π¬ Question: Say, you want to dynamically create a variable in your Python script that is named like a string. For example, you want to name the variable after a string value 'Vladimir'
and assign a value to it so you can access the results using only the variable name Vladimir
without the string quotes around 'Vladimir'
. How to accomplish this in Python?
Answer
You can dynamically create a global variable based on a given string in var_name
by using the expression globals()[var_name] = var_value
to modify the dictionary of the global variables.
This code snippet is used to create a global variable. It takes user input for the variable name and value, then calls the create_var()
function which creates a new global variable with the given name and value. Finally, it prints out a list of all global variables that have been defined using the built-in dir()
function.
def create_var(var_name, var_value): globals()[var_name] = var_value q = input('Do you want to create a new variable? ') if q!='y': print('okay, bye!') else: name = input('your variable name: ') value = input('your variable value: ') create_var(name, value) print(dir())
Here’s an example run where the user types in the string 'Vladimir'
and the code creates a new variable that can be accessed without the quotes, i.e., as variable Vladimir
:

You can learn more about the user input processing in the following tutorial.
π Recommended Tutorial: Python input()
Function

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