pillow

PIL: ValueError: unknown resampling filter, How to resize images uploaded on Flask?

由 核能气质少年 提交于 2020-06-24 21:35:09
问题 I'm making a web app using Flask, and I want to resize the images that are uploaded. I'm using PIL to do this, but an error is thrown. The process to do it is like this, but it seems inefficient: filename = secure_filename(form.image.data.filename) form.image.data.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) img = Image.open(os.path.join(app.config['UPLOAD_FOLDER'],filename), 'r') img = img.resize(300, 300) img.save(filename, quality=100, optimize=True) What I'm trying to do is

PIL: ValueError: unknown resampling filter, How to resize images uploaded on Flask?

由 佐手、 提交于 2020-06-24 21:30:06
问题 I'm making a web app using Flask, and I want to resize the images that are uploaded. I'm using PIL to do this, but an error is thrown. The process to do it is like this, but it seems inefficient: filename = secure_filename(form.image.data.filename) form.image.data.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) img = Image.open(os.path.join(app.config['UPLOAD_FOLDER'],filename), 'r') img = img.resize(300, 300) img.save(filename, quality=100, optimize=True) What I'm trying to do is

Python PIL image Verify returns None

由 谁说胖子不能爱 提交于 2020-05-26 02:45:35
问题 I am developing a tool which retrieves a JPG from an API and processes it. The source of the image cannot be trusted and I want to test if the image is a valid JPG (which is the only image type allowed). I encountered an error with PIL that I am unable to fix. Below is my code: image = StringIO(base64.b64decode(download['file'])) img = Image.open(image) if img.verify(): print 'Valid image' else: print 'Invalid image' However, it seems that img.verify() returns None. I can call other functions

Python PIL image Verify returns None

由 扶醉桌前 提交于 2020-05-26 02:45:34
问题 I am developing a tool which retrieves a JPG from an API and processes it. The source of the image cannot be trusted and I want to test if the image is a valid JPG (which is the only image type allowed). I encountered an error with PIL that I am unable to fix. Below is my code: image = StringIO(base64.b64decode(download['file'])) img = Image.open(image) if img.verify(): print 'Valid image' else: print 'Invalid image' However, it seems that img.verify() returns None. I can call other functions

Python PIL image Verify returns None

由 谁说胖子不能爱 提交于 2020-05-26 02:43:12
问题 I am developing a tool which retrieves a JPG from an API and processes it. The source of the image cannot be trusted and I want to test if the image is a valid JPG (which is the only image type allowed). I encountered an error with PIL that I am unable to fix. Below is my code: image = StringIO(base64.b64decode(download['file'])) img = Image.open(image) if img.verify(): print 'Valid image' else: print 'Invalid image' However, it seems that img.verify() returns None. I can call other functions

Django 后台管理xadmin

由 眉间皱痕 提交于 2020-05-08 04:15:08
一. xadmin的使用 　　后台管理在开发中可以给我们提供很大的便利，django自带了一个后台管理admin，不过还有一个xadmin比django自带的好用一些，功能更加强大，为模型提供了版本控制，可以回滚数据。django中权限主要靠六表实现，首先是基础的user、group、permission三表，然后分别是user与group的多对多关系表、group与permission的多对多关系表，最后django特有的user与permission的多对多关系表。django基于用户user、组group、权限permission三张表的关系，一共六张表来实现权限管理。 　　xadmin里面提供了权限的管理，而且使用很简单。 1.1 xadmin的使用流程 　　 1. 安装xadmin 　　 因为xadmin是基于Pillow模块的，所以需要先安装Pillow模块： # 安装Pillow模块 pip install Pillow # 安装xadmin第一种方式 pip install https://codeload.github.com/sshwsfc/xadmin/zip/ django2 # 安装xadmin第二种方式 pip install xadmin 　　 1.2 在配置的APP中注册xadmin INSTALLED_APPS = [ # ... #

Django Error: Cannot use ImageField because Pillow is not installed

由 ＊爱你＆永不变心＊ 提交于 2020-04-30 10:39:01
问题 I'm currently learning how to use Django to develop a web service. As I go through an online course on Udemy, I ran into a problem using ImageField in models.py. My problem is that, when I excute the runserver command, Django shows the following error although I am pretty sure the library Pillow is installed. In models.py, I have the following code: from django.db import models from django.contrib.auth.models import User class UserProfileInfo(models.Model): user = models.OneToOneField(User,

Django Error: Cannot use ImageField because Pillow is not installed

由 会有一股神秘感。 提交于 2020-04-30 10:37:30
问题 I'm currently learning how to use Django to develop a web service. As I go through an online course on Udemy, I ran into a problem using ImageField in models.py. My problem is that, when I excute the runserver command, Django shows the following error although I am pretty sure the library Pillow is installed. In models.py, I have the following code: from django.db import models from django.contrib.auth.models import User class UserProfileInfo(models.Model): user = models.OneToOneField(User,

使用wxpy这个基于python实现的微信工具库的一些常见问题

由 与世无争的帅哥 提交于 2020-04-30 02:06:35
使用如下的命令行安装： pip install wxpy Collecting wxpy Downloading https://files.pythonhosted.org/packages/6b/ac/8f c4561551489f36/wxpy-0.3.9.8.tar.gz (45kB) 100% | 51kB 98kB/s Collecting itchat==1.2.32 (from wxpy) Downloading https://files.pythonhosted.org/packages/61/6d/49 3fec62ed7bb343/itchat-1.2.32-py2.py3-none-any.whl Requirement already satisfied: requests in c:\myapp\py20180816 Requirement already satisfied: future in c:\myapp\py20180816\l om wxpy) (0.16.0) Collecting pyqrcode (from itchat==1.2.32->wxpy) Downloading https://files.pythonhosted.org/packages/37/61/f0 884ac68d979316/PyQRCode-1.2.1

python基础教程:包的创建及导入

由 ￣綄美尐妖づ 提交于 2020-04-30 00:12:53
包是一种通过用“带点号的模块名”来构造 Python 模块 命名空间的方法。 例如，模块名 A.B 表示 A 包中名为 B 的子模块。正如模块的使用使得不同模块的作者不必担心彼此的全局变量名称一样，使用加点的模块名可以使得 NumPy 或 Pillow 等多模块软件包的作者不必担心彼此的模块名称一样。 假设你想为声音文件和声音数据的统一处理，设计一个模块集合（一个“包”）。由于存在很多不同的声音文件格式（通常由它们的扩展名来识别，例如：.wav， .aiff， .au），因此为了不同文件格式间的转换，你可能需要创建和维护一个不断增长的模块集合。 你可能还想对声音数据还做很多不同的处理（例如，混声，添加回声，使用均衡器功能，创造人工立体声效果）， 因此为了实现这些处理，你将另外写一个无穷尽的模块流。这是你的包的可能结构（以分层文件系统的形式表示）： __init__ .py Initialize the sound package formats / Subpackage for file format conversions __init__ .py wavread.py wavwrite.py aiffread.py aiffwrite.py auread.py auwrite.py ... effects / Subpackage for sound effects _
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