rx/core/observablebase.py
def is_empty(self) -> 'ObservableBase':
        """Determines whether an observable sequence is empty.

        Returns:
            An observable sequence containing a single element
            determining whether the source sequence is empty.
        """

        return self.some().map(lambda b: not b)
Determines whether an observable sequence is empty.

        Returns:
            An observable sequence containing a single element
            determining whether the source sequence is empty.
        
Determines whether an observable sequence is empty.
Determines whether an observable sequence is empty .
def is_empty(self) -> 'ObservableBase':
        return self.some().map(lambda b: not b)
def is_empty ( self ) -> 'ObservableBase' : return self . some ( ) . map ( lambda b : not b )
Determines whether an observable sequence is empty.
Determines whether an observable sequence is empty .
"""Determines whether an observable sequence is empty.

        Returns:
            An observable sequence containing a single element
            determining whether the source sequence is empty.
        """
An observable sequence containing a single element
determining whether the source sequence is empty.
An observable sequence containing a single element determining whether the source sequence is empty .
self