我正在使用IBAPI来收集历史股票报价,目前,我正在使用以下代码来实现这一目标:
chainStyle="packed
此代码起初运行良好,但突然返回了我仅一行文本,而不是请求附带的所有行。
这里有人可以尝试帮助我找出问题所在吗?
应该写入文本文件的代码是:
from ibapi.client import EClient
from ibapi.wrapper import EWrapper
from ibapi.contract import Contract
def print_to_file(*args):
with open('text2.txt', 'w') as fh:
fh.write(' '.join(map(str,args)))
fh.write('\n')
fh.close()
print = print_to_file
class TestApp(EWrapper, EClient):
def __init__(self):
EClient.__init__(self, self)
Layout = "{!s:1} {!s:2} {!s:3} {!s:4} {!s:5} {!s:6} {!s:7} {!s:8} {!s:8} '\n'"
print(Layout.format("Ticker;", "Date;", "None;", "Time;", "Open;", "High;", "Low;", "Close;", "Volume", '\n'))
def historicalData(self, reqId, bar):
print("AAPL", ";", bar.date.replace(' ', '; '), ";", bar.open, ";", bar.high, ";", bar.low, ";", bar.close, ";", bar.volume)
def main():
app = TestApp()
app.connect("127.0.0.1", 7497, 0)
contract = Contract ()
contract.symbol = "AAPL"
contract.secType = "STK"
contract.exchange = "SMART"
contract.currency = "USD"
contract.primaryExchange = "NASDAQ"
app.reqHistoricalData(0, contract, "", "1 D", "1 min", "TRADES", 0, 1, False, [])
app.run()
if __name__ == "__main__":
main()
如果我让代码而不是文件写入终端,那么我会得到整个请求,而不仅仅是一行。
谢谢!
答案 0 :(得分:0)
文件以“ w”模式打开,因此该函数在每次打开时都会将其截断。 应当使用模式“ a”。
https://docs.python.org/3/library/functions.html#open
'w'打开进行写入,首先将文件截断
'a'可供写入,如果存在则追加到文件末尾