Python Regular Expressions Set-I

Regular Expressions in Python

• The re.match function in Python searches the string for a match against the regular expression, and returns a match object if the string matches the pattern.
• The regular expression http[s]?://.+? matches a URL that starts with http or https, followed by ://, and then any characters (the .+? is a lazy match for any characters).

Web Programming in Python

• The http protocol can be used to retrieve web pages using Python.
• DOM (Document Object Model) in the context of web programming represents a document as a tree of nodes, allowing programmers to interact with the document's structure and content.

Python Modules

• The re module in Python supports regular expressions.
• The pickle module in Python is used for serialization and deserialization of Python objects.

Pickling in Python

• The process of pickling in Python includes serializing an object into a byte stream, and then deserializing it back into an object.
• The purpose of the pickle module is to serialize Python objects into a byte stream, and then reconstruct them later.
• The Python command pickle.dump() is used to serialize an object using the pickle module.
• The pickle module raises a PicklingError when encountering an unpicklable object.
• The __getstate__() function in Python's pickle module is used to customize the pickling process by returning a dictionary of the object's state.