How to check if a variable exists in Python?

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How do I check if a variable exists in python?

If a variable exists, then it is defined either locally based or globally based. A local type variable is defined inside a function, while a global variable is defined outside a function.

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CHECK IF A VARIABLE EXISTS LOCALLY OR GLOBALLY

Use locals() to return a dictionary of main variables defined locally based. Use the syntax variable in locals() to check if a variable is defined locally.

Example 1: checks if user_type_id is a local variable

def f():
    user_type_id = 0
    is_local = "user_type_id" in locals()

    print(is_local)

f()

//RESULTS
True

so simple you can Use globals() to return a data dictionary for variables defined globally based.

Example 2: checks if user_type_id is a global variable

def f():
    user_type_id = 0
    is_global = "user_type_id" in globals()
    print(is_global)

f()
//RESULTS
False

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I hope you get an idea about global and local variables.
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