问题
Can anyone tell me how to resume a download? I'm using urlretrieve function. If there is an interruption, the download restarts from the beginning. I want the program to read the size of localfile (which I m able to do) and then resume the download from that very byte onwards.
来源：https://stackoverflow.com/questions/3581296/how-to-resume-download-in-python-using-urlretrieve-function