def janoschek(x, a, beta, k, delta):
    'http://www.pisces-conservation.com/growthhelp/janoschek.htm\n\n    Parameters\n    ----------\n    x : int\n    a : float\n    beta : float\n    k : float\n    delta : float\n\n    Returns\n    -------\n    float\n        a - (a - beta) * np.exp(-k*x**delta)\n    '
    return (a - ((a - beta) * np.exp(((- k) * (x ** delta)))))
http://www.pisces-conservation.com/growthhelp/janoschek.htm

Parameters
----------
x : int
a : float
beta : float
k : float
delta : float

Returns
-------
float
    a - (a - beta) * np.exp(-k*x**delta)
def janoschek(x, a, beta, k, delta):
    'http://www.pisces-conservation.com/growthhelp/janoschek.htm\n\n    Parameters\n    ----------\n    x : int\n    a : float\n    beta : float\n    k : float\n    delta : float\n\n    Returns\n    -------\n    float\n        a - (a - beta) * np.exp(-k*x**delta)\n    '
    return (a - ((a - beta) * np.exp(((- k) * (x ** delta)))))