IOHandlers.gal — GAL Plugin for PySAL’s FileIO System

New in version 1.0.

class pysal.core.IOHandlers.gal.GalIO(*args, **kwargs)

Opens, reads, and writes file objects in GAL format.

Examples

>>> import tempfile, pysal, os
>>> w = pysal.open('../../examples/sids2.gal','r').read()
>>> f = tempfile.NamedTemporaryFile(suffix='.gal')
>>> fname = f.name
>>> f.close()
>>> o = pysal.open(fname,'w')
>>> o.write(w)
>>> o.close()
>>> wnew =  pysal.open(fname,'r').read()
>>> wnew.pct_nonzero == w.pct_nonzero
True
>>> os.remove(fname)

Methods

by_row
cast
check
close
flush
get
getType
next
open
read
seek
tell
truncate
write

class by_row(parent)

GalIO.cast(key, typ)

cast key as typ

classmethod GalIO.check()

Prints the contents of the registry

GalIO.close()

GalIO.data_type

GalIO.flush()

GalIO.get(n)

Seeks the file to n and returns n If .ids is set n should be an id, else, n should be an offset

static GalIO.getType(dataPath)

Parse the dataPath and return the data type

GalIO.ids

GalIO.next()

A FileIO object is its own iterator, see StringIO

classmethod GalIO.open(*args, **kwargs)

Alias for FileIO()

GalIO.rIds

GalIO.read(n=-1)

GalIO.seek(pos)

GalIO.tell()

Return id (or offset) of next object

GalIO.truncate(size=None)

Should be implemented by subclasses and redefine this doc string

GalIO.write(obj)

Parameters:

.write(weightsObject) :

accepts a weights object :

Returns :

—— :

a GAL file :

write a weights object to the opened GAL file. :