Check and wait until a file exists to read it

Question

I need to wait until a file is created then read it in. I have the below code, but sure it does not work:

import os.path
if os.path.isfile(file_path):
    re         


        

Answer 1

This code can check download by file size.

import os, sys
import time

def getSize(filename):
    if os.path.isfile(filename): 
        st = os.stat(filename)
        return st.st_size
    else:
        return -1

def wait_download(file_path):
    current_size = getSize(file_path)
    print("File size")
    time.sleep(1)
    while current_size !=getSize(file_path) or getSize(file_path)==0:
        current_size =getSize(file_path)
        print("current_size:"+str(current_size))
        time.sleep(1)# wait download
    print("Downloaded")