如何使循环写入文件python

Question

I'm trying to save the currency rates I get from the yahoo finance API to a .txt file as a while loop while the other thread is reading it and writing a graph with it. For some reason it won't write to the file so the entire program won't work

def thread(spot=1):
    while spot >60:
        savedFile.write(str(currencies.get_rate()) + ',' + str(spot) + '\n')
        spot += 1
        time.sleep(1)

Answer 1

While the data is in the buffer, you can't read it into the other thread. You should flush the file. The tells the OS to push the buffer to disk.

def thread(spot=1):
    while spot >60:
        savedFile.write(str(currencies.get_rate()) + ',' + str(spot) + '\n')
        savedFile.flush()
        spot += 1
        time.sleep(1)

Answer 2

Try giving stricter limitations to the loop. If you want it to write until it drops below 60 then give a maximum number to write to the file. One way to do it would be with an if statement and use the same counter.