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WIP: add python eval/exec to cells #188

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WIP: add python eval/exec to cells #188

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8a14590
first attempt at adding python eval to cells
Jan 29, 2021
77c851b
adding formula attributes to hot object
Jan 29, 2021
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7 changes: 5 additions & 2 deletions ipysheet/easy.py
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,10 @@ def sheet(key=None, rows=5, columns=5, column_width=None, row_headers=True, colu
elif key is None or key not in _sheets:
_last_sheet = cls(rows=rows, columns=columns, column_width=column_width,
row_headers=row_headers, column_headers=column_headers,
stretch_headers=stretch_headers, **kwargs)
stretch_headers=stretch_headers,
**kwargs)
locals_dict = {'S': _last_sheet}
_last_sheet.locals().update(locals_dict)
if key is not None:
_sheets[key] = _last_sheet
else:
Expand Down Expand Up @@ -142,7 +145,7 @@ def cell(row, column, value=0., type=None, color=None, background_color=None,
c = Cell(value=value, row_start=row, column_start=column, row_end=row, column_end=column,
squeeze_row=True, squeeze_column=True, type=type, style=style, choice=choice,
read_only=read_only, numeric_format=numeric_format, date_format=date_format,
renderer=renderer, **kwargs)
renderer=renderer, sheet=_last_sheet, **kwargs)
if _hold_cells:
_cells += (c,)
else:
Expand Down
142 changes: 100 additions & 42 deletions ipysheet/sheet.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,55 @@
semver_range_frontend = "~" + __version_js__


@widgets.register('ipysheet.Sheet')
class Sheet(widgets.DOMWidget):
""""""
_view_name = Unicode('SheetView').tag(sync=True)
_model_name = Unicode('SheetModel').tag(sync=True)
_view_module = Unicode('ipysheet').tag(sync=True)
_model_module = Unicode('ipysheet').tag(sync=True)
_view_module_version = Unicode(semver_range_frontend).tag(sync=True)
_model_module_version = Unicode(semver_range_frontend).tag(sync=True)

rows = CInt(3).tag(sync=True)
columns = CInt(4).tag(sync=True)
cells = Tuple().tag(sync=True, **widgets.widget_serialization)
named_cells = Dict(value={}, allow_none=False).tag(sync=True, **widgets.widget_serialization)
row_headers = Union([Bool(), List(Unicode())], default_value=True).tag(sync=True)
column_headers = Union([Bool(), List(Unicode())], default_value=True).tag(sync=True)
stretch_headers = Unicode('all').tag(sync=True)
column_width = Union([CInt(), List(CInt())], default_value=None, allow_none=True).tag(sync=True)
column_resizing = Bool(True).tag(sync=True)
row_resizing = Bool(True).tag(sync=True)
search_token = Unicode('').tag(sync=True)

layout = LayoutTraitType(kw=dict(height='auto', width='auto')).tag(sync=True, **widgets.widget_serialization)
_locals = Dict(value={}, allow_none=False).tag(sync=False, **widgets.widget_serialization)
def __getitem__(self, item):
'''Gets a previously created cell at row and column

Example:

>>> sheet = ipysheet.sheet(rows=10, columns=5)
>>> cell = ipysheet.cell(2,0, value='hello')
>>> assert sheet[2,0] is cell
>>> sheet[2,0].value = 'bonjour'

'''
row, column = item
for cell in self.cells:
if cell.row_start == row and cell.column_start == column \
and cell.row_end == row and cell.column_end == column:
return cell
raise IndexError('no cell was previously created for (row, index) = (%s, %s)'.format(row, column))
def locals(self):
return self._locals

def exec_eval(self, proposal):
for cell in self.cells:
cell.exec_eval()


@widgets.register('ipysheet.Cell')
class Cell(widgets.Widget):
_model_name = Unicode('CellRangeModel').tag(sync=True)
Expand All @@ -20,6 +69,8 @@ class Cell(widgets.Widget):

# value = Union([Bool(), Unicode(), Float(), Int()], allow_none=True, default_value=None).tag(sync=True)
value = Any().tag(sync=True, **create_value_serializer('value'))
formula = Unicode(None, allow_none=True).tag(sync=True,
**create_value_serializer('formula'))
row_start = CInt(3).tag(sync=True)
column_start = CInt(4).tag(sync=True)
row_end = CInt(3).tag(sync=True)
Expand All @@ -36,6 +87,55 @@ class Cell(widgets.Widget):
numeric_format = Unicode('0.000', allow_none=True).tag(sync=True)
date_format = Unicode('YYYY/MM/DD', allow_none=True).tag(sync=True)
time_format = Unicode('h:mm:ss a', allow_none=True).tag(sync=True)
sheet = Instance(Sheet,allow_none=False).tag(sync=False)

def exec_eval(self, proposal=None):
if proposal is None:
formula = self.formula
if formula in [None, 'None']:
return
else:
formula = proposal.new
if formula in [None, 'None']:
if proposal.old in [None, 'None']:
return
self.formula = None
self.value = None
return
isstatement = False
try:
code= compile(formula, '<string>', 'eval')
except SyntaxError:
isstatement= True
code= compile(formula, '<string>', 'exec')
value = None
_locals = self.sheet.locals()
try:
if isstatement:
exec(code,{},_locals)
else:
value = eval(code,{},_locals)
except Exception as e:
raise e
if value is not None:
try:
self.value = value
except ValueError:
self.value = repr(value)
else:
self.value=formula



@traitlets.observe('formula')
def _observe_formula(self,proposal):
self.exec_eval(proposal)

@traitlets.observe('value')
def _observe_value(self,proposal):

self.sheet.exec_eval(proposal)


@traitlets.validate('value')
def _validate_value(self, proposal):
Expand Down Expand Up @@ -80,48 +180,6 @@ class Range(widgets.Widget):
value = Union([List(), List(Instance(list))], default_value=[0, 1]).tag(sync=True)


@widgets.register('ipysheet.Sheet')
class Sheet(widgets.DOMWidget):
""""""
_view_name = Unicode('SheetView').tag(sync=True)
_model_name = Unicode('SheetModel').tag(sync=True)
_view_module = Unicode('ipysheet').tag(sync=True)
_model_module = Unicode('ipysheet').tag(sync=True)
_view_module_version = Unicode(semver_range_frontend).tag(sync=True)
_model_module_version = Unicode(semver_range_frontend).tag(sync=True)

rows = CInt(3).tag(sync=True)
columns = CInt(4).tag(sync=True)
cells = Tuple().tag(sync=True, **widgets.widget_serialization)
named_cells = Dict(value={}, allow_none=False).tag(sync=True, **widgets.widget_serialization)
row_headers = Union([Bool(), List(Unicode())], default_value=True).tag(sync=True)
column_headers = Union([Bool(), List(Unicode())], default_value=True).tag(sync=True)
stretch_headers = Unicode('all').tag(sync=True)
column_width = Union([CInt(), List(CInt())], default_value=None, allow_none=True).tag(sync=True)
column_resizing = Bool(True).tag(sync=True)
row_resizing = Bool(True).tag(sync=True)
search_token = Unicode('').tag(sync=True)

layout = LayoutTraitType(kw=dict(height='auto', width='auto')).tag(sync=True, **widgets.widget_serialization)

def __getitem__(self, item):
'''Gets a previously created cell at row and column

Example:

>>> sheet = ipysheet.sheet(rows=10, columns=5)
>>> cell = ipysheet.cell(2,0, value='hello')
>>> assert sheet[2,0] is cell
>>> sheet[2,0].value = 'bonjour'

'''
row, column = item
for cell in self.cells:
if cell.row_start == row and cell.column_start == column \
and cell.row_end == row and cell.column_end == column:
return cell
raise IndexError('no cell was previously created for (row, index) = (%s, %s)'.format(row, column))


class Renderer(widgets.Widget):
_model_name = Unicode('RendererModel').tag(sync=True)
Expand Down
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