Simple, Fast, Powerful and Easily extensible python package for extracting patterns from text, with over than 60 predefined Regular Expressions.

Last update: Dec 19, 2022

Overview

patterns-finder

Simple, Fast, Powerful and Easily extensible python package for extracting patterns from text, with over than 60 predefined Regular Expressions.

This library offers the capabilities:

A set of predefined patterns with the most useful regex.
Extend the patterns, by adding user defined regex.
Find and extarct patterns from text
Pandas' Dataframe support.
Sort the results of extraction.
Summarize the results of extraction.
Display extractions by visualy rich text annotation.
Build complex extraction rules based on regex (in future release).

Installation

To install the last version of patterns-finder library, use pip:

pip install patterns-finder

Usage

Find a pattern in the text

Just import patterns, like emoji from patterns_finder.patterns.web, then you can use them to find pattern in text:

from patterns_finder.patterns.web import emoji, url, email 

emoji.find("the quick #A52A2A 🦊 jumped 3 times over the lazy 🐶 ")
# Output:
# [(18, 19, 'EMOJI', '🦊'), (49, 50, 'EMOJI', '🐶')]

url.find("The lazy 🐶 has a website https://lazy.dog.com ")
# Output:
# [(25, 45, 'URL', 'https://lazy.dog.com')]

email.find("[email protected] is the email of 🦊 ")
# Output:
# [(0, 19, 'EMAIL', '[email protected]')]

The results provided by the method find for each of pattern are in the form:

[(0, 19, 'EMAIL', '[email protected]')]
  ^  ^       ^          ^ 
  |  |       |          |
 Offset      |          └ Text matching the pattern
  |  |       └ Label of the pattern
  |  └ End index
  └ Start index in the text

Find multiple patterns in the text

To search for different patterns in the text we can use the method finder.patterns_in_text(text, patterns) as follows:

from patterns_finder import finder
from patterns_finder.patterns.web import emoji, url, color_hex
from patterns_finder.patterns.number import integer

patterns = [emoji, color_hex, integer]
text = "the quick #A52A2A 🦊 jumped 3 times over the lazy 🐶 "
finder.patterns_in_text(text, patterns)
# Output:
# [(18, 19, 'EMOJI', '🦊'),
#  (49, 50, 'EMOJI', '🐶'),
#  (10, 17, 'COLOR_HEX', '#A52A2A'),
#  (12, 14, 'INTEGER', '52'),
#  (15, 16, 'INTEGER', '2'),
#  (27, 28, 'INTEGER', '3')]

Find user defined patterns in the text

To define new pattern you can use any regex pattern that are supported by the regex and re packages of python. User defined patterns can be writen in the form of string regex pattern or tuple of string ('regex pattern', 'label').

patterns = [web.emoji, "quick|lazy", ("\\b[a-zA-Z]+\\b", "WORD") ]
text = "the quick #A52A2A 🦊 jumped 3 times over the lazy 🐶 "
finder.patterns_in_text(text, patterns)
# Output: 
# [(18, 19, 'EMOJI', '🦊'),
#  (49, 50, 'EMOJI', '🐶'),
#  (4, 9, 'quick|lazy', 'quick'),
#  (44, 48, 'quick|lazy', 'lazy'),
#  (0, 3, 'WORD', 'the'),
#  (4, 9, 'WORD', 'quick'),
#  (20, 26, 'WORD', 'jumped'),
#  (29, 34, 'WORD', 'times'),
#  (35, 39, 'WORD', 'over'),
#  (40, 43, 'WORD', 'the'),
#  (44, 48, 'WORD', 'lazy')]

Sort extraxted patterns

By using the argument sort_by of the method finder.patterns_in_text we can sort the extraction accoring to different options:

sort_by=finder.START sorts the results by the start index in the text

patterns = [web.emoji, color_hex, ('\\b[a-zA-Z]+\\b', 'WORD') ]
finder.patterns_in_text(text, patterns, sort_by=finder.START)
# Output:
# [(0, 3, 'WORD', 'the'),
#  (4, 9, 'WORD', 'quick'),
#  (10, 17, 'COLOR_HEX', '#A52A2A'),
#  (18, 19, 'EMOJI', '🦊'),
#  (20, 26, 'WORD', 'jumped'),
#  (29, 34, 'WORD', 'times'),
#  (35, 39, 'WORD', 'over'),
#  (40, 43, 'WORD', 'the'),
#  (44, 48, 'WORD', 'lazy'),
#  (49, 50, 'EMOJI', '🐶')]

sort_by=finder.END sorts the results by the end index in the text

finder.patterns_in_text(text, patterns, sort_by=finder.END)
# Output:
# [(0, 3, 'WORD', 'the'),
#  (4, 9, 'WORD', 'quick'),
#  (10, 17, 'COLOR_HEX', '#A52A2A'),
#  (18, 19, 'EMOJI', '🦊'),
#  (20, 26, 'WORD', 'jumped'),
#  (29, 34, 'WORD', 'times'),
#  (35, 39, 'WORD', 'over'),
#  (40, 43, 'WORD', 'the'),
#  (44, 48, 'WORD', 'lazy'),
#  (49, 50, 'EMOJI', '🐶')]

sort_by=finder.LABEL sorts the results by pattern's label

finder.patterns_in_text(text, patterns, sort_by=finder.LABEL)
# Output:
# [(10, 17, 'COLOR_HEX', '#A52A2A'),
#  (18, 19, 'EMOJI', '🦊'),
#  (49, 50, 'EMOJI', '🐶'),
#  (0, 3, 'WORD', 'the'),
#  (4, 9, 'WORD', 'quick'),
#  (20, 26, 'WORD', 'jumped'),
#  (29, 34, 'WORD', 'times'),
#  (35, 39, 'WORD', 'over'),
#  (40, 43, 'WORD', 'the'),
#  (44, 48, 'WORD', 'lazy')]

sort_by=finder.TEXT sorts the results by the extracted text

finder.patterns_in_text(text, patterns, sort_by=finder.TEXT)
# Output:
# [(10, 17, 'COLOR_HEX', '#A52A2A'),
#  (20, 26, 'WORD', 'jumped'),
#  (44, 48, 'WORD', 'lazy'),
#  (35, 39, 'WORD', 'over'),
#  (4, 9, 'WORD', 'quick'),
#  (0, 3, 'WORD', 'the'),
#  (40, 43, 'WORD', 'the'),
#  (29, 34, 'WORD', 'times'),
#  (49, 50, 'EMOJI', '🐶'),
#  (18, 19, 'EMOJI', '🦊')]

Summarize results of extraction

By using the argument summary_type, one can choose the desired form of output results.

summary_type=finder.NONE retruns a list with all details, without summarization.

patterns = [ color_hex, ('\\b[a-zA-Z]+\\b', 'WORD'), web.emoji ]
finder.patterns_in_text(text, patterns, summary_type=finder.NONE)
# Output:
# [(10, 17, 'COLOR_HEX', '#A52A2A'),
#  (0, 3, 'WORD', 'the'),
#  (4, 9, 'WORD', 'quick'),
#  (20, 26, 'WORD', 'jumped'),
#  (29, 34, 'WORD', 'times'),
#  (35, 39, 'WORD', 'over'),
#  (40, 43, 'WORD', 'the'),
#  (44, 48, 'WORD', 'lazy'),
#  (18, 19, 'EMOJI', '🦊'),
#  (49, 50, 'EMOJI', '🐶')]

summary_type=finder.LABEL_TEXT_OFFSET returns a dictionary of patterns labels as keys, with the corresponding offsets and text as values.

finder.patterns_in_text(text, patterns, summary_type=finder.LABEL_TEXT_OFFSET)
# Output:
# {
#  'COLOR_HEX': [[10, 17, '#A52A2A']],
#  'WORD': [[0, 3, 'the'], [4, 9, 'quick'], [20, 26, 'jumped'], [29, 34, 'times'], [35, 39, 'over'], [40, 43, 'the'], [44, 48, 'lazy']],
#  'EMOJI': [[18, 19, '🦊'], [49, 50, '🐶']]
# }

summary_type=finder.LABEL_TEXT returns a dictionary of patterns labels as keys, with the corresponding text (without offset) as values.

finder.patterns_in_text(text, patterns, summary_type=finder.LABEL_TEXT)
# Output:
# {
#  'COLOR_HEX': ['#A52A2A'],
#  'WORD': ['the', 'quick', 'jumped', 'times', 'over', 'the', 'lazy'],
#  'EMOJI': ['🦊', '🐶']
# }

summary_type=finder.TEXT_ONLY returns a list of the extracted text only.

finder.patterns_in_text(text, patterns, summary_type=finder.TEXT_ONLY)
# Output:
# ['#A52A2A', 'the', 'quick', 'jumped', 'times', 'over', 'the', 'lazy', '🦊', '🐶']

Extract patterns from Pandas DataFrame

This package provides the capability to extract patterns from Pandas' DataFrame easily, by using the method finder.patterns_in_df(df, input_col, output_col, patterns, ...).

from patterns_finder import finder
from patterns_finder.patterns import web
import pandas as pd

patterns = [web.email, web.emoji, web.url]

df = pd.DataFrame(data={
    'text': ["the quick #A52A2A 🦊 jumped 3 times over the lazy 🐶",
                    "[email protected] is the email of 🦊",
                    "The lazy 🐶 has a website https://lazy.dog.com"],
    })

finder.patterns_in_df(df, "text", "extraction", patterns, summary_type=finder.LABEL_TEXT)
# Output:
# |    | text                                                 | extraction                                          |
# |---:|:-----------------------------------------------------|:----------------------------------------------------|
# |  0 | the quick #A52A2A 🦊 jumped 3 times over the lazy 🐶 | {'EMOJI': ['🦊', '🐶']}                            |
# |  1 | [email protected] is the email of 🦊               | {'EMAIL': ['[email protected]'], 'EMOJI': ['🦊']} |
# |  2 | The lazy 🐶 has a website https://lazy.dog.com       | {'EMOJI': ['🐶'], 'URL': ['https://lazy.dog.com']}  |

The method finder.patterns_in_df have also the arguments summary_type and sort_by.

List of all predefined patterns

from patterns_finder.web import email, url, uri, mailto, html_link, sql, color_hex, copyright, alphanumeric, emoji, username, quotation, ipv4, ipv6

Phone

from patterns_finder.phone import generic, uk, us

Credit Cards

from patterns_finder.credit_card import generic, visa, mastercard, discover, american_express

Numbers

from patterns_finder.number import integer, float, scientific, hexadecimal, percent, roman

Currency

from patterns_finder.currency import monetary, symbol, code, name

Languages

from patterns_finder.language import english, french, spanish, arabic, hebrew, turkish, russian, german, chinese, greek, japanese, hindi, bangali, armenian, swedish, portoguese, balinese, georgian

Time and Date

from patterns_finder.time_date import time, date, year

Postal Code

from patterns_finder.postal_code import us, canada, uk, france, spain, switzerland, brazilian

Contact

Please email your questions or comments to me.

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Comments

Add Support for Patents patterns

Support Patent patterns w/ first implementation to support Patents globally

Example usage:

from patterns_finder.patterns.patents import global_patent
global_patent.find("Patent US5960368A is titled Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials ")
# Output:
# [(7, 16, 'PATENT', 'US5960368A')]

requesting permission to add the patterns :p

opened by mahzy 0

Simple, Fast, Powerful and Easily extensible python package for extracting patterns from text, with over than 60 predefined Regular Expressions.

Related tags

Overview

patterns-finder

Installation

Usage

Find a pattern in the text

Find multiple patterns in the text

Find user defined patterns in the text

Sort extraxted patterns

Summarize results of extraction

Extract patterns from Pandas DataFrame

List of all predefined patterns

Contact

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Add Support for Patents patterns

Releases(1.0.1)

1.0.1(Nov 26, 2022)

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