def _date_input(
self,
label: str,
value=None,
min_value=None,
max_value=None,
key: Optional[Key] = None,
help: Optional[str] = None,
on_change: Optional[WidgetCallback] = None,
args: Optional[WidgetArgs] = None,
kwargs: Optional[WidgetKwargs] = None,
*, # keyword-only arguments:
disabled: bool = False,
ctx: Optional[ScriptRunContext] = None,
) -> Union[date, Tuple[date, ...]]:
key = to_key(key)
check_callback_rules(self.dg, on_change)
check_session_state_rules(default_value=value, key=key)
# Set value default.
if value is None:
value = datetime.now().date()
single_value = isinstance(value, (date, datetime))
range_value = isinstance(value,
(list, tuple)) and len(value) in (0, 1, 2)
if not single_value and not range_value:
raise StreamlitAPIException(
"DateInput value should either be an date/datetime or a list/tuple of "
"0 - 2 date/datetime values")
if single_value:
value = [value]
value = [v.date() if isinstance(v, datetime) else v for v in value]
if isinstance(min_value, datetime):
min_value = min_value.date()
elif min_value is None:
if value:
min_value = value[0] - relativedelta.relativedelta(years=10)
else:
min_value = date.today() - relativedelta.relativedelta(
years=10)
if isinstance(max_value, datetime):
max_value = max_value.date()
elif max_value is None:
if value:
max_value = value[-1] + relativedelta.relativedelta(years=10)
else:
max_value = date.today() + relativedelta.relativedelta(
years=10)
if value:
start_value = value[0]
end_value = value[-1]
if (start_value < min_value) or (end_value > max_value):
raise StreamlitAPIException(
f"The default `value` of {value} "
f"must lie between the `min_value` of {min_value} "
f"and the `max_value` of {max_value}, inclusively.")
date_input_proto = DateInputProto()
date_input_proto.is_range = range_value
if help is not None:
date_input_proto.help = dedent(help)
date_input_proto.label = label
date_input_proto.default[:] = [
date.strftime(v, "%Y/%m/%d") for v in value
]
date_input_proto.min = date.strftime(min_value, "%Y/%m/%d")
date_input_proto.max = date.strftime(max_value, "%Y/%m/%d")
date_input_proto.form_id = current_form_id(self.dg)
date_input_proto.disabled = disabled
def deserialize_date_input(ui_value, widget_id=""):
if ui_value is not None:
return_value = [
datetime.strptime(v, "%Y/%m/%d").date() for v in ui_value
]
else:
return_value = value
return return_value[0] if single_value else tuple(return_value)
def serialize_date_input(v):
range_value = isinstance(v, (list, tuple))
to_serialize = list(v) if range_value else [v]
return [date.strftime(v, "%Y/%m/%d") for v in to_serialize]
current_value, set_frontend_value = register_widget(
"date_input",
date_input_proto,
user_key=key,
on_change_handler=on_change,
args=args,
kwargs=kwargs,
deserializer=deserialize_date_input,
serializer=serialize_date_input,
ctx=ctx,
)
if set_frontend_value:
date_input_proto.value[:] = serialize_date_input(current_value)
date_input_proto.set_value = True
self.dg._enqueue("date_input", date_input_proto)
return cast(date, current_value)
def date_input(
self,
label: str,
value=None,
min_value=None,
max_value=None,
key: Optional[Key] = None,
help: Optional[str] = None,
on_change: Optional[WidgetCallback] = None,
args: Optional[WidgetArgs] = None,
kwargs: Optional[WidgetKwargs] = None,
) -> date:
"""Display a date input widget.
Parameters
----------
label : str
A short label explaining to the user what this date input is for.
value : datetime.date or datetime.datetime or list/tuple of datetime.date or datetime.datetime or None
The value of this widget when it first renders. If a list/tuple with
0 to 2 date/datetime values is provided, the datepicker will allow
users to provide a range. Defaults to today as a single-date picker.
min_value : datetime.date or datetime.datetime
The minimum selectable date. If value is a date, defaults to value - 10 years.
If value is the interval [start, end], defaults to start - 10 years.
max_value : datetime.date or datetime.datetime
The maximum selectable date. If value is a date, defaults to value + 10 years.
If value is the interval [start, end], defaults to end + 10 years.
key : str or int
An optional string or integer to use as the unique key for the widget.
If this is omitted, a key will be generated for the widget
based on its content. Multiple widgets of the same type may
not share the same key.
help : str
An optional tooltip that gets displayed next to the input.
on_change : callable
An optional callback invoked when this date_input's value changes.
args : tuple
An optional tuple of args to pass to the callback.
kwargs : dict
An optional dict of kwargs to pass to the callback.
Returns
-------
datetime.date
The current value of the date input widget.
Example
-------
>>> d = st.date_input(
... "When\'s your birthday",
... datetime.date(2019, 7, 6))
>>> st.write('Your birthday is:', d)
"""
key = to_key(key)
check_callback_rules(self.dg, on_change)
check_session_state_rules(default_value=value, key=key)
# Set value default.
if value is None:
value = datetime.now().date()
single_value = isinstance(value, (date, datetime))
range_value = isinstance(value,
(list, tuple)) and len(value) in (0, 1, 2)
if not single_value and not range_value:
raise StreamlitAPIException(
"DateInput value should either be an date/datetime or a list/tuple of "
"0 - 2 date/datetime values")
if single_value:
value = [value]
date_input_proto = DateInputProto()
date_input_proto.is_range = range_value
if help is not None:
date_input_proto.help = dedent(help)
value = [v.date() if isinstance(v, datetime) else v for v in value]
date_input_proto.label = label
date_input_proto.default[:] = [
date.strftime(v, "%Y/%m/%d") for v in value
]
if isinstance(min_value, datetime):
min_value = min_value.date()
elif min_value is None:
if value:
min_value = value[0] - relativedelta.relativedelta(years=10)
else:
min_value = date.today() - relativedelta.relativedelta(
years=10)
if isinstance(max_value, datetime):
max_value = max_value.date()
elif max_value is None:
if value:
max_value = value[-1] + relativedelta.relativedelta(years=10)
else:
max_value = date.today() + relativedelta.relativedelta(
years=10)
date_input_proto.min = date.strftime(min_value, "%Y/%m/%d")
date_input_proto.max = date.strftime(max_value, "%Y/%m/%d")
date_input_proto.form_id = current_form_id(self.dg)
def deserialize_date_input(ui_value, widget_id=""):
if ui_value is not None:
return_value = [
datetime.strptime(v, "%Y/%m/%d").date() for v in ui_value
]
else:
return_value = value
return return_value[0] if single_value else tuple(return_value)
def serialize_date_input(v):
to_serialize = [v] if single_value else list(v)
return [date.strftime(v, "%Y/%m/%d") for v in to_serialize]
current_value, set_frontend_value = register_widget(
"date_input",
date_input_proto,
user_key=key,
on_change_handler=on_change,
args=args,
kwargs=kwargs,
deserializer=deserialize_date_input,
serializer=serialize_date_input,
)
if set_frontend_value:
date_input_proto.value[:] = serialize_date_input(current_value)
date_input_proto.set_value = True
self.dg._enqueue("date_input", date_input_proto)
return cast(date, current_value)