Python Program to Count the Number of Words in a Text File














































Python Program to Count the Number of Words in a Text File



Description:
We have to count the number of the word in a given file. In order to do that first, we need to open the file in reading mode.
ex:f=open('input.txt', 'r'), here the 1st argument of 'open' function is a text file name or full path of a text file and the second argument is a mode of an opening file. For more info, you can prefer Python3.7 Documentation.
After opening the file in reading mode, we need to read the file using 'read()' function that returns the contents of the text file as a string. Next, we split the string into word using 'split()' function.

Now using 'len()' in-built function, that returns the number of elements in the list.

For better understanding take look on Python3 Program:

class File:                                  ##File is class name
def countTheNumberOfWordsInTextFile(self,filename):
self.filename = filename
try:
self.file = open(filename, 'r') ## opening the file in reading mode.
except:
print('{} not found'.format(self.filename)) ##if file is not found.
return 0
self.content = self.file.read() ## readlines() function returns the list of all lines.
self.file.close() ## closeing the file
self.count_words=len(self.content.split()) ## len() is in-built function that returns number of element in list
print('Number of words in {} is:{}'.format(self.filename,self.count_words)) ## printing the output
def main():
f = File() ##creating objectof 'File' class named as f
filename = input('Enter text file name or full path of text file:') ##taking user input of file name
f.countTheNumberOfWordsInTextFile(filename) ## call the method of File class

if __name__=='__main__':
main()

Input:
'input.txt' that contains:-
'Develop a common platform for C++ and Python Engineers.
Python is fun.
I got an internship at cppsecrets.com'

Output:
Enter text file name or full path of text file:input.txt
Number of words in input.txt is:18

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