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대용량 파일에 대해 여러 작업을 수행하는 함수를 다중 처리하려고하지만 partial을 사용하는 알려진 오류 pickling 오류가 발생합니다.다중 인수를 사용하는 파이썬 다중 처리
기능은 다음과 같은 :
def process(r,intermediate_file,record_dict,record_id):
res=0
record_str = str(record_dict[record_id]).upper()
start = record_str[0:100]
end= record_str[len(record_seq)-100:len(record_seq)]
print sample, record_id
if r=="1":
if something:
res = something...
intermediate_file.write("...")
if something:
res = something
intermediate_file.write("...")
if r == "2":
if something:
res = something...
intermediate_file.write("...")
if something:
res = something
intermediate_file.write("...")
return res
는 다른 함수에 따르고 호출 방법 메신저 :
def call_func():
intermediate_file = open("inter.txt","w")
record_dict = get_record_dict() ### get infos about each record as a dict based on the record_id
results_dict = {}
pool = Pool(10)
for a in ["a","b","c",...]:
if not results_dict.has_key(a):
results_dict[a] = {}
for b in ["1","2","3",...]:
if not results_dict[a].has_key(b):
results_dict[a][b] = {}
results_dict[a][b]['res'] = []
infile = open(a+b+".txt","r")
...parse the file and return values in a list called "record_ids"...
### now call the function based on for each record_id in record_ids
if b=="1":
func = partial(process,"1",intermediate_file,record_dict)
res=pool.map(func, record_ids)
## append the results for each pair (a,b) for EACH RECORD in the results_dict
results_dict[a][b]['res'].append(res)
if b=="2":
func = partial(process,"2",intermediate_file,record_dict)
res = pool.map(func, record_ids)
## append the results for each pair (a,b) for EACH RECORD in the results_dict
results_dict[a][b]['res'].append(res)
... do something with results_dict...
아이디어는 record_ids 내부의 각 레코드에 대해, 내가 원하는 것입니다 각 쌍 (a, b)에 대한 결과를 저장합니다.
나는 날이 오류를주고있다 모르겠어요 :
File "/code/Python/Python-2.7.9/Lib/multiprocessing/pool.py", line 251, in map
return self.map_async(func, iterable, chunksize).get()
File "/code/Python/Python-2.7.9/Lib/multiprocessing/pool.py", line 558, in get
raise self._value
cPickle.PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function faile
D가 절인 수 없도록