import cv2
import time
import datetime

cap = cv2.VideoCapture(0)

face_cascade = cv2.CascadeClassifier(
    cv2.data.haarcascades + "haarcascade_frontalface_default.xml")
body_cascade = cv2.CascadeClassifier(
    cv2.data.haarcascades + "haarcascade_fullbody.xml")

detection = False
detection_stopped_time = None
timer_started = False
SECONDS_TO_RECORD_AFTER_DETECTION = 5

frame_size = (int(cap.get(3)), int(cap.get(4)))
fourcc = cv2.VideoWriter_fourcc(*"mp4v")

while True:
    _, frame = cap.read()

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    bodies = face_cascade.detectMultiScale(gray, 1.3, 5)

    if len(faces) + len(bodies) > 0:
        if detection:
            timer_started = False
        else:
            detection = True
            current_time = datetime.datetime.now().strftime("%d-%m-%Y-%H-%M-%S")
            out = cv2.VideoWriter(
                f"{current_time}.mp4", fourcc, 20, frame_size)
            print("Started Recording!")
    elif detection:
        if timer_started:
            if time.time() - detection_stopped_time >= SECONDS_TO_RECORD_AFTER_DETECTION:
                detection = False
                timer_started = False
                out.release()
                print('Stop Recording!')
        else:
            timer_started = True
            detection_stopped_time = time.time()

    if detection:
        out.write(frame)

    # for (x, y, width, height) in faces:
    #    cv2.rectangle(frame, (x, y), (x + width, y + height), (255, 0, 0), 3)

    cv2.imshow("Camera", frame)

    if cv2.waitKey(1) == ord('q'):
        out.release()
        cap.release()
        break

cv2.destroyAllWindows()

#@Syntax_fa

pip install opencv-python

class Solution(object):
    def twoSum(self, nums, target):
        checked = {}
        for index, num in enumerate(nums, start=0):
            index2 = checked.get(target - num)
            if index2 is not None:
                return [index2, index]
            checked[num] = index
        return [0, 0]

 Go
func twoSumWithMakeMapAndExtraAssign(nums []int, target int) []int {
  checked := make(map[int]int)
  for index, num := range nums {
    complete := target - num
    if _, ok := checked[complete]; ok {
      return []int{checked[complete], index}
    }
    checked[num] = index
  }
  return []int{}
}

Input: s = "abcabcbb" 
Output: 3 

Explanation: The answer is "abc", with the length of 3

Input: s = "bbbbb"
Output: 1 

Explanation: The answer is "b", with the length of 1. 

Input: s = "pwwkew"
Output: 4

ورودی1: salam
ورودی2: 4

خروجی: m

ورودی1: salam
ورودی2: 5

خروجی: string index out of range

myList = []
myList += ["new data"]

ورودی1: 3
ورودی1-1: A
ورودی1-2: B
ورودی1-3: C

ورودی2: 3
ورودی2-1: 1
ورودی2-2: 2
ورودی2-3: 3

خروجی: ["A", "B", "C", "1", "2", "3"]

print(12.5.as_integer_ratio())  # (25, 2)

ورودی: 3.14

خروجی: (50, 157)