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# numpy.DataSource

class `numpy.``DataSource`(destpath='.')

  A generic data source file (file, http, ftp, ...).

  DataSources can be local files or remote files/URLs. The files may also be compressed or uncompressed. DataSource hides some of the low-level details of downloading the file, allowing you to simply pass in a valid file path (or URL) and obtain a file object.

  Parameters: | destpath : str or None, optional Path to the directory where the source file gets downloaded to for use. If destpath is None, a temporary directory will be created. The default path is the current directory.

  Notes

  URLs require a scheme string (`http://`) to be used, without it they will fail:

      >>> repos = DataSource()
      >>> repos.exists('www.google.com/index.html')
      False
      >>> repos.exists('http://www.google.com/index.html')
      True

  Temporary directories are deleted when the DataSource is deleted.

  Examples

      >>> ds = DataSource('/home/guido')
      >>> urlname = 'http://www.google.com/index.html'
      >>> gfile = ds.open('http://www.google.com/index.html')  # remote file
      >>> ds.abspath(urlname)
      '/home/guido/www.google.com/site/index.html'

      >>> ds = DataSource(None)  # use with temporary file
      >>> ds.open('/home/guido/foobar.txt')
      <open file '/home/guido.foobar.txt', mode 'r' at 0x91d4430>
      >>> ds.abspath('/home/guido/foobar.txt')
      '/tmp/tmpy4pgsP/home/guido/foobar.txt'

  Methods

  `abspath`(path) | Return absolute path of file in the DataSource directory.
  `exists`(path) | Test if path exists.
  `open`(path[, mode]) | Open and return file-like object.