How to resolve the algorithm Word wrap step by step in the Python programming language

Published on 12 May 2024 09:40 PM

How to resolve the algorithm Word wrap step by step in the Python programming language

Table of Contents

Problem Statement

Even today, with proportional fonts and complex layouts, there are still cases where you need to wrap text at a specified column.

The basic task is to wrap a paragraph of text in a simple way in your language.
If there is a way to do this that is built-in, trivial, or provided in a standard library, show that. Otherwise implement the minimum length greedy algorithm from Wikipedia. Show your routine working on a sample of text at two different wrap columns.

Wrap text using a more sophisticated algorithm such as the Knuth and Plass TeX algorithm.
If your language provides this, you get easy extra credit, but you must reference documentation indicating that the algorithm is something better than a simple minimum length algorithm. If you have both basic and extra credit solutions, show an example where the two algorithms give different results.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Word wrap step by step in the Python programming language

The provided Python code demonstrates the usage of the textwrap.fill() function to reformat a single paragraph of text within a specified line width. Here's a detailed explanation:

  1. Importing the textwrap Module:

    import textwrap

    This line imports the textwrap module, which contains a variety of functions for wrapping text to fit within a specified width.

  2. Help on textwrap.fill() Function:

    help(textwrap.fill)

    This line displays the documentation string for the textwrap.fill() function. It provides a description of the function's purpose and available keyword arguments.

  3. Defining a Sample Text:

    txt = '''\
    Reformat the single paragraph in 'text' to fit in lines of no more
    than 'width' columns, and return a new string containing the entire
    wrapped paragraph.  As with wrap(), tabs are expanded and other
    whitespace characters converted to space.  See TextWrapper class for
    available keyword args to customize wrapping behaviour.'''

    A multi-line string is assigned to the txt variable. This sample text will be used for text wrapping.

  4. Wrapping Text with textwrap.fill():

    print(textwrap.fill(txt, width=75))
    print(textwrap.fill(txt, width=45))
    print(textwrap.fill(txt, width=85))

    The textwrap.fill() function is called multiple times with different values for the width parameter. This parameter defines the maximum width of each line in the wrapped text. The results are printed to the console.

    • First call with width=75: Wraps the text within a line width of 75 characters.
    • Second call with width=45: Wraps the text within a line width of 45 characters.
    • Third call with width=85: Wraps the text within a line width of 85 characters.
  5. Output: The output of the program will vary depending on the width specified for each call. Here's an example of the output with width=75:

    Reformat the single paragraph in 'text' to fit in lines of no more than
    'width' columns, and return a new string containing the entire wrapped
    paragraph.  As with wrap(), tabs are expanded and other whitespace
    characters converted to space.  See TextWrapper class for available keyword
    args to customize wrapping behaviour.
    

    The text is wrapped within lines of 75 characters, with spaces added to maintain readability.

In summary, this code demonstrates how to use the textwrap.fill() function to wrap a given text paragraph within a specified line width, producing a new string with the reformatted text. It shows how the width parameter affects the wrapping behavior, resulting in different line breaks and spacing.

Source code in the python programming language

>>> import textwrap
>>> help(textwrap.fill)
Help on function fill in module textwrap:

fill(text, width=70, **kwargs)
    Fill a single paragraph of text, returning a new string.
    
    Reformat the single paragraph in 'text' to fit in lines of no more
    than 'width' columns, and return a new string containing the entire
    wrapped paragraph.  As with wrap(), tabs are expanded and other
    whitespace characters converted to space.  See TextWrapper class for
    available keyword args to customize wrapping behaviour.

>>> txt = '''\
Reformat the single paragraph in 'text' to fit in lines of no more
than 'width' columns, and return a new string containing the entire
wrapped paragraph.  As with wrap(), tabs are expanded and other
whitespace characters converted to space.  See TextWrapper class for
available keyword args to customize wrapping behaviour.'''
>>> print(textwrap.fill(txt, width=75))
Reformat the single paragraph in 'text' to fit in lines of no more than
'width' columns, and return a new string containing the entire wrapped
paragraph.  As with wrap(), tabs are expanded and other whitespace
characters converted to space.  See TextWrapper class for available keyword
args to customize wrapping behaviour.
>>> print(textwrap.fill(txt, width=45))
Reformat the single paragraph in 'text' to
fit in lines of no more than 'width' columns,
and return a new string containing the entire
wrapped paragraph.  As with wrap(), tabs are
expanded and other whitespace characters
converted to space.  See TextWrapper class
for available keyword args to customize
wrapping behaviour.
>>> print(textwrap.fill(txt, width=85))
Reformat the single paragraph in 'text' to fit in lines of no more than 'width'
columns, and return a new string containing the entire wrapped paragraph.  As with
wrap(), tabs are expanded and other whitespace characters converted to space.  See
TextWrapper class for available keyword args to customize wrapping behaviour.
>>>


  

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