matplotlib savefig in jpeg format

Question

I am using matplotlib  within pylab  to display figures  And I want to save them in  jpg format  When I simply use the savefig command with jpg extension this returns    ValueError  Format  jpg  is not supported    Supported formats  emf  eps  pdf  png  ps  raw  rgba  svg  svgz   Is there a way to perform this

User · Answer

I just updated matplotlib to 1 1 0 on my system and it now allows me to save to jpg with savefig   To upgrade to matplotlib 1 1 0 with pip  use this command   pip install -U  http   sourceforge net projects matplotlib files matplotlib matplotlib-1 1 0 matplotlib-1 1 0 tar gz download    EDIT  to respond to comment    pylab is simply an aggregation of the matplotlib pyplot and numpy namespaces  as well as a few others  jinto a single namespace    On my system  pylab is just this   from matplotlib pylab import   import matplotlib pylab   doc     matplotlib pylab   doc     You can see that pylab is just another namespace in your matplotlib installation  Therefore  it doesn t matter whether or not you import it with pylab or with matplotlib pyplot   If you are still running into problem  then I m guessing the macosx backend doesn t support saving plots to jpg  You could try using a different backend  See here for more information

User · Answer

You can save an image as  png  and use the python imaging library  PIL  to convert this file to  jpg    import Image import matplotlib pyplot as plt  plt plot range 10   plt savefig  testplot png   Image open  testplot png   save  testplot jpg   JPEG     The original     The JPEG image

User · Answer

Just install pillow with pip install pillow and it will work

User · Answer

To clarify and update  neo useful answer and the original question  A clean solution consists of installing Pillow  which is an updated version of the Python Imaging Library  PIL   This is done using   pip install pillow   Once Pillow is installed  the standard Matplotlib commands  import matplotlib pyplot as plt  plt plot  1  2   plt savefig  image jpg     will save the figure into a JPEG file and will not generate a ValueError any more   Contrary to  amillerrhodes answer  as of Matplotlib 3 1  JPEG files are still not supported  If I remove the Pillow package I still receive a ValueError about an unsupported file type

User · Answer

Matplotlib can handle directly and transparently jpg if you have installed PIL  You don t need to call it  it will do it by itself  If Python cannot find PIL  it will raise an error

[matplotlib] matplotlib savefig in jpeg format

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