Added camera test files to test.py

test.py

+"""
+This File tests if a camera is connected and working
+It should display a live stream in grayscale
+"""
+
 print("Hallo, Welt!")
-print("Hallo, Welt 2 !")
+
+
+
+
+import numpy as np
+import cv2 as cv
+cap = cv.VideoCapture(0)
+if not cap.isOpened():
+    print("Cannot open camera")
+    exit()
+while True:
+    # Capture frame-by-frame
+    ret, frame = cap.read()
+    # if frame is read correctly ret is True
+    if not ret:
+        print("Can't receive frame (stream end?). Exiting ...")
+        break
+    # Our operations on the frame come here
+    gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)
+    # Display the resulting frame
+    cv.imshow('frame', gray)
+    if cv.waitKey(1) == ord('q'):
+        break
+# When everything done, release the capture
+cap.release()
+cv.destroyAllWindows()