Questions tagged [pickle]

Pickle, a handy object serialization tool specifically designed for Python programming. When you combine this tag with the Python label, it can help address any inquiries regarding storing or retrieving objects using Pickle.

Minimize the memory footprint of this Pandas script when loading a JSON file and saving it as a pickle

I'm having trouble trying to further optimize memory usage for my program. Essentially, I am parsing JSON log files into a pandas dataframe but encountering the following challenges: The append function is causing substantial memory consumption as it cre ...

Upon the completion of the unpickling process, the system experiences a significant increase in

I have a defaultdict object with the following structure: { string : [(string, (float, float)), (string, (float, float)), ....]} The size of it is approximately 12.5 MB When pickling using the code below: with open(Path_to_file, 'wb') as file: pickl ...

Cloudpickle changes with each program execution

Consider this Python code snippet: import cloudpickle class Foo: def __init__(self, num): self.num = num def outer(num): return Foo(num) print(cloudpickle.dumps(outer)) Upon running the code, a different pickle file is generated each ...

Risks associated with storing configuration files in JSON/CPickle are related to security

In search of a secure and flexible solution for storing credentials in a config file for database connections and other private information within a Python module. This module is responsible for logging user activity in the system through different handler ...

When pickle dumps result in producing nonsensical output

Hey there! I've run into a strange issue with my JSON Encoder. When using pickle.dumps(), the output is appearing as: "cdecimal Decimal p0 (S'2097369' p1 tp2 Rp3 .", Instead, it should display: 2097369 This is the code snippet causing the problem: clas ...

Is it possible to save and utilize cookies in a program without relying on the selenium driver.add_cookie

In the midst of a project, I find myself faced with the task of extracting URLs for all products on a given page and utilizing Scrapy to sift through each URL for product data. The challenge arises when a pop-up emerges 3-5 seconds after loading every URL, ...

Automating the process of updating cookies with Selenium and Python

I've been experimenting with checking the freshness of my cookies. Specifically, I'm conducting tests on Facebook.com. It's a hassle to have to log in every time I want to test something, so I'm keen on avoiding that if possible. Howev ...

Is Theano 0.7 missing Theano's pkl_utils Dump Function?

I am in need of saving a trained model that I have been working on. The model utilizes shared variables such as Weights and biases, which makes it necessary for the saved file to be readable on machines without Theano installed. My initial plan was to use ...

Skipping objects during unpickling in Python can be achieved by defining a custom unpick

I want to efficiently access specific objects in a file where multiple large objects are stored using the pickle module. I don't want to load all the objects before the one I need. Let's say I have a file with only numbers as an example. import p ...

The Python pickling error I encountered was a TypeError stating that the pickled object did not return

There is a well-known issue with Python pickling as discussed in this Stack Overflow thread. However, the solution provided there may be difficult to understand. The following code snippet showcases the problem in Python 3.6: import pickle from astroquer ...

What contributes to the superior performance of pickle + gzip compared to h5py when working with repetitive datasets?

I have encountered an issue while saving a numpy array that contains repetitive data: import numpy as np import gzip import cPickle as pkl import h5py a = np.random.randn(100000, 10) b = np.hstack( [a[cnt:a.shape[0]-10+cnt+1] for cnt in range(10)] ) f_p ...

alike sequence from preserved selection

I'm currently exploring a method to validate if a user's input closely matches any existing string contained in a pickle file. Let's say we have a scenario where a user enters their name... userInput = input("Please enter your name: ") .. ...

As the cPickle is utilized in conjunction with the incremental classifier of sklearn, there are fluctuations in

I have been implementing the PassiveAggressiveRegressor incremental classifier in my project. After every use of the partial_fit function, I make sure to save the model into a pickle file. from sklearn import linear_model import numpy as np import time X ...

Efficient method for reading intricate data structures from disk in Python

My CSV dataset contains strings in a single field that represent lists of values. The sequences vary greatly in length, ranging from one observation to thousands. I am currently parsing these strings into nested lists within a Pandas DataFrame. Although th ...

Tips for retaining deque data in Python

I am currently working on a Python project and have encountered the following line of code: user_last3[name].append(score) I am interested in saving this data to a database (using Python 3.x) so that I can manipulate previously saved data, add scores to ...