{"id":201146,"date":"2024-10-03T10:24:26","date_gmt":"2024-10-03T10:24:26","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/"},"modified":"2024-10-03T10:24:26","modified_gmt":"2024-10-03T10:24:26","slug":"how-to-change-value-of-global-variable-in-python","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/","title":{"rendered":"How to change value of global variable in Python?"},"content":{"rendered":"<p>Global variables in Python are variables that are declared outside of any function and can be accessed from any part of the program. Changing the value of a global variable may be necessary in certain situations. Here, we discuss how to change the value of a global variable in Python.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Global_Variables_in_Python\" title=\"Global Variables in Python\">Global Variables in Python<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#How_to_Declare_a_Global_Variable\" title=\"How to Declare a Global Variable\">How to Declare a Global Variable<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#How_to_Access_a_Global_Variable\" title=\"How to Access a Global Variable\">How to Access a Global Variable<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#How_to_Change_Value_of_Global_Variable_in_Python\" title=\"How to Change Value of Global Variable in Python?\">How to Change Value of Global Variable in Python?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#How_to_Avoid_Global_Variables\" title=\"How to Avoid Global Variables?\">How to Avoid Global Variables?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#What_Happens_if_a_Global_Variable_is_Declared_Inside_a_Function\" title=\"What Happens if a Global Variable is Declared Inside a Function?\">What Happens if a Global Variable is Declared Inside a Function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Change_the_Value_of_a_Global_Variable_Inside_a_Function_Without_Using_the_Global_Keyword\" title=\"Can You Change the Value of a Global Variable Inside a Function Without Using the Global Keyword?\">Can You Change the Value of a Global Variable Inside a Function Without Using the Global Keyword?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Change_the_Value_of_a_Global_Variable_in_a_Nested_Function\" title=\"Can You Change the Value of a Global Variable in a Nested Function?\">Can You Change the Value of a Global Variable in a Nested Function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Change_the_Value_of_a_Global_Variable_in_a_Class_Method\" title=\"Can You Change the Value of a Global Variable in a Class Method?\">Can You Change the Value of a Global Variable in a Class Method?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Delete_a_Global_Variable\" title=\"Can You Delete a Global Variable?\">Can You Delete a Global Variable?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Access_Global_Variables_Across_Modules\" title=\"Can You Access Global Variables Across Modules?\">Can You Access Global Variables Across Modules?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#Can_You_Have_Multiple_Global_Variables_with_the_Same_Name_in_Different_Modules\" title=\"Can You Have Multiple Global Variables with the Same Name in Different Modules?\">Can You Have Multiple Global Variables with the Same Name in Different Modules?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#What_Are_the_Pitfalls_of_Using_Global_Variables\" title=\"What Are the Pitfalls of Using Global Variables?\">What Are the Pitfalls of Using Global Variables?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#How_Can_You_Improve_Code_Maintainability_When_Using_Global_Variables\" title=\"How Can You Improve Code Maintainability When Using Global Variables?\">How Can You Improve Code Maintainability When Using Global Variables?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Global_Variables_in_Python\"><\/span>Global Variables in Python<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In Python, a variable declared outside of any function is by default treated as a global variable. Global variables can be accessed and modified from any part of the program, making them a powerful tool but also potentially risky if not managed carefully.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Declare_a_Global_Variable\"><\/span>How to Declare a Global Variable<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To declare a global variable in Python, simply define the variable outside of any function, class, or block of code. You can then access and modify this variable throughout your program.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Access_a_Global_Variable\"><\/span>How to Access a Global Variable<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To access a global variable in Python, simply refer to the variable by its name. Python will automatically look for the variable in the global scope if it is not found in the local scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Change_Value_of_Global_Variable_in_Python\"><\/span>How to Change Value of Global Variable in Python?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>**To change the value of a global variable in Python, you can use the &#8220;global&#8221; keyword followed by the variable name within a function. This allows you to modify the global variable within the function. Here is an example:**<\/p>\n<p>&#8220;`python<br \/>\nx = 10<\/p>\n<p>def change_global_value():<br \/>\n    global x<br \/>\n    x = 20<\/p>\n<p>change_global_value()<br \/>\nprint(x)  # Output: 20<br \/>\n&#8220;`<\/p>\n<p>By using the &#8220;global&#8221; keyword, you are explicitly telling Python that you want to modify the global variable rather than creating a new local variable with the same name.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Avoid_Global_Variables\"><\/span>How to Avoid Global Variables?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It is generally recommended to avoid using global variables in Python whenever possible. Instead, you can pass variables as parameters to functions and return values as needed. This helps improve code readability and maintainability.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Happens_if_a_Global_Variable_is_Declared_Inside_a_Function\"><\/span>What Happens if a Global Variable is Declared Inside a Function?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If a global variable is declared inside a function without using the &#8220;global&#8221; keyword, Python will create a new local variable with the same name. This means that any modifications made to the variable will only affect the local scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Change_the_Value_of_a_Global_Variable_Inside_a_Function_Without_Using_the_Global_Keyword\"><\/span>Can You Change the Value of a Global Variable Inside a Function Without Using the Global Keyword?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No, in order to change the value of a global variable inside a function, you must use the &#8220;global&#8221; keyword. Without it, Python will create a new local variable within the function scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Change_the_Value_of_a_Global_Variable_in_a_Nested_Function\"><\/span>Can You Change the Value of a Global Variable in a Nested Function?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can change the value of a global variable in a nested function by using the &#8220;global&#8221; keyword within the inner function. This allows you to modify the global variable from within the nested scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Change_the_Value_of_a_Global_Variable_in_a_Class_Method\"><\/span>Can You Change the Value of a Global Variable in a Class Method?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can change the value of a global variable in a class method by using the &#8220;global&#8221; keyword within the method. This allows you to modify the global variable from within the class scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Delete_a_Global_Variable\"><\/span>Can You Delete a Global Variable?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can delete a global variable using the &#8220;del&#8221; keyword followed by the variable name. This will remove the variable from the global scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Access_Global_Variables_Across_Modules\"><\/span>Can You Access Global Variables Across Modules?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can access global variables across modules by importing the module where the global variable is defined. This allows you to use the global variable in the imported module.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_You_Have_Multiple_Global_Variables_with_the_Same_Name_in_Different_Modules\"><\/span>Can You Have Multiple Global Variables with the Same Name in Different Modules?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can have multiple global variables with the same name in different modules. Each module maintains its own global scope, so variables with the same name in different modules are treated as separate entities.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Are_the_Pitfalls_of_Using_Global_Variables\"><\/span>What Are the Pitfalls of Using Global Variables?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Some pitfalls of using global variables include potential name clashes, difficulty in tracking variable modifications, and decreased code readability. It is generally recommended to use global variables sparingly and follow best practices for variable scope.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_Can_You_Improve_Code_Maintainability_When_Using_Global_Variables\"><\/span>How Can You Improve Code Maintainability When Using Global Variables?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To improve code maintainability when using global variables, consider using global variables for truly global state that needs to be accessed and modified throughout the program. Commenting on the purpose of global variables and using descriptive variable names can also help make your code more readable.<\/p>\n<p>By following the guidelines and best practices outlined above, you can effectively manage global variables in Python and ensure that they serve their intended purpose without causing unintended side effects. Remember to use the &#8220;global&#8221; keyword when modifying global variables within functions to avoid issues with variable scoping.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Global variables in Python are variables that are declared outside of any function and can be accessed from any part of the program. Changing the value of a global variable may be necessary in certain situations. Here, we discuss how to change the value of a global variable in Python. Global Variables in Python In &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to change value of global variable in Python?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-value-of-global-variable-in-python\/#more-201146\">Read more<span class=\"screen-reader-text\">How to change value of global variable in Python?<\/span><\/a><\/p>\n","protected":false},"author":51,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-201146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to change value of global variable in Python?<\/title>\n<meta name=\"description\" content=\"Global variables in Python are variables that are declared outside of any function and can be accessed from any part of the program. 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