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document-api-python/tableaudocumentapi/workbook.py at master · RobertCoop/document-api-python · GitHub
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tableaudocumentapi
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workbook.py
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workbook.py
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###############################################################################
#
# Workbook - A class for writing Tableau workbook files
#
###############################################################################
import
weakref
from
tableaudocumentapi
import
Datasource
,
xfile
from
tableaudocumentapi
.
xfile
import
xml_open
class
Workbook
(
object
):
"""
A class for writing Tableau workbook files.
"""
###########################################################################
#
# Public API.
#
###########################################################################
def
__init__
(
self
,
filename
):
"""
Constructor.
"""
self
.
_filename
=
filename
self
.
_workbookTree
=
xml_open
(
self
.
_filename
,
self
.
__class__
.
__name__
.
lower
())
self
.
_workbookRoot
=
self
.
_workbookTree
.
getroot
()
# prepare our datasource objects
self
.
_datasources
=
self
.
_prepare_datasources
(
self
.
_workbookRoot
)
# self.workbookRoot.find('datasources')
self
.
_datasource_index
=
self
.
_prepare_datasource_index
(
self
.
_datasources
)
self
.
_worksheets
=
self
.
_prepare_worksheets
(
self
.
_workbookRoot
,
self
.
_datasource_index
)
###########
# datasources
###########
@
property
def
datasources
(
self
):
return
self
.
_datasources
###########
# worksheets
###########
@
property
def
worksheets
(
self
):
return
self
.
_worksheets
###########
# filename
###########
@
property
def
filename
(
self
):
return
self
.
_filename
def
save
(
self
):
"""
Call finalization code and save file.
Args:
None.
Returns:
Nothing.
"""
# save the file
xfile
.
_save_file
(
self
.
_filename
,
self
.
_workbookTree
)
def
save_as
(
self
,
new_filename
):
"""
Save our file with the name provided.
Args:
new_filename: New name for the workbook file. String.
Returns:
Nothing.
"""
xfile
.
_save_file
(
self
.
_filename
,
self
.
_workbookTree
,
new_filename
)
###########################################################################
#
# Private API.
#
###########################################################################
@
staticmethod
def
_prepare_datasource_index
(
datasources
):
retval
=
weakref
.
WeakValueDictionary
()
for
datasource
in
datasources
:
retval
[
datasource
.
name
]
=
datasource
return
retval
@
staticmethod
def
_prepare_datasources
(
xml_root
):
datasources
=
[]
# loop through our datasources and append
datasource_elements
=
xml_root
.
find
(
'datasources'
)
if
datasource_elements
is
None
:
return
[]
for
datasource
in
datasource_elements
:
ds
=
Datasource
(
datasource
)
datasources
.
append
(
ds
)
return
datasources
@
staticmethod
def
_prepare_worksheets
(
xml_root
,
ds_index
):
worksheets
=
[]
worksheets_element
=
xml_root
.
find
(
'.//worksheets'
)
if
worksheets_element
is
None
:
return
worksheets
for
worksheet_element
in
worksheets_element
:
worksheet_name
=
worksheet_element
.
attrib
[
'name'
]
worksheets
.
append
(
worksheet_name
)
# TODO: A real worksheet object, for now, only name
dependencies
=
worksheet_element
.
findall
(
'.//datasource-dependencies'
)
for
dependency
in
dependencies
:
datasource_name
=
dependency
.
attrib
[
'datasource'
]
datasource
=
ds_index
[
datasource_name
]
for
column
in
dependency
.
findall
(
'.//column'
):
column_name
=
column
.
attrib
[
'name'
]
if
column_name
in
datasource
.
fields
:
datasource
.
fields
[
column_name
].
add_used_in
(
worksheet_name
)
return
worksheets
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