Understanding Variable Scope In Nested Functions In Python

I have the following functions in Python3.7 def output_report(): sheet_dict = {1: 'All', 2: 'Wind', 3: 'Soalr'} sheet_name = sheet_dict[sheet_num] file_name = f'{file_

Solution 1:

In your first case

def good_func():
    sheet_num = 2
    row_num = 2
    a = test_file('new file')
    return a

sheet_num and row_num are local to the function good_func and hence cannot be accessed in another function output_report

But when you do

sheet_num = 2
row_num = 2def good_func():
    a = test_file('new file')
    return a

sheet_num and row_num become global variables accessible to all other functions, hence they are accessible in output_report as well

Also nested function are functions whose definition lies within another function like so, where a is accessible in inner

def outer():
    a = 1def inner():
        print(a)
    inner()

outer()

Calling another function inside a function like you do in good_func doesn't make them output_function nested.