"""simple docstring"""
from __future__ import annotations

SCREAMING_SNAKE_CASE__      						=  "Muhammad Umer Farooq"
SCREAMING_SNAKE_CASE__      						=  "MIT"
SCREAMING_SNAKE_CASE__      						=  "1.0.0"
SCREAMING_SNAKE_CASE__      						=  "Muhammad Umer Farooq"
SCREAMING_SNAKE_CASE__      						=  "contact@muhammadumerfarooq.me"
SCREAMING_SNAKE_CASE__      						=  "Alpha"

import re
from html.parser import HTMLParser
from urllib import parse

import requests



class   lowerCAmelCase_    (			lowerCAmelCase					):



				"""simple docstring"""

				def __init__(				self		,    lowerCAmelCase    ):






										"""simple docstring"""

										super().__init__()
										snake_case								=			[]
										snake_case								=			domain

				def 		snake_case (				self		,    lowerCAmelCase		,    lowerCAmelCase    ):






										"""simple docstring"""

										if tag == "a":
																# Check the list of defined attributes.
																for name, value in attrs:
																						# If href is defined, and not empty nor # print it.
																						if name == "href" and value != "#" and value != "":
																												# If not already in urls.
																												if value not in self.urls:
																																		snake_case								=			parse.urljoin(self.domain		,    lowerCAmelCase    )
																																		self.urls.append(lowerCAmelCase    )





def    lowerCAmelCase__    (			_UpperCamelCase       :				str					)					->				str:





						"""simple docstring"""






						return ".".join(get_sub_domain_name(_UpperCamelCase					).split('.'					)[-2:]					)





def    lowerCAmelCase__    (			_UpperCamelCase       :				str					)					->				str:





						"""simple docstring"""






						return parse.urlparse(_UpperCamelCase					).netloc





def    lowerCAmelCase__    (			_UpperCamelCase       :				str = "https://github.com"					)					->				list[str]:





						"""simple docstring"""






						snake_case								=			get_domain_name(_UpperCamelCase					)

						# Initialize the parser
						snake_case								=			Parser(_UpperCamelCase					)

						try:
												# Open URL
												snake_case								=			requests.get(_UpperCamelCase					)

												# pass the raw HTML to the parser to get links
												parser.feed(r.text					)

												# Get links and loop through
												snake_case								=			set()
												for link in parser.urls:
																		# open URL.
																		# read = requests.get(link)
																		try:
																								snake_case								=			requests.get(_UpperCamelCase					)
																								# Get the valid email.
																								snake_case								=			re.findall('[a-zA-Z0-9]+@' + domain ,			read.text					)
																								# If not in list then append it.
																								for email in emails:
																														valid_emails.add(_UpperCamelCase					)
																		except ValueError:
																								pass
						except ValueError:
												raise SystemExit(1					)

						# Finally return a sorted list of email addresses with no duplicates.
						return sorted(_UpperCamelCase					)


if __name__ == "__main__":
					SCREAMING_SNAKE_CASE__      						=  emails_from_url("https://github.com")
					print(f"""{len(emails)} emails found:""")
					print("\n".join(sorted(emails)))



"""simple docstring"""
import math





def    lowerCAmelCase__    (			_UpperCamelCase       :				float ,			_UpperCamelCase       :				float					)					->				float:





						"""simple docstring"""






						if initial_intensity < 0:
												raise ValueError('The value of intensity cannot be negative'					)
												# handling of negative values of initial intensity
						if angle < 0 or angle > 3_6_0:
												raise ValueError('In Malus Law, the angle is in the range 0-360 degrees'					)
												# handling of values out of allowed range
						return initial_intensity * (math.cos(math.radians(_UpperCamelCase					)					) ** 2)


if __name__ == "__main__":
					import doctest

					doctest.testmod(name="malus_law")


