Pandas: Series - all() function

Test whether all element is true over requested Pandas axis

The all() function is used to check whether all elements are True, potentially over an axis.

Returns True unless there at least one element within a series or along a Dataframe axis that is False or equivalent (e.g. zero or empty).


Series.all(self, axis=0, bool_only=None, skipna=True, level=None, **kwargs)
Pandas Series all image


Name Description Type/Default Value Required / Optional
axis Indicate which axis or axes should be reduced.
  • 0 / ‘index’ : reduce the index, return a Series whose index is the original column labels.
  • 1 / ‘columns’ : reduce the columns, return a Series whose index is the original index.
  • None : reduce all axes, return a scalar.

{0 or ‘index’, 1 or ‘columns’, None}
Default Value: 0

bool_only Include only boolean columns. If None, will attempt to use everything, then use only boolean data. Not implemented for Series. bool
Default Value: None
skipna Exclude NA/null values. If the entire row/column is NA and skipna is True, then the result will be True, as for an empty row/column. If skipna is False, then NA are treated as True, because these are not equal to zero. bool
Default Value: True
level If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a scalar. nt or level name
Default Value: None
kwargs Additional keywords have no effect but might be accepted for compatibility with NumPy. any
Default Value: None

Returns: scalar or Series
If level is specified, then, Series is returned; otherwise, scalar is returned.


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