问题描述
在code我用（不介意的形象，这是一个测试一个）：
The code I used (don't mind the image, it's a test one):
import urllib
urllib.urlretrieve('https%3A//dl.dropboxusercontent.com/u/95587456/Evenimente/1.jpg','/storage/emulated/0/Temp/1.jpg')
我试图通过其公共Dropbox的链接，下载一个图像，只为这个错误弹出：
I tried to download an image by its public dropbox link, only for this error to pop up:
I/python ( 3750): Traceback (most recent call last):
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/app/main.py", line 102, in <module>
"/home/cristi/Desktop/AplicatieMinister/.buildozer/android/app/main.py", line 63, in IncarcaAfise
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/urllib.py", line 91, in urlretrieve
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/urllib.py", line 237, in retrieve
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/urllib.py", line 205, in open
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/urllib.py", line 461, in open_file
I/python ( 3750): File "/home/cristi/Desktop/AplicatieMinister/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/urllib.py", line 475, in open_local_file
I/python ( 3750): IOError: [Errno 2] No such file or directory: 'https://dl.dropboxusercontent.com/u/95587456/Evenimente/1.jpg'
在Windows上运行该code没有问题（它下载），但在Android（编译它作为一个APK由buildozer后），它给人的previous错误。
Running this code on Windows has no issues (it downloads the ), but on android (after compiling it as an APK by buildozer) it gives the previous error.
我尝试添加？（DL）= 1和β（DL）= 0在链路的末端，它在相同的错误结束。另外，我试过urllib.quote链接（和更换'$ 3A'与'：'）。并且它还是给了这个错误。
I tried adding ?dl=1 and ?dl=0 at the end of the link, and it ended up in the same error. Also, I tried urllib.quote on the link (and replacing the '$3A' with ':') and it still gave this error.
有什么我都忽略了关于如何在Android的urllib而urlretrieve工作？
Is there anything I have overlooked regarding how urllib and urlretrieve work under android?
另外，如果有帮助，Kivy / buildozer是在这个开发中使用。
Also, if it helps, Kivy/buildozer were used in the development of this.
推荐答案
根据堆栈跟踪，似乎 urllib.urlretrieve 认为你的Dropbox URL是本地文件路径，而不是一个因特网网址，并试图将其打开本身。 （也就是说，它会尝试使用 open_local_file ）。这应该是基于URL的格式自动确定，但这显然是你的企图逃脱糊涂 ：，这应该是不必要的
Based on the stack trace, it appears that urllib.urlretrieve thinks your Dropbox URL is a local file path, as opposed to an Internet URL, and is attempting to open it as such. (I.e., it tries to use open_local_file.) That is supposed to be automatically determined based on the format of the URL, but this is apparently confused by your attempt to escape the ":", which should be unnecessary.
您样品code其实失败对我来说也是这样，只是在Python间preTER：
Your sample code actually fails the same way for me, just in the Python interpreter:
In [1]: import urllib
In [2]: urllib.urlretrieve('https%3A//dl.dropboxusercontent.com/u/95587456/Evenimente/1.jpg','./1.jpg')
...
IOError: [Errno 2] No such file or directory: 'https://dl.dropboxusercontent.com/u/95587456/Evenimente/1.jpg'
既然如此，你确定你跑你认为你所说的是你在不同的平台？在code
That being the case, are you sure you've run the code you thought were you on the different platforms as you mentioned?
刚刚杀青的URL恢复正常工作对我来说：
Just fixing the URL back to normal works for me:
In [1]: import urllib
In [2]: urllib.urlretrieve('https://dl.dropboxusercontent.com/u/95587456/Evenimente/1.jpg','./1.jpg')
Out[2]: ('./1.jpg', <httplib.HTTPMessage instance at 0x10da6d878>)
（我还修改了第二个参数，使之在我的电脑上工作，但这是不相关的。）
(I also modified the second parameter to make it work on my computer, but that's unrelated.)
这篇关于Python 2.7版下载错误由urllib.urlretrieve Dropbox的文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！