{"id":6511,"date":"2018-11-02T11:55:03","date_gmt":"2018-11-02T11:55:03","guid":{"rendered":"https:\/\/www.jquery-az.com\/?p=6511"},"modified":"2018-11-02T11:55:03","modified_gmt":"2018-11-02T11:55:03","slug":"python-enumerate","status":"publish","type":"post","link":"https:\/\/www.jquery-az.com\/python-enumerate\/","title":{"rendered":"What is Enumerate in Python?"},"content":{"rendered":"<p>The enumerate function takes an iterable like a <a href=\"\/python-list-12-examples-to-learn-with-built-in-methods\/\">list<\/a>, <a href=\"\/python-tuple-explained-with-9-examples\/\">tuple<\/a> etc. and returns it as an <strong>enumerate object<\/strong>. The function adds counter to the iterable. For example:<\/p>\n<blockquote><p>FruitEnu = enumerate(FruitsLst)<\/p><\/blockquote>\n<p>The general way of using the enumerate function is:<\/p>\n<blockquote><p>enumerate(iterable, start=0)<\/p><\/blockquote>\n<ul>\n<li>The iterable can be an iterator, sequence or an object that supports iteration.<\/li>\n<li>The default value of the optional argument <strong><em>start<\/em><\/strong> is 0. It defines the starting number of the enumerable object.<\/li>\n<\/ul>\n<h3><strong>An example of enumerate function with list<\/strong><\/h3>\n<p>In this example, we have a list of fruits. Then I used the enumerate function and assigned its return value to a variable.<\/p>\n<p>Finally, the list function is used to display the content of that object variable:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Enumerate function demo\r\n\r\nFruitsLst = ['Apple', 'Banana', 'Strawberry', 'Orange']\r\n\r\n\r\n\r\nFruitEnu = enumerate(FruitsLst)\r\n\r\n\r\n\r\n# Display counter with elements\r\n\r\nprint(list(FruitEnu))<\/pre>\n<p><strong>The output:<\/strong><\/p>\n<blockquote><p>[(0, &#8216;Apple&#8217;), (1, &#8216;Banana&#8217;), (2, &#8216;Strawberry&#8217;), (3, &#8216;Orange&#8217;)]<\/p><\/blockquote>\n<p>You can see, it displayed list of tuple with counter and list elements. As start argument was not provided, so the counter value started at 0.<\/p>\n<p>The next example shows starting the counter value from 10.<\/p>\n<h3><strong>Using the start argument in enumerate function<\/strong><\/h3>\n<p>The example below uses the second argument as well in the enumerate function. As mentioned earlier, this is the start value (a number) that defaults to zero. In this example, I used 10:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Enumerate function demo with start argument\r\n\r\nFruitsLst = ['Orange', 'Pine Apple', 'Apricot', 'Avocado', 'Cantaloupe']\r\n\r\n\r\n\r\nFruitEnu = enumerate(FruitsLst,10)\r\n\r\n\r\n\r\n# Display counter with elements from 10\r\n\r\nprint(list(FruitEnu))<\/pre>\n<p>The result:<\/p>\n<blockquote><p>[(10, &#8216;Orange&#8217;), (11, &#8216;Pine Apple&#8217;), (12, &#8216;Apricot&#8217;), (13, &#8216;Avocado&#8217;), (14, &#8216;Cantaloupe&#8217;)]<\/p><\/blockquote>\n<h3><strong>So, what is the usefulness of enumerate function?<\/strong><\/h3>\n<ul>\n<li>It enables us to loop over something<\/li>\n<li>An automatic counter is added<\/li>\n<li>The ability to change the start number makes it even more useful.<\/li>\n<li>By using list function, you may create a tuple of index and list items.<\/li>\n<\/ul>\n<p>A few more examples of the enumerate function are given below.<\/p>\n<h3><strong>Knowing the return type example<\/strong><\/h3>\n<p>By using the <a href=\"\/python-type-function-3-demos-check-objectvariable-type\/\"><strong>type<\/strong><\/a> function, you may get the type of returned object after using the enumerate function:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">FruitsLst = ['Cherimoya', 'Cherries', 'Clementine']\r\n\r\n\r\n\r\nFruitEnu = enumerate(FruitsLst,15)\r\n\r\n\r\n\r\n# Display the type\r\n\r\nprint(type(FruitEnu))<\/pre>\n<p><strong>The output:<\/strong><\/p>\n<blockquote><p>&lt;class &#8216;enumerate&#8217;&gt;<\/p><\/blockquote>\n<h3><strong>Using enumerate function in for loop example<\/strong><\/h3>\n<p>In this example, we have an enumerate object and iterated it by using a <a href=\"\/learn-using-python-for-loop-7-examples\/\">Python for loop<\/a>. The counter and list elements are displayed as follows:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">LstNum = [5,7,9,11,13,15]\r\n\r\nfor x, cur_num in enumerate(LstNum):\r\n\r\n\u00a0\u00a0\u00a0 print (x, cur_num)<\/pre>\n<p><strong>The output:<\/strong><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-6512\" src=\"https:\/\/www.jquery-az.com\/wp-content\/uploads\/2018\/10\/65.1-Python-enumurate.png\" alt=\"Python enumurate\" width=\"165\" height=\"125\" \/><\/p>\n<h3><strong>Iterating with different start number example<\/strong><\/h3>\n<p>The start argument is also given in this example:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Enumerate object iteration\r\n\r\n\r\n\r\nFruitsLst = ['Orange', 'Pine Apple', 'Apricot', 'Avocado', 'Cantaloupe']\r\n\r\nfor x,fruit in enumerate(FruitsLst,50):\r\n\r\n\u00a0\u00a0\u00a0 print (x, fruit)<\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-6513\" src=\"https:\/\/www.jquery-az.com\/wp-content\/uploads\/2018\/10\/65.2-Python-enumurate-itera.png\" alt=\"Python enumurate iterate\" width=\"188\" height=\"110\" \/><\/p>\n<h3><strong>Enumerating a tuple example<\/strong><\/h3>\n<p>In this example, the enumerate function is used with the tuple. Again, a for loop is used to display the tuple items and count\/index:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Enumerate with tuple\r\n\r\n\r\n\r\nNameTup = ('Mike', 'Saleem', 'Benjaman', 'Marie', 'Sheela')\r\n\r\nfor count_in,name in enumerate(NameTup):\r\n\r\n\u00a0\u00a0\u00a0 print (count_in, name)<\/pre>\n<p><strong>The output:<\/strong><\/p>\n<blockquote><p>0 Mike<\/p>\n<p>1 Saleem<\/p>\n<p>2 Benjaman<\/p>\n<p>3 Marie<\/p>\n<p>4 Sheela<\/p><\/blockquote>\n<h3><strong>Using enumerate function with a string<\/strong><\/h3>\n<p>You may also use enumerate function with the string and get the count added. See an example below:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">#Enumerate with String\r\n\r\n\r\n\r\nstr_x = \"Python\"\r\n\r\nfor count_in,st in enumerate(str_x):\r\n\r\n\u00a0\u00a0\u00a0 print (count_in,\"\\t\",\u00a0 st)<\/pre>\n<p><strong>The output:<\/strong><\/p>\n<blockquote><p>0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0P<\/p>\n<p>1 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0y<\/p>\n<p>2 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0t<\/p>\n<p>3 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0h<\/p>\n<p>4 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0o<\/p>\n<p>5 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>The enumerate function takes an iterable like a list, tuple etc. and returns it as an enumerate object. 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