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Prologue
Sorted by alphabetical order of the name of the packages
matlab
ValueError: initializer must be a rectangular nested sequence
Traceback (most recent call last):
File "D:/Git/DnCNN-GCT/dncnn_pytorch/preprocess.py", line 99, in <module>
curvelet = Curvelet(img)
File "D:/Git/DnCNN-GCT/dncnn_pytorch/preprocess.py", line 27, in __init__
self.is_real = matlab.double(np.array(is_real).tolist())
File "D:\Program Files\Python38\Lib\site-packages\matlab\mlarray.py", line 51, in __init__
raise ex
File "D:\Program Files\Python38\Lib\site-packages\matlab\mlarray.py", line 49, in __init__
super(double, self).__init__('d', initializer, size, is_complex)
File "D:\Program Files\Python38\Lib\site-packages\matlab\_internal\mlarray_sequence.py", line 41, in __init__
init_dims = _get_size(initializer)
File "D:\Program Files\Python38\Lib\site-packages\matlab\_internal\mlarray_utils.py", line 76, in _get_size
raise ValueError("initializer must be a rectangular nested sequence")
ValueError: initializer must be a rectangular nested sequence
Solution
The problem occurred when transfer data from python to MATLAB via the interface provided by MathWork.
It seemed that the only datatype that matlab.double accept is list, so we have to change the datatype from whatever you provided to list. However, if you use Numpy in python, the function np.array.tolist() change the datatype to list only if the shape of the original ndarray is not (1, ), so you have to write [x.tolist()] on purpose in this case.
Updated at 31 Mar, 2022
requests
ValueError: check_hostname requires server_hostname
Traceback (most recent call last):
File "D:/Python_Proj/anti-touch-fish/main.py", line 21, in <module>
main()
File "D:/Python_Proj/anti-touch-fish/main.py", line 17, in main
r = requests.get(news_url, proxies=proxy)
File "C:\Users\lzhao\AppData\Roaming\Python\Python38\site-packages\requests\api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "C:\Users\lzhao\AppData\Roaming\Python\Python38\site-packages\requests\api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "C:\Users\lzhao\AppData\Roaming\Python\Python38\site-packages\requests\sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "C:\Users\lzhao\AppData\Roaming\Python\Python38\site-packages\requests\sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "C:\Users\lzhao\AppData\Roaming\Python\Python38\site-packages\requests\adapters.py", line 439, in send
resp = conn.urlopen(
File "D:\Program Files\Python38\lib\site-packages\urllib3\connectionpool.py", line 696, in urlopen
self._prepare_proxy(conn)
File "D:\Program Files\Python38\lib\site-packages\urllib3\connectionpool.py", line 964, in _prepare_proxy
conn.connect()
File "D:\Program Files\Python38\lib\site-packages\urllib3\connection.py", line 359, in connect
conn = self._connect_tls_proxy(hostname, conn)
File "D:\Program Files\Python38\lib\site-packages\urllib3\connection.py", line 500, in _connect_tls_proxy
return ssl_wrap_socket(
File "D:\Program Files\Python38\lib\site-packages\urllib3\util\ssl_.py", line 453, in ssl_wrap_socket
ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
File "D:\Program Files\Python38\lib\site-packages\urllib3\util\ssl_.py", line 495, in _ssl_wrap_socket_impl
return ssl_context.wrap_socket(sock)
File "D:\Program Files\Python38\lib\ssl.py", line 500, in wrap_socket
return self.sslsocket_class._create(
File "D:\Program Files\Python38\lib\ssl.py", line 997, in _create
raise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname
Solution
The problem is related to proxy. Because new version of urllib3 has modified the scheme of proxy it returned from the old scheme:
proxy = urllib.request.getproxies()
# proxy = {
# 'http' : 'http_proxy_ip:port',
# 'https' : 'https_proxy_ip:port'
#}
to the new one:
proxy = urllib.request.getproxies()
# proxy = {
# 'http' : 'http://http_proxy_ip:port',
# 'https' : 'https://https_proxy_ip:port'
#}
So, modify the scheme to the previous one should work well.
Updated at 21 Mar, 2022
