[Quantlib-users] ql.Estr and ql.Euribor

[Victoria T. <vic...@we...>]

Hello,

I don't understand why ql.Estr can be called without nothing: ql.Estr(), or
with a Yield term structureHandle in argument.
Actually, if I put a yieldTermstructureHandle, in what way the Estrcurve
will change? which information does the function take from this argument?

Same questions for ql.Euribor, where you can specify a
ZeroCurveTermStructure as last argument if you want: how does it change the
result?

I didn't find any answer on the blogs and docs.

Thank you in advance for your answer.