Cheat Sheet for Python Functions and Methods for Text Handling and Processing

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Here’s a list of key Python functions and methods for text handling and processing:

1. String Methods:

• str.lower(), str.upper(): Converts a string to lowercase or uppercase.
• str.strip(): Removes leading and trailing whitespaces.
• str.replace(): Replaces a specified value with another value.
• str.split(): Splits a string into a list of substrings.
• str.join(): Joins elements of a list into a single string.
• str.find(), str.index(): Finds the index of a substring in a string.

2. Regular Expressions (re module):

• re.match(), re.search(), re.findall(): Performs regular expression operations.
• re.sub(): Replaces occurrences of a pattern in a string.

3. NLTK (Natural Language Toolkit):

• nltk.word_tokenize(): Tokenizes a text into words.
• nltk.sent_tokenize(): Tokenizes a text into sentences.
• nltk.pos_tag(): Tags parts of speech in a sentence.
• nltk.FreqDist(): Computes the frequency distribution of words.