Taking screenshots with PIL

问题

I'm working on script that take screenshot every 1 min but there is one problem that when I save it gives me invalid argument and I don't know why that is.

Code:

from PIL import ImageGrab
from PIL import Image
import time
import datetime
import os

def screenShot():
    while True:
        try:
            date = str(datetime.date.today())
            hour=str(datetime.datetime.now().strftime("%H"))
            os.makedirs("D:/mine/" + date + "/" + hour)
        except OSError,e:
            if e.errno != 17:
                raise
            time.sleep(1)
            pass
        while True:
            date = str(datetime.date.today())
            hour = str(datetime.datetime.now().strftime("%H"))
            date_time = str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
            img = ImageGrab.grab()
            FILES_DIR = 'mine'
            SAVE_PATH = "D:/"
            LOGFILE_NAME = "%s.png" % date_time
            LOGFILE_PATH = os.path.join(SAVE_PATH, FILES_DIR, LOGFILE_NAME)
            img.save(LOGFILE_PATH)
            break
        time.sleep(60)

screenShot()

This is the error I'm getting:

IOError: [Erno 22] Invalid argument: 'D:/mine\\2016-12-02 20:24:37.png'

I searched a lot and I found this code and it worked but I can't see different between this code and my code.

import os
import sys
import time
from PIL import ImageGrab
from PIL import Image
from os import environ
import random
n = -1
while True:
    n += 1
    # generate a random time between 120 and 300 sec
    random_time = random.randrange(1,2)
    # wait between 120 and 300 seconds (or between 2 and 5 minutes)
    print "Next picture in: %.2f minutes" % (float(random_time) / 60)
    time.sleep(random_time)
    img = ImageGrab.grab()
    FILES_DIR = 'mine'
    SAVE_PATH = "D:/"
    #SAVE_PATH = os.path.expanduser("~")    #It is cross-platform
    LOGFILE_NAME = "test{n:0>5}.png".format(n = n)
    LOGFILE_PATH = os.path.join(SAVE_PATH, FILES_DIR, LOGFILE_NAME)
    print LOGFILE_PATH
    img.save(LOGFILE_PATH)

I'm forgetting something but I don't know what is it.

回答1:

Make sure the SAVE_PATH and FILES_DIR are valid meaning they exist in your hard drive and the path should be absolute path. for example in linux it would be ~/D/mine in your case it should be D:\mine instead of D:/mine also strftime("%Y-%m-%d %H:%M:%S") should be strftime("%Y-%m-%d %H.%M.%S")

回答2:

D:/mine\2016-12-02 20:24:37.png. You must have formatted something wrong if it has "/" and "\". And also, same as the other people: you can't create files with colons.

来源：https://stackoverflow.com/questions/40938868/taking-screenshots-with-pil

标签

python

python-imaging-library

pillow