human
Can you provide a the Python code you requested given the following:
I am working on the file "LandauPole.ipynb".
The first task is:
Automatic search and plotting
Can you write Python code for it?
assistant
#Here is the Python code you requested.

def find_pole(mchi=375, msig=10, mphi=None, mTHD=750, upto=1e10, invpole=1e-4, npts=3000, twoloop=True):
    """Return Landau pole and  RGE curves for theory."""
    if not mphi:
        mphi = mchi
    threshs, cRGE = precalcRGE(thresholds=[(mchi, RealScalar(1,7,0)), (mphi, ComplexScalar(1,5,-2)), (mTHD, ComplexScalar(1,2,1)), (msig*1e3, Weyl(1,5,0,ng))])
    def func(y, t):
        """Derivative of inverse alpha.
        d inv_alpha/dt = c0 + c1/inv_alpha
        """
        c0, c1 = cRGE[np.searchsorted(threshs, t)-1]
        if twoloop:
            return c0 + c1.dot(1/y)
        else:
            return c0 
    ystart = y0
    ts = np.linspace(0, t(upto), npts)
    while np.any(abs(ystart) > invpole):
        ys = odeint(func, y0, ts) 
        try:
            last = np.where(ys<invpole)[0][0]-1   # note that negative will also satisfy here
        except IndexError:
            break
        ystart = ys[last]
        ts = np.linspace(ts[last], ts[last+1], npts)
    #print("Two-loop pole is at {:.2g} GeV.".format(mu(ts[last])))
    pole = mu(ts[last])
    ts = np.linspace(0, ts[last], npts)
    ys = odeint(func, y0, ts) 
    return pole #, ts, ys