以下代码是程序的一部分，旨在从Bloomberg终端捕获数据并将其转储到SQLite数据库中。它在我的32位Windows XP上运行得很好。但它一直在给我 64位Windows 7上的“get_history.histfetch错误：[Errno 9]错误文件描述符”，尽管在64位操作系统下使用32位python应该没有问题。有时这个问题可以通过退出程序并再次打开它来解决，但有时它只是不起作用。现在我真的很困惑导致这个问题的原因。我查看了源代码，发现问题是在调用“histfetch”时生成的，我不知道代码的哪一部分失败了。有人可以帮我从这里出去吗...？我真的很感激。提前谢谢。
def run(self):
try: pythoncom.CoInitializeEx(pythoncom.COINIT_APARTMENTTHREADED)
except: pass
while 1:
if self.trigger:
try: self.histfetch()
except Exception,e:
logging.error('get_history.histfetch error: %s %s' % (str(type(e)),str(e)))
if self.errornotify != None:
self.errornotify('get_history error','%s %s' % ( str(type(e)), str(e) ) )
self.trigger = 0
if self.telomere: break
time.sleep(0.5)
def histfetch(self):
blpcon = win32com.client.gencache.EnsureDispatch('blpapicom.Session')
blpcon.Start()
dbcon = sqlite3.connect(self.dbfile)
c = dbcon.cursor()
fieldcodes = {}
symcodes = {}
trysleep(c,'select fid,field from fields')
for fid,field in c.fetchall():
# these are different types so this will be ok
fieldcodes[fid] = field
fieldcodes[field] = fid
trysleep(c,'select sid,symbol from symbols')
for sid,symbol in c.fetchall():
symcodes[sid] = symbol
symcodes[symbol] = sid
for instr in self.instructions:
if instr[1] != 'minute': continue
sym,rollspec = instr[0],instr[2]
print 'MINUTE',sym
limits = []
sid = getsid(sym,symcodes,dbcon,c)
trysleep(c,'select min(epoch),max(epoch) from minute where sid=?',(sid,))
try: mine,maxe = c.fetchone()
except: mine,maxe = None,None
print sym,'minute data limits',mine,maxe
rr = getreqrange(mine,maxe)
if rr == None: continue
start,end = rr
dstart = start.strftime('%Y%m%d')
dend = end.strftime('%Y%m%d')
try: # if rollspec is 'noroll', then this will fail and goto except-block
ndaysbefore = int(rollspec)
print 'hist fetch for %s, %i days' % (sym,ndaysbefore)
rolldb.update_roll_db(blpcon,(sym,))
names = rolldb.get_contract_range(sym,ndaysbefore)
except: names = {sym:None}
# sort alphabetically here so oldest always gets done first
# (at least within the decade)
sorted_contracts = names.keys()
sorted_contracts.sort()
for contract in sorted_contracts:
print 'partial fetch',contract,names[contract]
if names[contract] == None:
_start,_end = start,end
else:
da,db = names[contract]
dc,dd = start,end
try: _start,_end = get_overlap(da,db,dc,dd)
except: continue # because get_overlap returning None cannot assign to tuple
# localstart and end are for printing and logging
localstart = _start.strftime('%Y/%m/%d %H:%M')
localend = _end.strftime('%Y/%m/%d %H:%M')
_start = datetime.utcfromtimestamp(time.mktime(_start.timetuple())).strftime(self.blpfmt)
_end = datetime.utcfromtimestamp(time.mktime(_end.timetuple())).strftime(self.blpfmt)
logging.debug('requesting intraday bars for %s (%s): %s to %s' % (sym,contract,localstart,localend))
print 'start,end:',localstart,localend
result = get_minute(blpcon,contract,_start,_end)
if len(result) == 0:
logging.error('warning: 0-length minute data fetch for %s,%s,%s' % (contract,_start,_end))
continue
event_count = len(result.values()[0])
print event_count,'events returned'
lap = time.clock()
# todo: split up writes: no more than 5000 before commit (so other threads get a chance)
# 100,000 rows is 13 seconds on my machine. 5000 should be 0.5 seconds.
try:
for i in range(event_count):
epoch = calendar.timegm(datetime.strptime(str(result['time'][i]),'%m/%d/%y %H:%M:%S').timetuple())
# this uses sid (from sym), NOT contract
row = (sid,epoch,result['open'][i],result['high'][i],result['low'][i],result['close'][i],result['volume'][i],result['numEvents'][i])
trysleep(c,'insert or ignore into minute (sid,epoch,open,high,low,close,volume,nevents) values (?,?,?,?,?,?,?,?)',row)
dbcon.commit()
except Exception,e:
print 'ERROR',e,'iterating result object'
logging.error(datetime.now().strftime() + ' error in get_history.histfetch writing DB')
# todo: tray notify the error and log it
lap = time.clock() - lap
print 'database write of %i rows in %.2f seconds' % (event_count,lap)
logging.debug(' -- minute bars %i rows (%.2f s)' % (event_count,lap))
for instr in self.instructions:
oldestdaily = datetime.now().replace(hour=0,minute=0,second=0,microsecond=0) - timedelta(self.dailyback)
sym = instr[0]
if instr[1] != 'daily': continue
print 'DAILY',sym
fields = instr[2]
rollspec = instr[3]
sid = getsid(sym,symcodes,dbcon,c)
unionrange = None,None
for f in fields:
try: fid = fieldcodes[f]
except:
trysleep(c,'insert into fields (field) values (?)',(f,))
trysleep(c,'select fid from fields where field=?',(f,))
fid, = c.fetchone()
dbcon.commit()
fieldcodes[fid] = f
fieldcodes[f] = fid
trysleep(c,'select min(epoch),max(epoch) from daily where sid=? and fid=?',(sid,fid))
mine,maxe = c.fetchone()
if mine == None or maxe == None:
unionrange = None
break
if unionrange == (None,None):
unionrange = mine,maxe
else:
unionrange = max(mine,unionrange[0]),min(maxe,unionrange[1])
print sym,'daily unionrange',unionrange
yesterday = datetime.now().replace(hour=0,minute=0,second=0,microsecond=0) - timedelta(days=1)
if unionrange == None:
reqrange = oldestdaily,yesterday
else:
mine = datetime.fromordinal(unionrange[0])
maxe = datetime.fromordinal(unionrange[1])
print 'comparing',mine,maxe,oldestdaily,yesterday
if oldestdaily < datetime.fromordinal(unionrange[0]): a = oldestdaily
else: a = maxe
reqrange = a,yesterday
if reqrange[0] >= reqrange[1]:
print 'skipping daily',sym,'because we\'re up to date'
continue
print 'daily request range',sym,reqrange,reqrange[0] > reqrange[1]
try:
ndaysbefore = int(rollspec) # exception if it's 'noroll'
print 'hist fetch for %s, %i days' % (sym,ndaysbefore)
rolldb.update_roll_db(blpcon,(sym,))
names = rolldb.get_contract_range(sym,ndaysbefore,daily=True)
except: names = {sym:None}
# sort alphabetically here so oldest always gets done first
# (at least within the year)
sorted_contracts = names.keys()
sorted_contracts.sort()
start,end = reqrange
for contract in sorted_contracts:
print 'partial fetch',contract,names[contract]
if names[contract] == None:
_start,_end = start,end
else:
da,db = names[contract]
dc,dd = start,end
try: _start,_end = get_overlap(da,db,dc,dd)
except: continue # because get_overlap returning None cannot assign to tuple
_start = _start.strftime('%Y%m%d')
_end = _end.strftime('%Y%m%d')
logging.info('daily bars for %s (%s), %s - %s' % (sym,contract,_start,_end))
result = get_daily(blpcon,(contract,),fields,_start,_end)
try: result = result[contract]
except:
print 'result doesn\'t contain requested symbol'
logging.error("ERROR: symbol '%s' not in daily request result" % contract)
# todo: log and alert error
continue
if not 'date' in result:
print 'result has no date field'
logging.error('ERROR: daily result has no date field')
# todo: log and alert error
continue
keys = result.keys()
keys.remove('date')
logging.info(' -- %i days returned' % len(result['date']))
for i in range(len(result['date'])):
ordinal = datetime.fromtimestamp(int(result['date'][i])).toordinal()
for k in keys:
trysleep(c,'insert or ignore into daily (sid,fid,epoch,value) values (?,?,?,?)',(sid,fieldcodes[k],ordinal,result[k][i]))
dbcon.commit()
答案 0 :(得分：1)
打印完整的回溯，而不仅仅是异常消息。回溯将显示引发异常的位置，以及问题所在：
import traceback
...
try: self.histfetch()
except Exception,e:
logging.error('get_history.histfetch error: %s %s' % (str(type(e)),str(e)))
logging.error(traceback.format_exc())
if self.errornotify != None:
self.errornotify('get_history error','%s %s' % ( str(type(e)), str(e) ) )
更新：
通过以上（或类似的，想法是查看完整的追溯），你说：
它说这是“打印”功能。禁用所有“打印”功能后，该程序运行良好。
{post}使用的print函数调用只在python 2.x中有效。如果你正在使用它，那么运行你的脚本的应用程序可能是未定义的print并且你应该使用日志函数，否则我看不出调用有什么问题（除非你的意思是只有一个）印刷品是问题，然后我需要看到确切的错误来识别 - 发布这个，如果你想弄清楚这一点）。如果您使用的是Python 3.x，则必须使用print(a, b, c, ...)，请参阅3.x文档。