{"id":14149,"date":"2024-03-15T08:33:53","date_gmt":"2024-03-15T08:33:53","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-read-data-from-a-csv-file-in-python\/"},"modified":"2025-08-06T04:32:40","modified_gmt":"2025-08-06T04:32:40","slug":"how-to-read-data-from-a-csv-file-in-python","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-read-data-from-a-csv-file-in-python\/","title":{"rendered":"Read CSV Files in Python"},"content":{"rendered":"<p>To read data from a CSV file in Python, you can use the built-in csv module. First, you need to import the csv module and then use the open() function to open the CSV file.<\/p>\n<p>Here is an example code that shows how to read data from a CSV file.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> csv\r\n\r\n<span class=\"hljs-comment\"># \u6253\u5f00CSV\u6587\u4ef6<\/span>\r\n<span class=\"hljs-keyword\">with<\/span> <span class=\"hljs-built_in\">open<\/span>(<span class=\"hljs-string\">'data.csv'<\/span>, <span class=\"hljs-string\">'r'<\/span>) <span class=\"hljs-keyword\">as<\/span> file:\r\n    <span class=\"hljs-comment\"># \u521b\u5efaCSV\u8bfb\u53d6\u5668<\/span>\r\n    csv_reader = csv.reader(file)\r\n\r\n    <span class=\"hljs-comment\"># \u904d\u5386\u6bcf\u884c\u6570\u636e<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> row <span class=\"hljs-keyword\">in<\/span> csv_reader:\r\n        <span class=\"hljs-comment\"># \u6253\u5370\u6bcf\u884c\u6570\u636e<\/span>\r\n        <span class=\"hljs-built_in\">print<\/span>(row)\r\n<\/code><\/pre>\n<p>In this example, assuming the CSV file is named &#8220;data.csv,&#8221; we start by opening the file using the open() function with the mode &#8220;r&#8221; (read mode). Then, we create a CSV reader object using csv.reader() to read the data line by line from the file. Lastly, we use a for loop to iterate through each row of data and print it out.<\/p>\n<p>You can skip the header row in a CSV file by using the next() function if the first row contains column names.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> csv\r\n\r\n<span class=\"hljs-comment\"># \u6253\u5f00CSV\u6587\u4ef6<\/span>\r\n<span class=\"hljs-keyword\">with<\/span> <span class=\"hljs-built_in\">open<\/span>(<span class=\"hljs-string\">'data.csv'<\/span>, <span class=\"hljs-string\">'r'<\/span>) <span class=\"hljs-keyword\">as<\/span> file:\r\n    <span class=\"hljs-comment\"># \u521b\u5efaCSV\u8bfb\u53d6\u5668<\/span>\r\n    csv_reader = csv.reader(file)\r\n\r\n    <span class=\"hljs-comment\"># \u8df3\u8fc7\u8868\u5934\u884c<\/span>\r\n    <span class=\"hljs-built_in\">next<\/span>(csv_reader)\r\n\r\n    <span class=\"hljs-comment\"># \u904d\u5386\u6bcf\u884c\u6570\u636e<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> row <span class=\"hljs-keyword\">in<\/span> csv_reader:\r\n        <span class=\"hljs-comment\"># \u6253\u5370\u6bcf\u884c\u6570\u636e<\/span>\r\n        <span class=\"hljs-built_in\">print<\/span>(row)\r\n<\/code><\/pre>\n<p>In this example, the next() function was used to skip the first line of data.<\/p>\n<p>Additionally, if each line of data in the CSV file contains a different number of fields, you can use the csv.DictReader() function to create a dictionary reader object to read the data and store it as a dictionary. Here is an example code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> csv\r\n\r\n<span class=\"hljs-comment\"># \u6253\u5f00CSV\u6587\u4ef6<\/span>\r\n<span class=\"hljs-keyword\">with<\/span> <span class=\"hljs-built_in\">open<\/span>(<span class=\"hljs-string\">'data.csv'<\/span>, <span class=\"hljs-string\">'r'<\/span>) <span class=\"hljs-keyword\">as<\/span> file:\r\n    <span class=\"hljs-comment\"># \u521b\u5efa\u5b57\u5178\u8bfb\u53d6\u5668<\/span>\r\n    csv_reader = csv.DictReader(file)\r\n\r\n    <span class=\"hljs-comment\"># \u904d\u5386\u6bcf\u884c\u6570\u636e<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> row <span class=\"hljs-keyword\">in<\/span> csv_reader:\r\n        <span class=\"hljs-comment\"># \u6253\u5370\u6bcf\u884c\u6570\u636e<\/span>\r\n        <span class=\"hljs-built_in\">print<\/span>(row)\r\n<\/code><\/pre>\n<p>In this example, a dictionary reader object was created using the csv.DictReader() function. This allows each row of data to be stored in dictionary format, with the keys representing column names and the values representing the corresponding data values.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To read data from a CSV file in Python, you can use the built-in csv module. First, you need to import the csv module and then use the open() function to open the CSV file. Here is an example code that shows how to read data from a CSV file. import csv # \u6253\u5f00CSV\u6587\u4ef6 with [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[19057,9800,15868,6636,84],"class_list":["post-14149","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-csv-reader","tag-data-parsing","tag-python-csv","tag-python-file-handling","tag-python-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Read CSV Files in Python - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to read CSV files in Python using the built-in csv module. 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