Question

Having a little trouble with this assignment.

"Please add comments within Script, for the guidance of the code and what each function is doing, so i can understand more."

Project 4 Draft: Pattern Search PYTHON

Introduction

Your task for this project is to use regular expressions to discover and modify information from the provided test.
The project is broken into two sections:

Determine the number of non alpha numeric characters in the lorem_ipsum string.

Replace all instances of the words ‘sit’ and ‘amet’ separated by a dash (-) or a colon (:) with a space.

original_text='''Lorem ipsum dolor sit-amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor.

Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo.

Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit:amet ex nec dolor gravida

porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum

lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum

elit. Sed euismod vestibulum purus ut porttitor. Integer sit-amet mollis neque. Donec sed lacinia diam, ac finibus

lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio.'''

lorem_ipsum = '''Lorem ipsum dolor sit-amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor.

Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo.

Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit:amet ex nec dolor gravida

porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum

lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum

elit. Sed euismod vestibulum purus ut porttitor. Integer sit-amet mollis neque. Donec sed lacinia diam, ac finibus

lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio.'''

Find and print the number of non-alphanumeric characters

Find and print the number of non-alphanumeric characters.

The first thing to do when doing a pattern search is to import the module re which provides full support for regular expressions in Python. This has already been provided in the code to the left.

Also provided for you on the left is the original string,original_text and the string,lorem_ipsum. lorem_ipsum is the string you will be using to change as you go through the programming activities in this course unit.

Find all of the instances of non alphanumeric characters in the string assigned to lorem_ipsum.

Use the ^ and [] regular expression operator along with the findall() regular expression function.

Assign the outcome to a variable named results.

Output to the console, the number of non-alphanumeric characters. Hint: use the len function.

Find and print the number of 'sit' and 'amet' separated with punctuation marks

Using the re.findall() function, get all of the instances of 'sit-amet' or 'sit:amet' characters in the string assigned to lorem_ipsum.

Assign the outcome to a variable named occurrences_sit_amet

Output to the console, the number of sit-amet or sit:amet occurrences.

Replace 'sit' and 'amet' words separated with punctuation marks with 'sit amet'

Replace sit:amet and sit-amet with sit amet using the re.sub() function.

Assign the outcome to a variable named replace_results

Find and print all the instances of 'sit amet'

Using the re.findall() function, get all of the instances of 'sit amet'in the string assigned to replace_results.

Assign the outcome to a variable named occurrence_sit_amet.

Output to the console, the number of sit amet occurrences.

"Please add comments within Script, for the guidance of the code and what each function is doing, so i can understand more."

Answer 1

Editable Code:

import re

def check_non_alphanum():
   pattern_to_check_non_alphanum = r'[^a-zA-Z0-9\_]'   # Excluding Lower case and Upper case alphabets and 0-9 numbers
   results = re.findall(pattern_to_check_non_alphanum, (str(lorem_ipsum)))   # Finds and returns a list of all non-alphanumeric characters in lorem_ipsum string
   print("Number of occurences of non-alphanumeric characters in lorem_ipsum = %d" %(len(results)))   # Prints the number of non-alphanumeric characters in lorem_ipsum string

def check_occurrences_sit_amet():
   pattern_to_check_sit_amet_with_punctuation = r'sit-amet|sit:amet'   # Pattern to check 'sit-amet' or 'sit:amet'
   occurrences_sit_amet = re.findall(pattern_to_check_sit_amet_with_punctuation, (str(lorem_ipsum)))   # Finds and returns a list of occurences of 'sit-amet' or 'sit:amet'
   print ("Number of occurences of 'sit-amet' and 'sit:amet' in lorem_ipsum = %d" %(len(occurrences_sit_amet)))   # Prints the number of occurences of 'sit-amet' or 'sit:amet'

def replace_lorem_ipsum():
   pattern_to_check_sit_amet_with_punctuation = r'sit-amet|sit:amet'   # Pattern to check 'sit-amet' or 'sit:amet'
   to_change = r'sit amet'   # String with removed punctuation marks '-' and ':'
   replace_results = re.sub(pattern_to_check_sit_amet_with_punctuation, to_change, lorem_ipsum, flags=re.IGNORECASE)   # Substitute punctuated string to non-punctuated string (string = lorem_ipsum)
   occurrences_sit_amet = re.findall(to_change, (str(replace_results)))   # Finds and returns a list of occurences of 'sit amet' in replace_results
   print ("Number of occurences of 'sit amet in replace_results = %d" % (len(occurrences_sit_amet)))   # Print the number of occurences of 'sit amet' in replace_results using len

if __name__ == "__main__":

   original_text = '''Lorem ipsum dolor sit-amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor.
   Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo.
   Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit:amet ex nec dolor gravida
   porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum
   lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum
   elit. Sed euismod vestibulum purus ut porttitor. Integer sit-amet mollis neque. Donec sed lacinia diam, ac finibus
   lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio.'''

   lorem_ipsum = '''Lorem ipsum dolor sit-amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor.
   Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo.
   Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit:amet ex nec dolor gravida
   porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum
   lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum
   elit. Sed euismod vestibulum purus ut porttitor. Integer sit-amet mollis neque. Donec sed lacinia diam, ac finibus
   lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio.'''

   # Function calls
   check_non_alphanum()
   check_occurrences_sit_amet()
   replace_lorem_ipsum()

Images of code (for indentation reference):

1 import re def check_non_alphanum(): pattern_to_check_non_alphanum r'[^a-zA-Z0-9 _1' # Excluding Lower case and Upper case alphabets and 0-9 numbers results re.findall(pattern_to_check_non_alphanum, (str(lorem_ipsum)) # Finds and returns a list of all non-alphanumeric characters in lorem_ipsum string print("Number of occurences of non-alphanumeric characters in lorem_ipsum = %d" %(len(results))) # Prints the number of non-alphanumeric characters in lorem_ipsum string def check_occurrences_sit_amet(): pattern_to_check_sit amet_with_punctuation r'sit amet sit:amet' # Pattern to check 'sit-amet' or 'sit: amet' occurrences_sit amet re.findall(pattern_to_check_sit_amet_with_punctuation, (str(lorem_ipsum)) # Finds and returns a list of occurences of 'sit amet' or 'sit amet print ("Number of occurences of 'sit-amet' and 'sit amet' in lorem_ipsum = %d" %(len(occurrences_sit_amet))) # Prints the number of occurences of 'sit amet' or 'sit amet def replace_lorem_ipsum(): pattern_to_check_sit amet_with_punctuation r'sit amet sit:amet' # Pattern to check 'sit-amet' or 'sit:amet to change r'sit amet' # String with removed punctuation marks '-' and ':' replace_results re.sub(pattern_to_check_sit_amet_with_punctuation, to_change, lorem_ipsum, flags=re. IGNORECASE) # Substitute punctuated string to non-punctuated string (string = lorem_ipsum) occurrences sit amet re.findall(to_change, (str(replace_results))) # Finds and returns a list of occurences of 'sit amet' in replace_results print ("Number of occurences of 'sit amet in replace_results = %d" % (len(occurrences_sit_amet))) # Print the number of occurences of 'sit amet' in replace_results using len if _name _main__": 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 original_text "'Lorem ipsum dolor sit-amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor. Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo. Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit amet ex nec dolor gravida porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum elit. Sed euismod vestibulum purus ut porttitor. Integer sit amet mollis neque. Donec sed lacinia diam, ac finibus lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio."" lorem ipsum "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus iaculis velit ac nunc interdum tempor. Ut volutpat elit metus, vel auctor enim commodo at. Nunc quis quam non ligula ultricies luctus porta id justo. Quisque dapibus est ut sagittis bibendum. Mauris ullamcorper pellentesque porttitor. Ut sit amet ex nec dolor gravida porttitor. Proin at justo finibus justo vestibulum congue. Suspendisse et ipsum et ipsum eleifend dapibus a fermentum lacus. Vivamus porta nunc eu nisl sagittis, quis vulputate metus dignissim. Integer non fermentum nisl, id vestibulum elit. Sed euismod vestibulum purus ut porttitor. Integer sit amet mollis neque. Donec sed lacinia diam, ac finibus lectus. Mauris tempor ipsum nisl, vitae posuere est lacinia nec. Nam eget euismod odio."" # Function calls check_non_alphanum() check_occurrences_sit_amet() replace_lorem_ipsum()

Output of the corresponding code:

= 144 Number of occurences of non-alphanumeric characters in lorem ipsum Number of occurences of 'sit amet' and 'sit amet' in lorem ipsum Number of occurences of 'sit amet in replace_results = 3 3