Answers for "Purpose of __main__() in a python file python"

how to define main in python

# Defining main function 
def main(): 
    print("hello World") 
  
  
# Using the special variable  
# __name__ 
if __name__=="__main__": 
    main()

python __main__

1from time import sleep
 2
 3print("This is my file to demonstrate best practices.")
 4
 5def process_data(data):
 6    print("Beginning data processing...")
 7    modified_data = data + " that has been modified"
 8    sleep(3)
 9    print("Data processing finished.")
10    return modified_data
11
12def read_data_from_web():
13    print("Reading data from the Web")
14    data = "Data from the web"
15    return data
16
17def write_data_to_database(data):
18    print("Writing data to a database")
19    print(data)
20
21def main():
22    data = read_data_from_web()
23    modified_data = process_data(data)
24    write_data_to_database(modified_data)
25
26if __name__ == "__main__":
27    main()