My Python program sends an image to my web server through FTP, but occasionally upon arrival, partial data is lost from the transferred image. The program takes a screenshot every x amount of seconds and then uploads the image to the web server.
My web hosting provider thinks it must be coming from the Python program itself, so please let me know what I'm doing wrong to cause this issue.
Image(What it looks like when pulled from the web server): 
Code:
def ftp(self): # Screen Grab and FTP Transfer
new = ImageGrab.grab(bbox=(0, 50, 1366, 720))
new = new.resize((1366, 700), PIL.Image.ANTIALIAS)
new.save("C:\\Users\\Owner\\Desktop\\screenshots\\capture.jpg")
newOpen = PIL.Image.open("C:\\Users\\user\\Desktop\\screenshots\\capture.jpg")
newOpen.save("C:\\Users\\Owner\\Desktop\\screenshots\\capture.jpg", format="JPEG", quality=40)
tries = 10 # Denotes maximum try limit for retry attempts
for i in range(tries):
try:
# FTP image to Web Server
session = ftplib.FTP('server', 'user', 'pass')
file = open('C:\\Users\\Owner\\Desktop\\screenshots\\capture.jpg', 'rb') # file to send
session.storbinary('STOR capture.jpg', file) # send the file
file.close() # close file and FTP
session.quit()
value = "Updated. \nFailed " + str(i) + " Times\n" + str(self.tick)
print value
self.tick += 1
except KeyError as e:
if i < tries - 1: # i is zero indexed
continue
else:
raise
break
threading.Timer(5, self.ftp).start()
