regex_example.py

import re

THE_STRING = (
    "This is a string with a number in it: 12345\n"
    "Now is the time for all good men to come to the aid of their country.\n"
    "See the quick red fox jump over the lazy brown dog.\n"
)

# Code above this comment line was manually typed in.
# All following code was generated by Copilot based on the comment prompts.  There are some minor edits
# for purposes of formatting the output.  None of the regular expressions generated by Copilot were modified.


# function to print all matches in a regular expression
def print_matches(pattern, string):
    print(f"Pattern: {pattern}")
    print(f"String: {string}")
    print(">>>Matches:")
    for match in re.finditer(pattern, string):
        print(f"  {match.group()}")
    print()


# function to count the number of occurrences of a regular expression
def count_matches(pattern, string):
    print(f"Pattern: {pattern}")
    print(f"String: {string}")
    print(">>>Count of Matches:")
    print(len(re.findall(pattern, string)))
    print()

# function to print all lines with a match in a regular expression
def print_lines(pattern, string):
    print(f"Pattern: {pattern}")
    print(f"String: {string}")
    print(">>>Lines with Matches:")
    for match in re.finditer(pattern, string):
        print(f"  {match.group()}")
    print()


if __name__ == "__main__":
    print_matches("the", THE_STRING)

    # regular expression to find all strings with the phrase "all good men"  Commentary: this did not produce any recommended code.

    # regular expression to find words that start with "g" and end with "d"
    print_matches(r"\b\w*g\w*d\b", THE_STRING)

    # regular expression with look behind of "the" and look ahead of "to"
    print_matches(r"(?<=the).+(?=to)", THE_STRING)

    # print all words that start with "t" or "T" and end with a consonant
    print_matches(r"\b[tT]\w+[bcdfghjklmnpqrstvwxyz]\b", THE_STRING)

    # regular expression to find numbers
    print_matches(r"\d+", THE_STRING)

    # count the number of words in the string
    count_matches(r"\w+", THE_STRING)

    # count number of words that start with "t"
    count_matches(r"\bt\w+", THE_STRING)

    # count number of words that start with "t" or "T"
    count_matches(r"\b[tT]\w+", THE_STRING)

    # print lines that contain the word "the"
    print_lines(r".*the.*", THE_STRING)

    # print lines that contain a word with the letter "z"
    print_lines(r".*\w*z\w*.*", THE_STRING)