Python | Sort URLs by top-level domain

Given a list of URLs, the challenge is to sort the URLs in the list based on the top-level domain. 
Top Level Domain (TLD) is one of the highest-level domains in the Internet’s hierarchical domain name system. Example — org, com, edu. 
This is mainly used when we need to delete pages and sort the URL by top-level domain. It is widely used in open source projects and serves as a usable snippet.

  Input:  url = ["https://www.isb.edu", "www. google.com "," http://cyware.com "," https://www.gst.in "," https://www.coursera.org "," https://www.create.net " , "https://www.ontariocolleges.ca"]  Output:  [’https://www.ontariocolleges.ca’,’ www.google.com’, ’http:// cyware. com’, ’https://www.isb.edu’,’ https://www.gst.in’, ’https://www.create.net’,’ https://www.coursera.org’ ]  Explanation:  The Tld for the above list is in sorted order [’.ca’,’ .com’, ’.com’,’ .edu’, ’.in’,’ .net’ , ’.org’] 

Here are some ways to accomplish the above task.

Method 1: using sorted
You can separate the input by and then use sorting to sort by TLD.

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# Python code to sort the URL in the list based on the top-level domain.   # Url list initialization Input = [ " https://www.isb.edu " , " www.google.com " , " http:// cyware .com " ,   " https://www.gst.in " , " https: / /www.coursera. org " ,   " https://www.create.net " , " https://www.ontariocolleges.ca " ]    # Sort function in order def tld ( Input ): return Input . split ( ’. ’ ) [ - 1 ]    # Using sorting and function call Output = sorted ( Input , key = tld)   # Print output print ( "Initial list is:" ) print ( Input ) print ( "sorted list according to TLD is " ) print ( Output)

  Initial list is:  [’https://www.isb.edu’,’ www.google. com’, ’http:// cyware.com’,’ https://www.gst.in’, ’https://www.coursera.org’,’ https://www.create.net’, ’ https://www.ontariocolleges.ca’]  Sorted list according to TLD is:  [’https://www.ontariocolleges.ca’,’ www.google.com’, ’http: / / cyware.com’, ’https://www.isb.edu’,’ https://www.gst.in’, ’https://www.create.net’,’ https://www.coursera .org’] 

Method 2: Using a lambda
The shortest and most readable way to sort URLs in a list based on top-level domain — this is using lambda.

# Python code to sort a URL in a list based on the top-level domain.   # Url list initialization Input = [ " https://www.isb.edu " , " www.google.com " , " http://cyware.com " , " https://www.gst.in " , " https://www.coursera.org " , " https://www.create.net " , " https://www.ontariocolleges.ca " ]   # Using lambda and sorting Output = sorted ( Input , key = lambda x: x.split ( ’.’ ) [ - 1 ])   # Print output print ( "Initial list is:" ) print ( Input ) print ( "sorted list according to TLD is" ) print (Output)

  Initial list is:  [’https://www.isb.edu’, ’www.google.com’,’ http:// cyware.com’, ’https://www.gst.in’,’ https://www.coursera.org’, ’https://www.create .net’, ’https://www.ontariocolleges.ca’]  Sorted list according to TLD is:  [’ https://ww w.ontariocolleges.ca’, ’www.google.com’,’ http:// cyware.com’, ’https://www.isb.edu’,’ https://www.gst.in’, ’ https://www.create.net’, ’https://www.coursera.org’] 

Method 3: use in reverse
Reverse input and breaking it up, then applying sorting to sort the URL by TLD

# Python code to sort a URL in a list based on the top-level domain.   # Url list initialization Input = [ " https://www.isb.edu " , "www.google.com" , " http://cyware.com " , " https://www.gst.in " , " https://www.coursera.org " , " https://www.create. net " , " https://www.ontariocolleges.ca " ]   # Inner function to reverse def internal (string):   return list ( reversed (string.split ( ’.’ )))   # Using sorting and calling internals for the reverse Output = sorted ( Input , key = internal)    # Print output print ( " Initial list is: " ) print ( Input ) print ( "sorted list according to TLD is" ) print (Output)

  Initial list is:  [’https://www.isb.edu’,’ www.google.com’ , ’http:// cyware.com’,’ https://www.gst.in’, ’https://www.coursera.org’,’ https://www.create.net’, ’https://www.ontariocolleges.ca’]  Sorted list according to TLD is:  [’https://www.ontariocolleges.ca’,’ www.google.com’, ’http:// cyware .com’, ’https://www.isb.edu’,’ https://www.gst.in’, ’https://www.create.net’,’ https://www.coursera.org ’]