




"""simple docstring"""






import numpy as np
from matplotlib import pyplot as plt
from sklearn import datasets

def       __A (     a_  :Optional[int])						->						int:
				return 1 / (1 + np.exp(-z))

def       __A (     a_  :Optional[Any]				,    a_  :int)						->						Dict:
				return (-y * np.log(__snake_case) - (1 - y) * np.log(1 - h)).mean()

def       __A (     a_  :Dict				,    a_  :Union[str, Any]				,    a_  :str)						->						Optional[int]:
				__a	:  Optional[int]         =					np.dot(__snake_case				,    __snake_case)
				return np.sum(y * scores - np.log(1 + np.exp(__snake_case)))

def       __A (     a_  :Optional[Any]				,    a_  :Any				,    a_  :Optional[int]				,    a_  :Dict=7_00_00)						->						List[str]:
				__a	:  Optional[Any]         =					np.zeros(x.shape[1])

				for iterations in range(__snake_case):
								__a	:  Any         =					np.dot(__snake_case				,    __snake_case)
								__a	:  Any         =					sigmoid_function(__snake_case)
								__a	:  str         =					np.dot(x.T				,    h - y) / y.size
								__a	:  str         =					theta - alpha * gradient  # updating the weights
								__a	:  str         =					np.dot(__snake_case				,    __snake_case)
								__a	:  str         =					sigmoid_function(__snake_case)
								__a	:  Optional[Any]         =					cost_function(__snake_case				,    __snake_case)
								if iterations % 1_00 == 0:
												print(F"""loss: {j} \t""")  # printing the loss after every 100 iterations
				return theta


# In[68]:

if __name__ == "__main__":
		A	     =					datasets.load_iris()
		A	     =					iris.data[:, :2]
		A	     =					(iris.target != 0) * 1

		A	     =					0.1
		A	     =					logistic_reg(alpha, x, y, max_iterations=70_000)
		print('''theta: ''', theta)  # printing the theta i.e our weights vector

		def       __A (     a_  :Optional[Any])						->						Dict:
						return sigmoid_function(
						    np.dot(__snake_case				,    __snake_case))  # predicting the value of probability from the logistic regression algorithm

		plt.figure(figsize=(10, 6))
		plt.scatter(x[y == 0][:, 0], x[y == 0][:, 1], color='''b''', label='''0''')
		plt.scatter(x[y == 1][:, 0], x[y == 1][:, 1], color='''r''', label='''1''')
		(A)	     =					(x[:, 0].min(), x[:, 0].max())
		(A)	     =					(x[:, 1].min(), x[:, 1].max())
		(A)	     =					np.meshgrid(np.linspace(xa_min, xa_max), np.linspace(xa_min, xa_max))
		A	     =					np.c_[xxa.ravel(), xxa.ravel()]
		A	     =					predict_prob(grid).reshape(xxa.shape)
		plt.contour(xxa, xxa, probs, [0.5], linewidths=1, colors='''black''')

		plt.legend()






		plt.show()






"""simple docstring"""






import os
import string
import sys


A	     =					1 << 8

A	     =					{
    '''tab''': ord('''\t'''),
    '''newline''': ord('''\r'''),
    '''esc''': 27,
    '''up''': 65 + ARROW_KEY_FLAG,
    '''down''': 66 + ARROW_KEY_FLAG,
    '''right''': 67 + ARROW_KEY_FLAG,
    '''left''': 68 + ARROW_KEY_FLAG,
    '''mod_int''': 91,
    '''undefined''': sys.maxsize,
    '''interrupt''': 3,
    '''insert''': 50,
    '''delete''': 51,
    '''pg_up''': 53,
    '''pg_down''': 54,
}

A	     =					KEYMAP['''up''']
A	     =					KEYMAP['''left''']

if sys.platform == "win32":
		A	     =					[]
		A	     =					{
		    B'''\xe0H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
		    B'''\x00H''': KEYMAP['''up'''] - ARROW_KEY_FLAG,
		    B'''\xe0P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
		    B'''\x00P''': KEYMAP['''down'''] - ARROW_KEY_FLAG,
		    B'''\xe0M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
		    B'''\x00M''': KEYMAP['''right'''] - ARROW_KEY_FLAG,
		    B'''\xe0K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
		    B'''\x00K''': KEYMAP['''left'''] - ARROW_KEY_FLAG,
		}

for i in range(10):
		A	     =					ord(str(i))

def       __A (     )						->						Dict:
				if os.name == "nt":
								import msvcrt

								__a	:  Optional[Any]         =					'''mbcs'''
								# Flush the keyboard buffer
								while msvcrt.kbhit():
												msvcrt.getch()
								if len(a_) == 0:
												# Read the keystroke
												__a	:  Optional[Any]         =					msvcrt.getch()

												# If it is a prefix char, get second part
												if ch in (b"\x00", b"\xe0"):
																__a	:  Optional[Any]         =					ch + msvcrt.getch()
																# Translate actual Win chars to bullet char types
																try:
																				__a	:  Union[str, Any]         =					chr(WIN_KEYMAP[cha])
																				WIN_CH_BUFFER.append(chr(KEYMAP['''mod_int''']))
																				WIN_CH_BUFFER.append(a_)
																				if ord(a_) in (
																				    KEYMAP["insert"] - 1 << 9,
																				    KEYMAP["delete"] - 1 << 9,
																				    KEYMAP["pg_up"] - 1 << 9,
																				    KEYMAP["pg_down"] - 1 << 9,
																				):
																								WIN_CH_BUFFER.append(chr(1_26))
																				__a	:  str         =					chr(KEYMAP['''esc'''])
																except KeyError:
																				__a	:  str         =					cha[1]
												else:
																__a	:  Optional[Any]         =					ch.decode(a_)
								else:
												__a	:  Union[str, Any]         =					WIN_CH_BUFFER.pop(0)
				elif os.name == "posix":
								import termios
								import tty

								__a	:  Any         =					sys.stdin.fileno()
								__a	:  List[str]         =					termios.tcgetattr(a_)
								try:
												tty.setraw(a_)
												__a	:  int         =					sys.stdin.read(1)
								finally:
												termios.tcsetattr(a_				,    termios.TCSADRAIN				,    a_)
				return ch






def       __A (     )						->						str:
				__a	:  Any         =					get_raw_chars()
				if ord(a_) in [KEYMAP["interrupt"], KEYMAP["newline"]]:
								return char

				elif ord(a_) == KEYMAP["esc"]:
								__a	:  str         =					get_raw_chars()
								if ord(a_) == KEYMAP["mod_int"]:
												__a	:  List[str]         =					get_raw_chars()
												if ord(a_) >= KEYMAP["arrow_begin"] - ARROW_KEY_FLAG and ord(a_) <= KEYMAP["arrow_end"] - ARROW_KEY_FLAG:
																return chr(ord(a_) + ARROW_KEY_FLAG)
												else:
																return KEYMAP["undefined"]
								else:
												return get_raw_chars()

				else:
								if char in string.printable:
												return char
								else:
												return KEYMAP["undefined"]