Print the number of words in the sentence by calling up the function.Define the variable, num_words, which sums up the number of elements in a list, excluding special characters, after they have been split.Define the function, count_words_string, which serves the purpose of counting the words in the string.The pseudocode for this methodology is cited as follows:. There is another way that special characters can be removed from a string by using string, being a built-in set of methods that can be used on strings. The code for the solution using the library, re, can be found in the screenshot below: Print off the number of words in the original sentence.When the function is complete, it returns the element num_words.Python's len function counts the length of the list and posits this information in the variable, num_words. The function re.findall breaks the string up into elements.Define the function, count_words_re, which will serve the purpose of counting the words in the string.The pseudocode for the algorithm below is as follows: Regular expressions (called REs, or regexes, or regex patterns) are essentially a tiny, highly specialised programming language embedded inside Python and made available through the re module. The next algorithm can be used to count the number of words in a sentence, excluding special characters, utilises a library in Python, re. The algorithm above does not exclude special characters from the word count, so if a string has special characters that should not be included in the word count, another algorithm will need to be used. The code for this algorithm can be found in the screenshot below:
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