Hello guys, yesterday I posted a program that counted the letters that appeared in a text. Today we will make something similar but instead of counting letters we will be counting words.
I will show you diferent ways of doing this, first using a build in function and then creating our own function.
Here is the simplest way of doing it. We have a string stored in a variable (with split() we make the string into a list) and with the function counter() that does exactly what we want, we print the result. It looks like this:
Ok now a little more complicated (we should not do complicated stuff, this is just for learning purposes)
In this one we check if the word in the list (that is formed with spit()) is in a list, if it is not, the word is added and in thesame position in other list it is added a value 1 to the amount of times it repeats. If the word is already on the list we recover the index of that word and on the same position we add +1 to the list with numbers. Finally we print the word followed by it’s frecuency:
Now we build our own function
The first funtion filtrar erases all the invalid characters so the only thing left are lower case words.
The function count_words() does the same as what we previously explained with the lists but instead of using 2 lists, it adds the word to a dictionary with the value of the amount of times it repeats itself, pretty easy right?
We proceed to ask the user for an input or to open a text file, when opening the text file we type ‘r’ for it to be in read mode (not modified), we change the file to lower case (without modifying the original file), we filter it and then use our count_words function. This is the output:
That’s all for this post. Take care and enjoy this video:
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The code is avaliable in github: https://github.com/Guemez/TC1014/blob/master/countwords.py
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Computer Systems Engineering 