AlloViz.AlloViz.Elements.Element._check_setitem_copy

Element._check_setitem_copy(t: str = 'setting', force: bool = False)

Parameters:

tstr, the type of setting error

forcebool, default False

If True, then force showing an error.

validate if we are doing a setitem on a chained copy.

It is technically possible to figure out that we are setting on

a copy even WITH a multi-dtyped pandas object. In other words, some

blocks may be views while other are not. Currently _is_view will ALWAYS

return False for multi-blocks to avoid having to handle this case.

df = DataFrame(np.arange(0,9), columns=[‘count’])

df[‘group’] = ‘b’

# This technically need not raise SettingWithCopy if both are view

# (which is not generally guaranteed but is usually True. However,

# this is in general not a good practice and we recommend using .loc.

df.iloc[0:5][‘group’] = ‘a’