How can I overcome this key word error?
enter code here # -*- coding: utf-8 -*- import math import matplotlib matplotlib.use("Agg") import matplotlib.pyplot as plt import matplotlib.animation as animation fig1=plt.figure() ax=plt.axes(xlim=(-10,10), ylim=(-10,10)) line,=ax.plot(,,lw=1) """def init (): line.set_data(,) return line,""" dt=0.001 X= Y= r=float(input("Enter the radius :: ")) w=float(input("Enter angular frequency :: ")) def run(data): t=0 while w*t<=2*math.pi: x=r*math.cos(w*t) y=r*math.sin(w*t) X.append(x) Y.append(y) t=t+dt line.set_data(X,Y) return line, line,=ax.plot(X,Y,lw=2) FFMpegWriter = animation.writers['ffmpeg'] writer = FFMpegWriter(fps=15, metadata=dict(artist='Me'), bitrate=1800) anim=animation.FuncAnimation(fig1,run,frames=200,interval=20,blit=True) anim.save('amim.mp4',writer=writer)
The error message shown is ::
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/tathagata/anaconda3/lib/python3.4/site- packages/spyderlib/widgets/externalshell/sitecustomize.py", line 685, in runfile execfile(filename, namespace) File "/home/tathagata/anaconda3/lib/python3.4/site- packages/spyderlib/widgets/externalshell/sitecustomize.py", line 85, in execfile exec(compile(open(filename, 'rb').read(), filename, 'exec'), namespace) File "/home/tathagata/Documents/Python scripts/circleamim.py", line 35, in <module> FFMpegWriter = animation.writers['ffmpeg'] File "/home/tathagata/anaconda3/lib/python3.4/site-packages/matplotlib/animation.py", line 81, in __getitem__ return self.avail[name] KeyError: 'ffmpeg'
I use anacoda distribution and SPYDER as my IDE. I have seen the many solutions related to key errors. But the movie wont run. How can I make the movie to run? I hope there are no other logical errors.
ffmpeg and add path to
# on windows plt.rcParams['animation.ffmpeg_path'] = 'C:\\ffmpeg\\bin\\ffmpeg.exe' # on linux plt.rcParams['animation.ffmpeg_path'] = u'/home/username/anaconda/envs/env_name/bin/ffmpeg'
Note for linux users: The path for
ffmpeg can be found by simply using
Also instead of
FFMpegWriter = animation.writers['ffmpeg'] writer = FFMpegWriter(fps=15, metadata=dict(artist='Me'), bitrate=1800)
I just used
writer = animation.FFMpegWriter()
How can I overcome this key word error?, First install ffmpeg and add path to ffmpeg # on windows plt.rcParams['animation.ffmpeg_path'] = 'C:\\ffmpeg\\bin\\ffmpeg.exe' # on linux plt. You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number. Site Feedback
It seems that
ffmpegis not installed on your system. Try the following code:
import matplotlib.animation as animation print(animation.writers.list())
It will print out a list of all available MovieWriters. If
ffmpegis not among it, you need to install it first from the ffmpeg homepage.
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If you have Homebrew, literally just run the command
brew install ffmpeg
And Homebrew will take care of the rest (dependencies, etc). If you don't, I would recommend getting Homebrew or something like it (apt-get on Linux is built in, or an alternative on OS X would be Macports)
CodeNotes for C#, As a result, the aforementioned error is generated. The Base Keyword One way to overcome this problem is to simply give the Fruitclass a default noargument First, let's distinguish between the types of errors: most compilers will give three types of compile-time alerts: compiler warnings, compiler errors, and linker errors. Although you don't want to ignore them, compiler warnings aren't something severe enough to actually keep your program from compiling.
I have also posed with same problem(keyError: 'ffmpeg') but instead of using anakonda, I used IDLE3. So, first i checked for 'ffmpeg' in terminal it wasn't installed so installed it.
sudo apt install ffmpeg
and when I run my
save_animation program, it worked generating animation files in '.mpeg' format.
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