如何每秒刷新 Python 中的 csv 导出？

Question

I have this code for python that looks up an API key and writes into a file the findings. How can I make this refresh the contents of the file every one second?

import requests
import csv

r = requests.get('https://api.kraken.com/0/public/Trades?pair=XBTUSD').json()

c = csv.writer(open("order_book", "w"), lineterminator='\n')

for item in r['result']['XXBTZUSD']:
    c.writerow(item)

Answer 1

Schedule ( https://pypi.python.org/pypi/schedule ) seemed to be what you need.

You will have to install their Python library:

pip install schedule

then modify the sample script:

import schedule
import time

def job():

schedule.every(1).seconds.do(job)

while True:
    schedule.run_pending()
    time.sleep(1)

With your own function in job() and use the needed call for your timing.

Then you can run it with nohup.

Be advised that yu will need to start it again if you reboot.

here is the docs

Answer 2

thank you! it worked!

import requests
import csv
import schedule
import time


def job():
    r = requests.get('https://api.kraken.com/0/public/Trades?pair=XBTUSD').json()
    c = csv.writer(open("order_book", "w"), lineterminator='\n')
    for item in r['result']['XXBTZUSD']:
        c.writerow(item)


schedule.every(1).seconds.do(job)

while True:
    schedule.run_pending()
    time.sleep(1)