Refocused2D.optimal_tau1 accepts only one argument but two arguments are given in calc_deer_settings()

[ehuang94]

There is an issue when calling calc_deer_settings() to optimize tau 1 for the 4pDEER experiment.

This is a piece of the code in calc_deer_settings():

if tau2 < 2.5:
tau1,tau2 = Refocused2D.optimal_tau1(type='4pDEER',tau2=2.5)

However, the optimal_tau1 only accepts one argument and returns one value:

def optimal_tau1(self,tau2=None,):
...
return self.tau1

[HKaras]

A hot fix has now been merged. This function will soon be rewritten.