```ruby
class ParaviewLionPython27Nightly < Cask
  url 'http://www.paraview.org/paraview-downloads/download.php?submit=Download&version=nightly&type=binary&os=osx&downloadFile=ParaView-Darwin-64bit-Lion-Python27-NIGHTLY.dmg'
  homepage 'http://www.paraview.org/'
  version 'latest'
  sha256 :no_check
  link 'paraview.app'
  caveats <<-EOS.undent
    This version of ParaView is for OS X Lion (10.7) or Mountain Lion (10.8)
    and should be installed if the system Python version is 2.6. If your
    OS version is Lion (10.7) or later, and your system Python version is
    2.7 or later, you may install this cask or the paraview-nightly cask.
    EOS
end
```

Format Paraview Lion Python27 Nightly
user
```ruby
class ParaviewLionPython27Nightly < Cask
  version 'latest'
  sha256 :no_check

  url 'http://www.paraview.org/paraview-downloads/download.php?submit=Download&version=nightly&type=binary&os=osx&downloadFile=ParaView-Darwin-64bit-Lion-Python27-NIGHTLY.dmg'
  homepage 'http://www.paraview.org/'

  link 'paraview.app'
  caveats <<-EOS.undent
    This version of ParaView is for OS X Lion (10.7) or Mountain Lion (10.8)
    and should be installed if the system Python version is 2.6. If your
    OS version is Lion (10.7) or later, and your system Python version is
    2.7 or later, you may install this cask or the paraview-nightly cask.
    EOS
end
```
assistant