{"id":3500,"date":"2023-10-22T15:53:13","date_gmt":"2023-10-22T10:23:13","guid":{"rendered":"https:\/\/python-programs.com\/?p=3500"},"modified":"2023-11-10T11:54:40","modified_gmt":"2023-11-10T06:24:40","slug":"python-different-ways-to-create-dictionaries","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-different-ways-to-create-dictionaries\/","title":{"rendered":"Python : 6 Different ways to create Dictionaries"},"content":{"rendered":"<h2>How we can create dictionaries by multiple ways in python ?<\/h2>\n<p>Dictionary in python is one of the important datatype which is used to store data values in <code>key : value<\/code> pair.<\/p>\n<p><strong>Syntax of dictionary :<\/strong><\/p>\n<pre>dictionary_name = {key1: value1, key2: value2}<\/pre>\n<p>where,<\/p>\n<ul>\n<li>key1, key2&#8230; represents keys in a dictionary. These keys can be of any data type like string, integer, tuple, etc. But keys needs to be unique.<\/li>\n<li>value1, value2&#8230; represents values in dictionary. These values can be numbers, strings, list or list within a list etc.<\/li>\n<li>key and value is separated by : symbol.<\/li>\n<li>key-value pair symbol is separated by , symbol.<\/li>\n<\/ul>\n<h3>Approach-1: Creating Empty Dictionary :<\/h3>\n<p>By 2 ways we can create empty dictionary.<\/p>\n<h4>Method-1 : By using { } empty brackets :<\/h4>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# Empty dictionary created using empty brackets\r\ncovid_case_dict = {}\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{ }<\/pre>\n<h4>Method-2: By using using dict() :<\/h4>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# Empty dictionary created using dict()\r\ncovid_case_dict = dict()\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{ }<\/pre>\n<h3>Approach-2: Creating Dictionaries with literals :<\/h3>\n<p>By passing <code>key : value<\/code> pairs literals we can create dictionary.<\/p>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# dictionary created using key-value literals\r\ncovid_case_dict = {\"January\":100000, \"February\":200000, \"March\":300000}\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{\"January\":100000, \"February\":200000, \"March\":300000}<\/pre>\n<h3>Approach-3: Creating Dictionaries by passing parameters in dict constructor :<\/h3>\n<p>By creating dictionary constructor and passing \u00a0key-value pairs within it also we can create a dictionary.<\/p>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n#dictionary created using dictionary constructor\r\ncovid_case_dict = dict(January=100000, February=200000, March=300000)\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{\"January\":100000, \"February\":200000, \"March\":300000}<\/pre>\n<h3>Approach-4: Creating Dictionaries by a list of tuples :<\/h3>\n<p>We can create a dictionary by passing\u00a0 list of tuple within dict constructor.<\/p>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# list of tuples\r\nlist_of_Tuples = [(\"January\",100000), (\"February\",200000), (\"March\",300000)]\r\n#dictionary created by passing tuple in dict constructor\r\ncovid_case_dict = dict(list_of_Tuples)\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{\"January\":100000, \"February\":200000, \"March\":300000}<\/pre>\n<h3>Approach-5: Creating a Dictionary by a list of keys and initializing all with the same value :<\/h3>\n<p>We can create a dictionaries by assigning same vales to all the keys.<\/p>\n<p>Suppose we a dictionary of keys. Let&#8217;s see how we can initialize all keys with same value.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# list of keys \r\ncovid_case_list = [\"Januray\", \"February\", \"March\"]\r\n# create and Initialize a dictionary \r\n#use list elements as keys and with same value 100000\r\ncovid_case_dict = dict.fromkeys(covid_case_list,100000 )\r\nprint(covid_case_dict)<\/pre>\n<pre>Output :\r\n{\"January\":100000, \"February\":100000, \"March\":100000}<\/pre>\n<h3>Approach-6: Creating a Dictionary by two lists :<\/h3>\n<p>If we have two lists, then also we can create a dictionary. For that we can use the elements of the first list as keys and we can use the elements of the second list as values.<\/p>\n<p>In python there is a <code>zip( ) function<\/code> which we will be used and it will iterate over two lists parallelly.<\/p>\n<p>Let&#8217;s see the implementation of it with a program.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Program :\r\n\r\n# First list, its elements will be used as keys \r\ncovid_case_list1 = [\"Januray\", \"February\", \"March\"]\r\n\r\n# Second list, its elements will be used as values\r\ncovid_case_list2 = [100000, 200000, 300000]\r\n#two lists are merged using zip() to create dictionary\r\ncovid_case_dict = dict( zip(covid_case_list1,covid_case_list2))\r\nprint(covid_case_dict)<\/pre>\n<pre>Output : \r\n{\"January\":100000, \"February\":100000, \"March\":100000}<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>How we can create dictionaries by multiple ways in python ? Dictionary in python is one of the important datatype which is used to store data values in key : value pair. Syntax of dictionary : dictionary_name = {key1: value1, key2: value2} where, key1, key2&#8230; represents keys in a dictionary. These keys can be of &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-different-ways-to-create-dictionaries\/\"> <span class=\"screen-reader-text\">Python : 6 Different ways to create Dictionaries<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python : 6 Different ways to create Dictionaries - Python Programs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/python-programs.com\/python-different-ways-to-create-dictionaries\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python : 6 Different ways to create Dictionaries - Python Programs\" \/>\n<meta property=\"og:description\" content=\"How we can create dictionaries by multiple ways in python ? 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