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Python File I/O: Takes a text file as input and returns the number of words of a given text file

Python File I/O: Exercise-18 with Solution

Write a Python program that takes a text file as input and returns the number of words of a given text file.

Note: Some words can be separated by a comma with no space.

words.txt:
Write a Python program that accept some words and count the number of distinct words. Print the number of distinct words and number of occurrences for each distinct word according to their appearance.

Sample Solution:

Python Code:

def count_words(filepath):
   with open(filepath) as f:
       data = f.read()
       data.replace(",", " ")
       return len(data.split(" "))
print(count_words("words.txt"))

Sample Output:

33

Flowchart:

Flowchart: File I/O: Takes a text file as input and returns the number of words of a given text file.

Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m