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Python File I/O: Extract characters from various text files and puts them into a list

Python File I/O: Exercise-19 with Solution

Write a Python program to extract characters from various text files and puts them into a list.

words1.txt
Welcome to the Python Wiki, a user-editable compendium of knowledge
based around the Python programming language. Some pages are protected
against casual editing - see WikiEditingGuidelines for more information
about editing content.

words2.txt
Python is a great object-oriented, interpreted, and interactive
programming language. It is often compared (favorably of course :-) )
to Lisp, Tcl, Perl, Ruby, C#, Visual Basic, Visual Fox Pro, Scheme or Java...
and it's much more fun.

Sample Solution:

Python Code:

import glob
char_list = []
files_list = glob.glob("*.txt")
for file_elem in files_list:
   with open(file_elem, "r") as f:
       char_list.append(f.read())
print(char_list)

Sample Output:

["Python is a great object-oriented, interpreted, and interactive\nprogramming language. It is often compared (favorably of course :-) )\nto Lisp, Tcl, Perl, Ruby, C#, Visual Basic, Visual Fox Pro, Scheme or Java...\nand it's much more fun.", 'Welcome to the Python Wiki, a user-editable compendium of knowledge\nbased around the Python programming language. Some pages are protected\nagainst casual editing - see WikiEditingGuidelines for more information\nabout editing content.\n']

Flowchart:

Flowchart: File I/O: Extract characters from various text files and puts them into a list.

Python Code Editor:

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Previous: Write a Python program that takes a text file as input and returns the number of words of a given text file.
Next: Write a Python program to generate 26 text files named A.txt, B.txt, and so on up to Z.txt.

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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