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Store large dictionary to file in Python

由 怎甘沉沦 提交于 2020-12-30 07:44:43
问题 I have a dictionary with many entries and a huge vector as values. These vectors can be 60.000 dimensions large and I have about 60.000 entries in the dictionary. To save time, I want to store this after computation. However, using a pickle led to a huge file. I have tried storing to JSON, but the file remains extremely large (like 10.5 MB on a sample of 50 entries with less dimensions). I have also read about sparse matrices. As most entries will be 0, this is a possibility. Will this reduce

Can you save an array of images in core data?

由 为君一笑 提交于 2020-12-30 03:48:13
问题 I know you can save one by using the binary data property of an entity but is it possible to save multiple? you can save one by using this: UIImageJPEGRepresentation(image: UIImage) you can save it and then transform it into an image again with UIImage(data: ____) but can I transform an array full of images into binary data? If you can't with core data, any other ways I can do it? BTW, the image array is full of user taken image saved on the device.. Thanks for all the helpers! 回答1: convert

Can you save an array of images in core data?

由 亡梦爱人 提交于 2020-12-30 03:47:06
问题 I know you can save one by using the binary data property of an entity but is it possible to save multiple? you can save one by using this: UIImageJPEGRepresentation(image: UIImage) you can save it and then transform it into an image again with UIImage(data: ____) but can I transform an array full of images into binary data? If you can't with core data, any other ways I can do it? BTW, the image array is full of user taken image saved on the device.. Thanks for all the helpers! 回答1: convert

Can you save an array of images in core data?

由 无人久伴 提交于 2020-12-30 03:46:45
问题 I know you can save one by using the binary data property of an entity but is it possible to save multiple? you can save one by using this: UIImageJPEGRepresentation(image: UIImage) you can save it and then transform it into an image again with UIImage(data: ____) but can I transform an array full of images into binary data? If you can't with core data, any other ways I can do it? BTW, the image array is full of user taken image saved on the device.. Thanks for all the helpers! 回答1: convert

Storing application permissions in a database

由 心已入冬 提交于 2020-07-31 06:35:25
问题 I'm developing an application for our company that eventually will have lots of ways of restricting users to particular sections/modules. While the application is still small, I'd like to move to a new method of storing permissions that, as the application grows, will remain easy to maintain and query. Currently in our MySQL database we have a table called "user" which stores the user's ID, username and password. In a separate table called "user_acl" is the following: user_acl_id acl_root acl

React dom not updating with Redux store

由 老子叫甜甜 提交于 2020-04-18 05:36:43
问题 I'm new to react-redux and I'm having an issue with a web-app I'm developing. The app should have a user log-in functionality, it should be able to fetch and display a list of games from a database api I made, and it should be able to display information for a specific game from that list when it's clicked. I have the user log-in functionality working perfectly, but the game list and specific game details don't initially display in the browser. If I look in the redux devtools, the action is

React dom not updating with Redux store

由 会有一股神秘感。 提交于 2020-04-18 05:36:39
问题 I'm new to react-redux and I'm having an issue with a web-app I'm developing. The app should have a user log-in functionality, it should be able to fetch and display a list of games from a database api I made, and it should be able to display information for a specific game from that list when it's clicked. I have the user log-in functionality working perfectly, but the game list and specific game details don't initially display in the browser. If I look in the redux devtools, the action is

本人开发的第一款ios：比特币实时行情+挖矿收益计算器

由 耗尽温柔 提交于 2020-04-07 07:16:02
亲爱的水果机用户， 本人开发的一款ios软件已登录AppStore，参考了bitcoinity.org/clarkmoody/btc123的重要功能，具备声音提醒，包含ticker、depth、trades及charts数据,同时带有挖矿收益估算器，实在是居家旅行发财必备利器 切克闹地址: https://itunes.apple.com/us/app/bitcoin-data/id676937121?ls=1&mt=8 为方便你的测试，请使用以下兑换码进行免费下载，谢谢支持~ PRMN9XT9HYT6 YEWM9PR9AJP9 6L7MHAXKHHJ4 9JAP9A9XMYWA J4RJMX644LNF ---- ---------------------------------------------------------------- 说来惭愧，自大半年前啃了100来页的objective c教程后，便心思不在，读书笔记也太监了。。后来接触了比特币的应用，觉得可以做一个，于是边学边做完成了这个app，前后也就一个月，上班之余每天花几小时来做。事实证明，掌握一门语言的捷径就是动手。当然，这个月下来还只是对ios开发的初认识，距离精通还很遥远，但正如俺尊敬的老大一贯所说，所有东西都是融会贯通的，所以学一门语言并不是做一个项目的最大障碍，而是经验和处理手法

Python: Use mouse to draw a rectangle around objects in any window? Also store start and end coordinates as variables relative to said window?

由 主宰稳场 提交于 2020-03-22 09:49:52
问题 I'm very new to Python and need an approach for accomplishing an important function I've done before in macro-scripting languages: I have a Python program that will be processing a screengrab image using pyscreenshot. In order to feed pyscreenshot the necessary x1, y1, x2, y2 coordinates to create the image, I need the user to define the portion of the screen by drawing a rectangle around it. Think "snipping" tool in Windows and cmd+shift+4 in OSX. I am open to using any BSD module necessary
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