Python 无法加载腌制对象
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Cannot load pickled object
提问by Houdini
The problem I am having is when I try to load the pickledobject. I have tried using both pickle.loadsand pickle.loadHere are the results:
我遇到的问题是当我尝试加载腌制对象时。我尝试使用两者pickle.loads，pickle.load结果如下：
pickle.loads:
pickle.loads：
TypeError: 'str' does not support the buffer interface
TypeError: 'str' 不支持缓冲区接口
pickle.load:
pickle.load：
TypeError: file must have 'read' and 'readline' attributes
类型错误：文件必须具有“read”和“readline”属性
Can someone please tell me what I am doing wrong in this process?
有人可以告诉我在这个过程中我做错了什么吗？
elif str(parser) == "SwissWithdrawn_Parser":
# swissprot name changes
print("Gathering SwissProt update info...")
cache_hits = 0
cache_misses = 0
files = set()
for f in os.listdir("out/cache/"):
if os.path.isfile("out/cache/" + f):
files.add(f)
for name in sp_lost_names:
cached = False
url = (
"http://www.uniprot.org/uniprot/?query=mnemonic%3a"
+ name
+ "+active%3ayes&format=tab&columns=entry%20name"
)
hashed_url = str(hash(url))
################### For Testing Only - use cache ##################
if hashed_url in files:
cached = True
cache_hits += 1
content = pickle.loads("out/cache/" + hashed_url) # <-- problematic line
else:
cache_misses += 1
content = urllib.request.urlopen(url)
# get the contents returned from the HTTPResponse object
content_list = [x.decode().strip() for x in content.readlines()]
if not cached:
with open("out/cache/" + hashed_url, "wb") as fp:
pickle.dump(content_list, fp)
####################################################################
# no replacement
if len(content_list) is 0:
change_log["swiss-names"] = {name: "withdrawn"}
# get the new name
else:
new_name = content_list[1]
change_log["swiss-names"] = {name: new_name}
采纳答案by Martijn Pieters
You need to either readthe file first (as binary bytes) and use pickle.loads(), or pass an open file object to the pickle.load()command. The latter is preferable:
您需要先读取文件（作为 binary bytes）并使用pickle.loads()，或者将打开的文件对象传递给pickle.load()命令。后者更可取：
with open('out/cache/' +hashed_url, 'rb') as pickle_file:
content = pickle.load(pickle_file)
Neither method supports loading a pickle from a filename.
这两种方法都不支持从文件名加载泡菜。
