import reactivex
from reactivex import operators as ops

"""
Specify the error to be raised in place of the # symbol.
"""

err = ValueError("I don't like 5!")

src0 = reactivex.from_marbles("12-----4-----67--|", timespan=0.2)
src1 = reactivex.from_marbles("----3----5-#      ", timespan=0.2, error=err)

source = reactivex.merge(src0, src1).pipe(ops.do_action(print))
source.run()