OtherTest

Question 1

Pandas - Properties.## Filtrer un DataFrame.

Par les labels ?

Answer 1

pandas.DataFrame.loc

_property_DataFrame.loc[source]

Access a group of rows and columns by label(s) or a boolean array.

.loc[]is primarily label based, but may also be used with a boolean array.

Allowed inputs are:

• A single label, e.g.5or'a', (note that5is interpreted as a_label_of the index, andneveras an integer position along the index).
• A list or array of labels, e.g.['a','b','c'].
• A slice object with labels, e.g.'a':'f'.WarningNote that contrary to usual python slices,boththe start and the stop are included
• A boolean array of the same length as the axis being sliced, e.g.[True,False,True].
• An alignable boolean Series. The index of the key will be aligned before masking.
• An alignable Index. The Index of the returned selection will be the input.
• Acallablefunction with one argument (the calling Series or DataFrame) and that returns valid output for indexing (one of the above)

See more atSelection by Label.

Raises:

KeyError

If any items are not found.

IndexingError

If an indexed key is passed and its index is unalignable to the frame index.