Python Exercise: Detect the number of local variables declared in a function

Last update on March 29 2025 13:00:01 (UTC/GMT +8 hours)

20. Detect the Number of Local Variables Declared in a Function

Write a Python program to detect the number of local variables declared in a function.

Sample Solution:

Python Code:

# Define a function named 'abc'
def abc():
    # Define and assign values to local variables 'x', 'y', and 'str1' inside the function 'abc'
    x = 1
    y = 2
    str1 = "w3resource"
    
    # Print the string "Python Exercises"
    print("Python Exercises")

# Access the number of local variables in the function 'abc' using the __code__.co_nlocals attribute
print(abc.__code__.co_nlocals) 

Sample Output:

3

Explanation:

In the exercise above the code defines a function "abc()" that contains three local variables: 'x', 'y', and 'str1'. However, it only defines these variables and doesn't utilize them further. Then, it accesses the number of local variables defined in the "abc()" function using the abc.__code__.co_nlocals attribute and prints the result.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program that defines a function with multiple local variables and then prints the count using len(locals()).
• Write a Python program to create a function that returns the list of all local variable names using the __code__.co_varnames attribute.
• Write a Python program to compare the number of local variables between two functions using the inspect module.
• Write a Python program to implement a function that dynamically adds local variables and then returns the total count using locals().

Python Code Editor:

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