IOHandlers.pyDbfIO — DBF Plugin for PySAL’s FileIO System

The IOHandlers.pyDbfIO DBF Plugin for PySAL’s FileIO System

New in version 1.0.

class pysal.core.IOHandlers.pyDbfIO.DBF(*args, **kwargs)

PySAL DBF Reader/Writer

This DBF handler implements the PySAL DataTable interface.

Examples

>>> import pysal
>>> dbf = pysal.open('../../examples/juvenile.dbf', 'r')
>>> dbf.header
['ID', 'X', 'Y']
>>> dbf.field_spec
[('N', 9, 0), ('N', 9, 0), ('N', 9, 0)]

Attributes

Methods

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

class by_col(parent)

class DBF.by_row(parent)

DBF.cast(key, typ)

cast key as typ

classmethod DBF.check()

Prints the contents of the registry

DBF.close()

DBF.flush()

DBF.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 DBF.getType(dataPath)

Parse the dataPath and return the data type

DBF.ids

DBF.next()

A FileIO object is its own iterator, see StringIO

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

Alias for FileIO()

DBF.rIds

DBF.read(n=-1)

Read at most n objects, less if read hits EOF if size is negative or omitted read all objects until EOF returns None if EOF is reached before any objects.

DBF.read_record(i)

DBF.seek(i)

DBF.tell()

Return id (or offset) of next object

DBF.truncate(size=None)

Should be implemented by subclasses and redefine this doc string

DBF.write(obj)