Creating Custom URL Query Strings in Python

se = 'testengine.com/?p='

list_el = ['telnet', 'ftp', 'usenet', 'gopher']

file = open('report.txt', 'w')

for x in list_el:
    file.write(se + x + '\n')
    print(se + x)

file.close()

The given code is used to write URLs for different internet protocols in a file named "report.txt". Here's a detailed explanation of the code:

1. se = 'testengine.com/?p=': This line initializes a variable se with a string value of testengine.com/?p=. This will be used as the base URL for each protocol.

2. list_el = ['telnet', 'ftp', 'usenet', 'gopher']: This line initializes a list named list_el with four different string values, representing different internet protocols.

3. file = open('report.txt', 'w'): This line opens a new file named "report.txt" in write mode and assigns it to the variable file. The 'w' mode specifies that the file is opened in write mode, which allows new data to be written to the file.

4. for x in list_el:: This line starts a for loop that iterates over each element in the list_el list. On each iteration, the variable x is assigned to the current element in the list.

5. file.write(se + x + '\n'): This line writes the base URL (se), the current protocol (x), and a newline character (\n) to the file. This creates a new line in the file for each protocol.

6. print(se + x): This line prints the same string to the console as is being written to the file. This allows the user to see the progress of the loop in real-time.

7. file.close(): This line closes the file that was opened in the second step. This is important to ensure that all data is written to the file before it is closed, and to prevent any data loss.