def test_check_new_headers():
"""Check that we get good error messages when setting bad headers."""
table = Table(value=_TABLE_DATA["dict"])
with pytest.raises(ValueError) as e:
table.column_headers = ("a", "b", "c", "d")
assert "Length mismatch" in str(e)
with pytest.raises(ValueError) as e:
table.row_headers = ("a", "b", "c", "d")
assert "Length mismatch" in str(e)
def test_table(key):
"""Test a few ways to input tables."""
input = _TABLE_DATA[key]
table = Table(value=input)
if key == "split":
assert table.value == input
if key not in ("tuple", "data"):
# make sure the output is the same as the input
assert table.to_dict(key) == input
# can also test equality of table widgets
assert Table(value=table.to_dict(key)) == table
table.row_headers = ("x", "x")
table.column_headers = ("a", "a", "b")
with pytest.warns(UserWarning):
table.to_dict(key)
# it behaves like a dict:
table["new_col"] = [5, 5]
assert table.pop("new_col") == [5, 5]
# keys and items have both regular (column) and "row" modes
col_item_view = table.items() # iterate col_header/column
row_item_view = table.items("row") # iterate row_header/row
# we can just call dict() to get back our dict of lists
assert dict(table) == dict_of_lists
# or use one of many other exports in `to_dict`
assert table.to_dict("records") == list_of_records
# change headers
table.row_headers = ("row1", "row2")
table.column_headers = ("a", "b", "c")
# setting value clears and resets the table:
table.value = np.arange(18).reshape(6, 3)
# we can get/set/delete the 2D data table using numpy-style indexing:
# get every other row
assert table.data[::2] == [[0, 1, 2], [6, 7, 8], [12, 13, 14]]
# set every other column in the 3rd row
table.data[2, ::2] = [99, 99]
# export to numpy or pandas
# table.data.to_numpy()
# table.to_dataframe()
table.show(run=True)