[IPython-User] unfold a function in ipython?

[Chao YUE]

Dear all,

suppose I have a function defined within ipython interactive session:

In [19]: %psource day_length
def day_length(L,J):
    #D = daylength
    #L = latitude (in degree, north positive and south negative)
    #J = day of the year

    P = np.arcsin(0.39795*np.cos(0.2163108 +
2*np.arctan(0.9671396*np.tan(0.00860*(J-186)))))
    x1=np.sin(0.8333*np.pi/180) + np.sin(L*np.pi/180)*np.sin(P)
    x2=np.cos(L*np.pi/180)*np.cos(P)
    D = 24 - (24/np.pi)*np.arccos(x1/x2)
    return D

Now I want to see explicitly the process of variables when I call the
function with

In [18]: day_length(89.5,180)
Out[18]: nan

Is there some way to do this?

cheers,

Chao

-- 
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Chao YUE
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
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