def __setitem__(self, item, value):
"""
Update values in Frame, in-place.
"""
return make_datatable(self,
*resolve_selector(item),
mode="update",
replacement=value)
def __delitem__(self, item):
"""
Delete columns / rows from the Frame.
Example:
del df["colA"]
del df[:, ["A", "B"]]
del df[::2]
del df["col5":"col9"]
del df[(i for i in range(df.ncols) if i % 3 <= 1)]
"""
return make_datatable(self, *resolve_selector(item), mode="delete")
def __getitem__(self, item):
"""
Simpler version than __call__, but allows slice literals.
Example:
df[5] # 6-th column
df[5, :] # 6-th row
df[:10, -1] # first 10 rows of the last column
df[::-1, :] # all rows of the Frame in reverse order
etc.
"""
return make_datatable(self, *resolve_selector(item))
def __delitem__(self, item):
"""
Delete columns / rows from the datatable.
Example:
del dt["colA"]
del dt[:, ["A", "B"]]
del dt[::2]
del dt["col5":"col9"]
del dt[(i for i in range(dt.ncols) if i % 3 <= 1)]
"""
drows, dcols = resolve_selector(item)
return make_datatable(self, drows, dcols, mode="delete")
