{"id":22415,"date":"2021-11-23T12:09:43","date_gmt":"2021-11-23T06:39:43","guid":{"rendered":"https:\/\/tutorial.eyehunts.com\/?p=22415"},"modified":"2023-05-24T17:15:11","modified_gmt":"2023-05-24T11:45:11","slug":"python-copy-dictionary-into-another-example-code","status":"publish","type":"post","link":"https:\/\/tutorial.eyehunts.com\/python\/python-copy-dictionary-into-another-example-code\/","title":{"rendered":"Python copy dictionary into another | Example code"},"content":{"rendered":"\n

Use the assignment <\/a>operato<\/a>r to shallow copy a dictionary into another in Python. But if you want to use deep copy then use the deepcopy() method.<\/p>\n\n\n\n

<\/div>\n\n\n\n

Example copy a dictionary into another in Python<\/strong><\/h2>\n\n\n\n

Simple example code assign dict2 = dict1<\/code>, not making a copy of dict1<\/code>, it results in dict2<\/code> being just another name for dict1<\/code>.<\/p>\n\n\n\n

Changing dict1 will reflect on dict2 because both dictionary object has the same reference.<\/p>\n\n\n\n

dict1 = {\"key1\": \"value1\", \"key2\": \"value2\"}\ndict2 = dict1\n\ndict1['key1'] = \"zero\"\n\nprint(dict2)<\/code><\/pre>\n\n\n\n
Output<\/strong>: {‘key1’: ‘zero’, ‘key2’: ‘value2’}<\/p>\n\n\n\n
<\/div>\n\n\n\n
To copy the mutable types like dictionaries, use copy<\/code> \/ deepcopy<\/code> of the copy<\/code><\/a> module<\/a>.<\/p>\n\n\n\n
import copy\n\ndict1 = {\"key1\": \"value1\", \"key2\": \"value2\"}\ndict2 = copy.deepcopy(dict1)\n\ndict1['key1'] = \"zero\"\n\nprint(dict2)\n<\/code><\/pre>\n\n\n\n
Output<\/strong>:<\/p>\n\n\n
\n
\"Python<\/figure><\/div>\n\n\n
The advantage of using copy.copy()<\/code> or .copy()<\/code> is that it performs a shallow copy, meaning it creates a new dictionary object, but the values within the dictionary are still references to the same objects in memory. If you modify the values of the original or copied dictionary, the changes will be reflected in both dictionaries.<\/p>\n\n\n\n
<\/div>\n\n\n\n
Do comment if you have any doubts or suggestions on this Python dictionary topic.<\/p>\n\n\n\n
Note:<\/strong> IDE: PyCharm<\/a> 2021.3.3 (Community Edition)<\/p>
Windows 10<\/p>
Python 3.10.1<\/strong><\/p>
All Python Examples are in Python 3<\/strong>, so Maybe its different from python 2 or upgraded versions.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
Use the assignment operator to shallow copy a dictionary into another in Python. But if you want to use deep copy then use the deepcopy() method. Example copy a dictionary into another in Python Simple example code assign dict2 = dict1, not making a copy of dict1, it results in dict2 being just another name… Read More »Python copy dictionary into another | Example code<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[30],"tags":[259,101],"post_series":[],"class_list":["post-22415","post","type-post","status-publish","format-standard","hentry","category-python","tag-python-copy","tag-python-dictionary"],"yoast_head":"\nPython copy dictionary into another | Example code<\/title>\n<meta name=\"description\" content=\"Use assign operator to shallow copy dictionary into another in Python. 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Enthusiasm for technology & like learning technical.","url":"https:\/\/tutorial.eyehunts.com\/author\/rohit\/"}]}},"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":18849,"url":"https:\/\/tutorial.eyehunts.com\/python\/python-initialize-the-empty-dictionary-basics\/","url_meta":{"origin":22415,"position":0},"title":"Python initialize the empty dictionary | Basics","author":"Rohit","date":"October 28, 2021","format":false,"excerpt":"Don't use any values or elements inside the {} curly bracket to initialize the empty dictionary in Python. The empty dictionary can also create by dict() built-in function without any arguments dictionary = {} OR dict = dict() Example initialize an empty dictionary in Python Simple example code both ways.\u2026","rel":"","context":"In "Python"","block_context":{"text":"Python","link":"https:\/\/tutorial.eyehunts.com\/category\/python\/"},"img":{"alt_text":"Python initialize the empty dictionary","src":"https:\/\/i0.wp.com\/tutorial.eyehunts.com\/wp-content\/uploads\/2021\/10\/Python-initialize-the-empty-dictionary.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":36680,"url":"https:\/\/tutorial.eyehunts.com\/python\/python-hashable-dict\/","url_meta":{"origin":22415,"position":1},"title":"Python Hashable Dict","author":"Rohit","date":"July 5, 2023","format":false,"excerpt":"In Python, dictionaries are not hashable by default because they are mutable. However, you can create a hashable dictionary by using an immutable data structure to represent the dictionary. One way to create a hashable dictionary is by converting it into a frozenset of its items. Here's an example: my_dict\u2026","rel":"","context":"In "Python"","block_context":{"text":"Python","link":"https:\/\/tutorial.eyehunts.com\/category\/python\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/tutorial.eyehunts.com\/wp-content\/uploads\/2023\/07\/Python-Hashable-Dict.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/tutorial.eyehunts.com\/wp-content\/uploads\/2023\/07\/Python-Hashable-Dict.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/tutorial.eyehunts.com\/wp-content\/uploads\/2023\/07\/Python-Hashable-Dict.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":18668,"url":"https:\/\/tutorial.eyehunts.com\/python\/python-print-dictionary-values-example-code\/","url_meta":{"origin":22415,"position":2},"title":"Python print dictionary values | Example code","author":"Rohit","date":"September 2, 2021","format":false,"excerpt":"Use values() method to print dictionary values in Python. 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