How to programmatically set a global (module) variable in python?

How to programmatically set a global (module) variable in python?

In Python, you can programmatically set a global variable in a module by simply assigning a value to it. Here's how you can do it:

Suppose you have a module called my_module.py with a global variable named my_global_var, and you want to set its value programmatically from another script:

my_module.py:

# my_module.py my_global_var = None

main.py:

# main.py import my_module # Set the global variable in my_module.py my_module.my_global_var = "Hello, World!" # Access and print the updated value print(my_module.my_global_var)

In this example:

  1. my_module.py contains the global variable my_global_var initially set to None.

  2. main.py imports my_module.

  3. In main.py, we set the value of my_global_var in my_module to "Hello, World!". This change is reflected in the my_module module.

  4. We then access and print the updated value of my_global_var.

When you run main.py, it will set and display the updated value of my_global_var.

Examples

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    • Code:
      global_var = None def set_global(): global global_var global_var = "new value" set_global() print(global_var)

  2. Python modify global variable in function

    • Description: This query explores how to modify the value of a global variable within a Python function.
    • Code:
      global_var = 5 def modify_global(): global global_var global_var += 1 modify_global() print(global_var)

  3. Python assign value to global variable

    • Description: This query aims to understand how to assign a value to a global variable directly in Python.
    • Code:
      global_var = None global_var = "new value" print(global_var)

  4. Python set module-level variable

    • Description: This query focuses on setting a variable at the module level in Python.
    • Code:
      # In a module named example.py module_variable = None def set_module_variable(value): global module_variable module_variable = value set_module_variable("new value") print(module_variable)

  5. Python update global variable across modules

    • Description: This query explores how to update a global variable that is accessible across multiple Python modules.
    • Code:
      # In module1.py global_var = None # In module2.py import module1 module1.global_var = "new value" print(module1.global_var)

  6. Python change global variable value

    • Description: This query looks into changing the value of a global variable in Python.
    • Code:
      global_var = "old value" global_var = "new value" print(global_var)

  7. Python set global variable from another module

    • Description: This query explores how to set the value of a global variable in one Python module from another module.
    • Code:
      # In module1.py global_var = None # In module2.py import module1 module1.global_var = "new value" print(module1.global_var)

  8. Python declare global variable

    • Description: This query focuses on how to declare a global variable in Python.
    • Code:
      global global_var global_var = "new value" print(global_var)

  9. Python set global variable in class

    • Description: This query explores setting a global variable within a class definition in Python.
    • Code:
      global_var = None class MyClass: global global_var global_var = "new value" print(global_var)

  10. Python define global variable in function

    • Description: This query aims to understand how to define a global variable within a Python function.
    • Code:
      def set_global(): global global_var global_var = "new value" set_global() print(global_var)

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