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Python3. I get an error when I deepcopy the instance of the class that has cv2.VideoCapture in __init__ method

Getting the class name of an instance?python decorator for class methodsFlask-PyMongo - Object of type InsertOneResult is not JSON serializableDifferent exceptions happened when running Keras and scikit-learnPipenv not working after upgrade to python (Homebrew installed)Django - No such table: main.auth_user__oldmatplotlib ImportError: numpy.core.multiarray failed to import on raspberry pi 3importing python opencv library into sikuliXWhen I execute 'import keras', I get the following error:getting error while using Flask JWT, AttributeError: 'list' object has no attribute 'id' and shows 500 Internal server error

1

Here is my code.

import cv2
import numpy as np
from copy import deepcopy

class Video:

def __init__(self, path):

 self.name = path.split('/')[-1]
 self.cap = cv2.VideoCapture(path)

When I create an instance of Video class and try to deep copy it I get this error.

video = Video('video.mp4')
print(video)
print(deepcopy(video))

ERROR:

<main.Video object at 0x103496630>
Traceback (most recent call last):
File "test.py", line 28, in
print(deepcopy(video))
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 180, in deepcopy
y = _reconstruct(x, memo, *rv)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 280, in _reconstruct
state = deepcopy(state, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 150, in deepcopy
y = copier(x, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 240, in _deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 169, in deepcopy
rv = reductor(4)
TypeError: can't pickle cv2.VideoCapture objects

But when I remove 'cv2.VideoCapture(path)', everything works fine.

import cv2
import numpy as np
from copy import deepcopy

class Video:

 def __init__(self, path):

 self.name = path.split('/')[-1]

Output:

<main.Video object at 0x10d0f7c18>
<main.Video object at 0x119693eb8>

python python-3.x class opencv

share|improve this question

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

add a comment | 

1

Here is my code.

import cv2
import numpy as np
from copy import deepcopy

class Video:

def __init__(self, path):

 self.name = path.split('/')[-1]
 self.cap = cv2.VideoCapture(path)

When I create an instance of Video class and try to deep copy it I get this error.

video = Video('video.mp4')
print(video)
print(deepcopy(video))

ERROR:

<main.Video object at 0x103496630>
Traceback (most recent call last):
File "test.py", line 28, in
print(deepcopy(video))
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 180, in deepcopy
y = _reconstruct(x, memo, *rv)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 280, in _reconstruct
state = deepcopy(state, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 150, in deepcopy
y = copier(x, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 240, in _deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 169, in deepcopy
rv = reductor(4)
TypeError: can't pickle cv2.VideoCapture objects

But when I remove 'cv2.VideoCapture(path)', everything works fine.

import cv2
import numpy as np
from copy import deepcopy

class Video:

 def __init__(self, path):

 self.name = path.split('/')[-1]

Output:

<main.Video object at 0x10d0f7c18>
<main.Video object at 0x119693eb8>

python python-3.x class opencv

share|improve this question

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

add a comment | 

Here is my code.

import cv2
import numpy as np
from copy import deepcopy

class Video:

def __init__(self, path):

 self.name = path.split('/')[-1]
 self.cap = cv2.VideoCapture(path)

When I create an instance of Video class and try to deep copy it I get this error.

video = Video('video.mp4')
print(video)
print(deepcopy(video))

ERROR:

<main.Video object at 0x103496630>
Traceback (most recent call last):
File "test.py", line 28, in
print(deepcopy(video))
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 180, in deepcopy
y = _reconstruct(x, memo, *rv)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 280, in _reconstruct
state = deepcopy(state, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 150, in deepcopy
y = copier(x, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 240, in _deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/Users/tigranfahradyan/.local/share/virtualenvs/pyvideoproc-x3IHrdzn/lib/python3.7/copy.py", line 169, in deepcopy
rv = reductor(4)
TypeError: can't pickle cv2.VideoCapture objects

But when I remove 'cv2.VideoCapture(path)', everything works fine.

import cv2
import numpy as np
from copy import deepcopy

class Video:

 def __init__(self, path):

 self.name = path.split('/')[-1]

Output:

<main.Video object at 0x10d0f7c18>
<main.Video object at 0x119693eb8>

python python-3.x class opencv

share|improve this question

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

import cv2
import numpy as np
from copy import deepcopy

class Video:

def __init__(self, path):

 self.name = path.split('/')[-1]
 self.cap = cv2.VideoCapture(path)

video = Video('video.mp4')
print(video)
print(deepcopy(video))

import cv2
import numpy as np
from copy import deepcopy

class Video:

 def __init__(self, path):

 self.name = path.split('/')[-1]

share|improve this question

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

share|improve this question

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

asked 17 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

1 Answer
1

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0

I kind of figured out how to solve this, but I am sure this is not the best way. For some reasons it gives an error when you try to deepcopy the instance of the class that has a field set to 'cv2.VideoCapture(path_to_video)'.

But you can have local variable like this.

import cv2

class Test:

 def __init__(self):
 cap = cv2.VideoCapture(path_to_video)

 """This will probably give an error for you 
 if you try to deepcopy the instance of this class"""
 # self.cap = cv2.VideoCapture(path_to_video)

share|improve this answer

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

add a comment | 

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0

I kind of figured out how to solve this, but I am sure this is not the best way. For some reasons it gives an error when you try to deepcopy the instance of the class that has a field set to 'cv2.VideoCapture(path_to_video)'.

But you can have local variable like this.

import cv2

class Test:

 def __init__(self):
 cap = cv2.VideoCapture(path_to_video)

 """This will probably give an error for you 
 if you try to deepcopy the instance of this class"""
 # self.cap = cv2.VideoCapture(path_to_video)

share|improve this answer

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

add a comment | 

0

I kind of figured out how to solve this, but I am sure this is not the best way. For some reasons it gives an error when you try to deepcopy the instance of the class that has a field set to 'cv2.VideoCapture(path_to_video)'.

But you can have local variable like this.

import cv2

class Test:

 def __init__(self):
 cap = cv2.VideoCapture(path_to_video)

 """This will probably give an error for you 
 if you try to deepcopy the instance of this class"""
 # self.cap = cv2.VideoCapture(path_to_video)

share|improve this answer

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

add a comment | 

I kind of figured out how to solve this, but I am sure this is not the best way. For some reasons it gives an error when you try to deepcopy the instance of the class that has a field set to 'cv2.VideoCapture(path_to_video)'.

But you can have local variable like this.

import cv2

class Test:

 def __init__(self):
 cap = cv2.VideoCapture(path_to_video)

 """This will probably give an error for you 
 if you try to deepcopy the instance of this class"""
 # self.cap = cv2.VideoCapture(path_to_video)

share|improve this answer

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

import cv2

class Test:

 def __init__(self):
 cap = cv2.VideoCapture(path_to_video)

 """This will probably give an error for you 
 if you try to deepcopy the instance of this class"""
 # self.cap = cv2.VideoCapture(path_to_video)

share|improve this answer

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234

answered 13 hours ago

Տիգրան ՖահրադյանՏիգրան Ֆահրադյան

234