python - Using Argparse for Dictionary -


i want read 1 of items list of videos. video reading , display code following. code working fine.

import cv2   def videoreading(vid):      cap = cv2.videocapture(vid)     while true:         ret, frame = cap.read()         cv2.imshow('video', frame)         if cv2.waitkey(1) & 0xff == ord('q'):             break     cap.release()     cv2.destroyallwindows()

since i've large number of videos , i'm calling code through command line, writing entire video name cumbersome. created dictionary. here given example of 2:

{"video1.mp4": 1, 'video2.mp4': 2}

now i'm using following code call video using value 1 or 2, rather video name. code following:

def main():      videofiles= ["video1.mp4", "video2.mp4"]     videofilesindicator = [1, 2]      model_list = {}     in range(len(videofiles)):         model_list[videofiles[i]] = videofilesindicator[i]      print(model_list)     def convertvalues(value):         return model_list.get(value, value)      parser = argparse.argumentparser()     group = parser.add_mutually_exclusive_group()       group.add_argument("-v", "--video", = "add video file name of format", type = convertvalues,\                      choices = [1,2], default = 1)      args =parser.parse_args()      return videoreading(args.video)    if __name__ == "__main__":      main()

now when i'm running code in cmd "python videoreading.py -v 2", it's throwing me following error.

error: argument -v/--video: invalid choice: '2' (choose 1, 2)

i'm not understanding why i'm getting error. i'm following this post build program.

your dictionary backwards; want map number file name, when enter number, file name can returned. there's no need provide default value convertvalues, because using choices limit allowable inputs valid keys of dict.

def main():      video_files = ["video1.mp4", "video2.mp4"]      model_list = dict(enumerate(video_files, start=1))      print(model_list)       parser = argparse.argumentparser()     group = parser.add_mutually_exclusive_group()      group.add_argument("-v", "--video",                         help="add video file name of format",                        type=lambda str: model_list[int(str)],                        choices=model_list.values())      args = parser.parse_args()      return videoreading(args.video)

Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more