def has_data(ticker, start, end):
""" returns whether this data source has data available for the specified asset and date range """
#import pdb; pdb.set_trace()
try:
f = open(os.path.join(c.data_dir,ticker+'.csv'))
utils.consume(f,1)
last = utils.date_from(f.next().split(',')[0])
f.seek(-100,os.SEEK_END)
tail = f.read().splitlines()
first = utils.date_from(tail[len(tail)-1].split(',')[0])
return (first <= start and last >= end)
except IOError:
return False
def has_data(ticker, start, end):
""" returns whether this data source has data available for the specified asset and date range """
#import pdb; pdb.set_trace()
try:
f = open(os.path.join(c.data_dir, ticker + '.csv'))
utils.consume(f, 1)
last = utils.date_from(f.next().split(',')[0])
f.seek(-100, os.SEEK_END)
tail = f.read().splitlines()
first = utils.date_from(tail[len(tail) - 1].split(',')[0])
return (first <= start and last >= end)
except IOError:
return False
def get_data(ticker, start, end):
"""Returns price data for the given ticker between the given dates as a list of Quotes"""
if not has_data(ticker, start, end):
return None
else:
csv = open(os.path.join(c.data_dir, ticker+'.csv'))
csv.next()
lines = deque()
for line in csv:
d=utils.date_from(line.split(',')[0])
if(d >= start and d <= end):
lines.append(line)
return lines
def get_data(ticker, start, end):
"""Returns price data for the given ticker between the given dates as a list of Quotes"""
if not has_data(ticker, start, end):
return None
else:
csv = open(os.path.join(c.data_dir, ticker + '.csv'))
csv.next()
lines = deque()
for line in csv:
d = utils.date_from(line.split(',')[0])
if (d >= start and d <= end):
lines.append(line)
return lines