\n\n\n<p>The <code>os.stat()<\/code> method returns the statistics of a file such as metadata of a file, creation or modification date, file size, etc.<\/p>\n\n\n\n<ul><li>First, import the os module<\/li><li>Next, use the <code>os.stat('file_path')<\/code> method to get the file statistics.<\/li><li>At the end, use the <code>st_size<\/code> attribute to get the file size.<\/li><\/ul>\n\n\n\n<p><strong>Note<\/strong>: The <code>os.path.getsize()<\/code> function internally uses the <code>os.stat('path').st_size<\/code>.<\/p>\n\n\n\n<p><strong>Example<\/strong>:<\/p>\n\n\n<div class=\"hljstoolbar\"><pre id=\"code3\"  id=\"norun\" class=\"wp-block-code language-python\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> os\n\n<span class=\"hljs-comment\"># get file statistics<\/span>\nstat = os.stat(<span class=\"hljs-string\">r'E:\/demos\/account\/sales.txt'<\/span>)\n\n<span class=\"hljs-comment\"># get file size<\/span>\nf_size = stat.st_size\nprint(<span class=\"hljs-string\">'file size is'<\/span>, f_size, <span class=\"hljs-string\">'bytes'<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><button class=\"hljs-copy-button\" onclick=\"copy_code('code3', this);\"><i class=\"far fa-copy1\" aria-hidden=\"true\"><\/i><\/button><\/div>\n\n\n<p><strong>Output<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">file size is 10560 bytes<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Pathlib Module to Get File Size<\/h2>\n\n\n\n<p>From Python 3.4 onwards, we can use the&nbsp;<a href=\"https:\/\/docs.python.org\/3\/library\/pathlib.html\" target=\"_blank\" rel=\"noreferrer noopener\">pathlib module<\/a>, which provides a wrapper for most OS functions.<\/p>\n\n\n\n<ul><li>Import pathlib module: Pathlib module offers classes and methods to handle filesystem paths and get data related to files for different operating systems.<\/li><li>Next, Use the <code>pathlib.Path('path').stat().st_size<\/code> attribute to get the file size in bytes<\/li><\/ul>\n\n\n\n<p><strong>Example<\/strong>:<\/p>\n\n\n<div class=\"hljstoolbar\"><pre id=\"code4\"  id=\"norun\" class=\"wp-block-code language-python\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> pathlib\n\n<span class=\"hljs-comment\"># calculate file size in KB, MB, GB<\/span>\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title\">convert_bytes<\/span><span class=\"hljs-params\">(size)<\/span>:<\/span>\n    <span class=\"hljs-string\">\"\"\" Convert bytes to KB, or MB or GB\"\"\"<\/span>\n    <span class=\"hljs-keyword\">for<\/span> x <span class=\"hljs-keyword\">in<\/span> &#91;<span class=\"hljs-string\">'bytes'<\/span>, <span class=\"hljs-string\">'KB'<\/span>, <span class=\"hljs-string\">'MB'<\/span>, <span class=\"hljs-string\">'GB'<\/span>, <span class=\"hljs-string\">'TB'<\/span>]:\n        <span class=\"hljs-keyword\">if<\/span> size &lt; <span class=\"hljs-number\">1024.0<\/span>:\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"%3.1f %s\"<\/span> % (size, x)\n        size \/= <span class=\"hljs-number\">1024.0<\/span>\n\npath = pathlib.Path(<span class=\"hljs-string\">r'E:\/demos\/account\/sales.txt'<\/span>)\nf_size = path.stat().st_size\nprint(<span class=\"hljs-string\">'File size in bytes'<\/span>, f_size)\n\n<span class=\"hljs-comment\"># you can skip this if you don't want file size in KB or MB<\/span>\nx = convert_bytes(f_size)\nprint(<span class=\"hljs-string\">'file size is'<\/span>, x)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><button class=\"hljs-copy-button\" onclick=\"copy_code('code4', this);\"><i class=\"far fa-copy1\" aria-hidden=\"true\"><\/i><\/button><\/div>\n\n\n<p><strong>Output<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">file size is 10.3 KB<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Get File Size of a File Object<\/h2>\n\n\n\n<p>Whenever we use file methods such as <a href=\"https:\/\/pynative.com\/python-read-file\/\">read()<\/a> or a <a href=\"https:\/\/pynative.com\/python-write-file\/\">write()<\/a>, we get a <a href=\"https:\/\/pynative.com\/python-file-objects\/\">file object<\/a> in return that represents a file.<\/p>\n\n\n\n<p>Also, sometimes we receive a file object as an argument to a function, and we wanted to find a size of a file this file object is representing.<\/p>\n\n\n\n<p>All the above solutions work for a file present on a disk, but if you want to find file size for file-like objects, use the below solution.<\/p>\n\n\n\n<p>We will use the <code>seek()<\/code> function to move the file pointer to calculate the file size. Let&#8217;s see the steps.<\/p>\n\n\n\n<ul><li>Use the <code>open()<\/code> function to <a href=\"https:\/\/pynative.com\/python-file-open\/\">open a file<\/a> in reading mode. When we open a file, the cursor always points to the start of the file.<\/li><li>Use the <a href=\"https:\/\/pynative.com\/python-file-seek\/\">file seek()<\/a> method to move the file pointer at the end of the file.<\/li><li>Next, use the file <code>tell()<\/code> method to get the file size in bytes. The <code>tell()<\/code> method returns the current cursor location, equivalent to the number of bytes the cursor has moved, which is nothing but a file size in bytes.<\/li><\/ul>\n\n\n\n<p><strong>Example<\/strong>:<\/p>\n\n\n<div class=\"hljstoolbar\"><pre id=\"code5\"  id=\"norun\" class=\"wp-block-code language-python\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-comment\"># fp is a file object.<\/span>\n<span class=\"hljs-comment\"># read file<\/span>\nfp = open(<span class=\"hljs-string\">r'E:\/demos\/account\/sales.txt'<\/span>, <span class=\"hljs-string\">'r'<\/span>)\nold_file_position = fp.tell()\n\n<span class=\"hljs-comment\"># Moving the file handle to the end of the file<\/span>\nfp.seek(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">2<\/span>)\n\n<span class=\"hljs-comment\"># calculates the bytes <\/span>\nsize = fp.tell()\nprint(<span class=\"hljs-string\">'file size is'<\/span>, size, <span class=\"hljs-string\">'bytes'<\/span>)\nfp.seek(old_file_position, <span class=\"hljs-number\">0<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre><button class=\"hljs-copy-button\" onclick=\"copy_code('code5', this);\"><i class=\"far fa-copy1\" aria-hidden=\"true\"><\/i><\/button><\/div>\n\n\n<p><strong>Output<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">file size is 10560 bytes<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Sumary<\/h2>\n\n\n\n<p>In this article, We used the following&nbsp;<strong>three methods<\/strong>&nbsp;of an OS and pathlib module to get file size.<\/p>\n\n\n\n<p><strong>os.path module<\/strong>:<\/p>\n\n\n\n<ul><li><code>os.path.getsize('file_path')<\/code>: Return the file size in bytes.<\/li><li><code>os.stat(file).st_size<\/code>: Return the file size in bytes<\/li><\/ul>\n\n\n\n<p><strong>Pathlib module<\/strong>:<\/p>\n\n\n\n<ul><li><code>pathlib.Path('path').stat().st_size<\/code>: Return the file size in bytes.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, you\u2019ll learn how to get file size in Python. Whenever we work with files, sometimes we need to check file size before performing any operation. For example, if you are trying to copy content from one file into another file. In this case, we can check if the file size is greater [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_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":[22,33],"tags":[34],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.4 (Yoast SEO v22.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python Get File Size [4 Ways] &#8211; PYnative<\/title>\n<meta name=\"description\" content=\"Python OS and pathlib module to get file size. 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Use os.path.getsize('file') and os.stat(file).st_size methods to get File size in KB and MB\",\"breadcrumb\":{\"@id\":\"https:\/\/pynative.com\/python-get-file-size\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/pynative.com\/python-get-file-size\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/pynative.com\/python-get-file-size\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/pynative.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Python\",\"item\":\"https:\/\/pynative.com\/python\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"File Handling\",\"item\":\"https:\/\/pynative.com\/python\/file-handling\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Python Check File Size\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/pynative.com\/#website\",\"url\":\"https:\/\/pynative.com\/\",\"name\":\"PYnative\",\"description\":\"Python Programming\",\"publisher\":{\"@id\":\"https:\/\/pynative.com\/#\/schema\/person\/64b55d5bde2265918c5a9931de4de71f\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/pynative.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/pynative.com\/#\/schema\/person\/64b55d5bde2265918c5a9931de4de71f\",\"name\":\"Vishal\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/pynative.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/pynative.com\/wp-content\/uploads\/2019\/01\/vishalHule.jpg\",\"contentUrl\":\"https:\/\/pynative.com\/wp-content\/uploads\/2019\/01\/vishalHule.jpg\",\"width\":968,\"height\":1065,\"caption\":\"Vishal\"},\"logo\":{\"@id\":\"https:\/\/pynative.com\/#\/schema\/person\/image\/\"},\"description\":\"Founder of PYnative.com. I am a Python developer and I love to write articles to help developers. | All the best for your future Python endeavors!\",\"sameAs\":[\"https:\/\/pynative.com\"]},{\"@type\":\"HowTo\",\"@id\":\"https:\/\/pynative.com\/python-get-file-size\/#howto-1\",\"name\":\"Python Check File Size\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/pynative.com\/python-get-file-size\/#article\"},\"description\":\"For example, you want to\u00a0<a href=\\\"https:\/\/pynative.com\/python-read-file\/\\\">read a file<\/a>\u00a0to analyze the sales data to prepare a monthly report, but before performing this operation we want to check whether the file contains any data.<br\/><br\/>The\u00a0<a href=\\\"https:\/\/docs.python.org\/3\/library\/os.path.html\\\" target=\\\"_blank\\\" rel=\\\"noreferrer noopener\\\">os.path module<\/a>\u00a0has some valuable functions on pathnames. 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