pickle

问题 I´m trying to do a multiprocessing scrape of a website, where I get a list of all the nodes I want to get information from, and then generate a Pool so instead of getting data one by one it does in parallel. My code is the following: from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support import expected_conditions as EC import multiprocessing def ResPartido(node): ft=node.find_element

问题 Following the suggestion here, my package (or the directory containing my modules) is located at C:/Python34/Lib/site-packages. The directory contains an __init__.py and sys.path contains a path to the directory as shown. Still I am getting the following error: Traceback (most recent call last): File "C:/Python34/Lib/site-packages/toolkit/window.py", line 6, in <module> from catalogmaker import Catalog File "C:\Python34\Lib\site-packages\toolkit\catalogmaker.py", line 1, in <module> from

问题 I would like to create a class that describes a file resource and then pickle it. This part is straightforward. To be concrete, let's say that I have a class "A" that has methods to operate on a file. I can pickle this object if it does not contain a file handle. I want to be able to create a file handle in order to access the resource described by "A". If I have an "open()" method in class "A" that opens and stores the file handle for later use, then "A" is no longer pickleable. (I add here

问题 I am training a face recognition model using Fisher Face algorithm using OpenCV library and Python language. fisherFace = cv2.face.FisherFaceRecognizer_create() fisherFace.train(imagefaceList, np.array(labelsIndexList)) I want to save this model in file/memory. In other word i want to save 'fisherface' object. I have tried pickle module for saving this object using this. I am not able to pickle and unpickle this object.Code is as below: class test(object): def __init__(self, a): self.a = a

问题 I use python 3.4 with win 7 64-bit system. I ran the following code: 6 """ load single batch of cifar """ 7 with open(filename, 'r') as f: ----> 8 datadict = pickle.load(f) 9 X = datadict['data'] The wrong message is UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 0: illegal multibyte sequence I changed the line 7 as: 6 """ load single batch of cifar """ 7 with open(filename, 'r'，encoding='utf-8') as f: ----> 8 datadict = pickle.load(f) 9 X = datadict['data'] The wrong

问题 For a while I've been using a package called "gnosis-utils" which provides an XML pickling service for Python. This class works reasonably well, however it seems to have been neglected by it's developer for the last four years. At the time we originally selected gnosis it was the only XML serization tool for Python. The advantage of Gnosis was that it provided a set of classes whose function was very similar to the built-in Python XML pickler. It produced XML which python-developers found

问题 I have a dictionary pickled on disk with size of ~780 Megs (on disk). However, when I load that dictionary into the memory, its size swells unexpectedly to around 6 gigabytes. Is there anyway to keep the size around the actual filesize in the memory as well, (I mean it will be alright if it takes around 1 gigs in the memory, but 6 gigs is kind of a strange behavior). Is there a problem with the pickle module, or should I save the dictionary in some other format? Here is how I am loading the

问题 (Keep in mind I'm working in Python 3, so a solution needs to work in Python 3.) I would like to use the copyreg module to teach Python how to pickle functions. When I tried to do it, the _Pickler object would still try to pickle functions using the save_global function. (Which doesn't work for unbound methods, and that's the motivation for doing this.) It seems like _Pickler first tries to look in its own dispatch for the type of the object that you want to pickle before looking in copyreg

问题 I have a dictionary like class that I use to store some values as attributes. I recently added some logic( __getattr__ ) to return None if an attribute doesn't exist. As soon as I did this pickle crashed, and I wanted some insight into why? Test Code: import cPickle class DictionaryLike(object): def __init__(self, **kwargs): self.__dict__.update(kwargs) def __iter__(self): return iter(self.__dict__) def __getitem__(self, key): if(self.__dict__.has_key(key)): return self.__dict__[key] else:

问题 I'm implementing this notebook on Windows with Python 3.5.3 and got the follow error on load_vectors() call. I've tried different solutions posted but none worked. <ipython-input-86-dd4c123b0494> in load_vectors(loc) 1 def load_vectors(loc): 2 return (load_array(loc+'.dat'), ----> 3 pickle.load(open(loc+'_words.pkl','rb')), 4 pickle.load(open(loc+'_idx.pkl','rb'))) UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 0: ordinal not in range(128) 回答1: You should probably give