Python real time class methods

Python real time class methods

Python is a great programming language with countless merits. However, one short coming (compared with Matlab e.g.) is that one often has to restart the program in order to refresh the modified the code, which is kind of a hassle. Below, I will show what I did to circumvent this problem. Basically, I define the class method in another file, say methods.py, which is different from the file that contains the definition of the class, say myclass.py. Then I found a way to reload (or redefine) all the instance (or class) methods.

class MyClass():
    def __init__(self):
        import methods as methods;
        self.add_extended_methods(methods);
        pass;

    def add_extended_methods(self, methods):
        import inspect;      
        if not methods.lazy:
            reload(methods);
        self.methods=methods;
        
        modulefile=inspect.getfile(methods);
        modulefile=modulefile.replace('.pyc','.py');
        
        for k in methods.__dict__.keys():
            expr="methods."+k;
            v=eval(expr);
            if inspect.isfunction(v) and inspect.getfile(v)==modulefile:
                cmd="def "+k+"(self,*args, **kwargs):return self.methods."+k+"(self,*args, **kwargs);"
                exec(cmd);
                import new;
                cmd="self."+k+"=new.instancemethod("+k+", self, MyClass)";
                exec(cmd);

One can also call the "add_extended_methods" anytime when he wants to use updated methods.

This saved me a lot of time from restarting the whole Python/Program

Parameters of multiferroics:

Parameters of multiferroics:

Type	Name	TC (K)	TN (K)	Polarization (uC/cm^2)	Critical field	Other critical temperatures
I.1 Lone pair FE	BiFeO3	1100	640	100	20 T quenching spiral, 10 T spiral rotation [Xu2009]	140 K spin reorientation
I.2 Geometric FE	YMnO3	1200	42	5
II.1 Valence order of magnetic ions	LuFe2O4	320	240	25	see phase diagram of [Xu2008]
III.1 Spiral Magnets	TbMnO3	41	28	6e-2
III.2 frustrated collinear M	Ca3CoMnO6	16.5	16.5	9e-2

[Xu2008] Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4

Author(s): Xu XS, Angst M, Brinzari TV, et al.
Source: PHYSICAL REVIEW LETTERS   Volume: 101   Issue: 22 Article Number: 227602   Published: NOV 28 2008


[Xu2009] Optical properties and magnetochromism in multiferroic BiFeO3

Author(s): Xu XS, Brinzari TV, Lee S, et al.
Source: PHYSICAL REVIEW B   Volume: 79   Issue: 13 Article Number: 134425   Published: APR 2009

classes of multiferroics

category of multiferroics

	Type-I FE, M order from different subsystem Tc>>TN	Type-II FE, M order from same subsystem, but independent origin Tc>TN	Type-III FE caused by M order TC<=TN
SubType:	I.1 Lone pair FE	II.1 Valence order of magnetic ions	III.1 Spiral Magnets
Example:	BiFeO3 TC: 1100 TN: 640 K P: 100uC/cm^2 [Xu2009Ref] Intro: perovskite, A disp along (111)	LuFe2O4 TCO: 320 K TN: 240 K  [Xu2008] P: 25 uC/cm2	TbMnO3 TN=41K TC=28K P: 6e-2 [Kimura2007] Intro: inverse Dzyaloshinskii–Moriya effect. P~Qxe, where three symbols are ploarization, spiral propagation direction and normal vector of the spiral plan
Other Examples:	{BiMnO3, PbVO3}		Ni3V2O6, MnWO4, CuO orthorhombic RMnO3 (R=Tb,Dy)
SubType:	I.2 Geometric FE		III.2 frustrated collinear M
Example	YMnO3 TC: 1200 K TN: 42 K P: 5 μC/cm^2 [VanAken2004] Intro: perovskite, BO6 title, then A goes up and down asymmetrically		Ca3CoMnO6 TN, TC=16.5 K, P: 9e-2 uC/cm2 Intro: magnetostriction
Other Examples:	hexagonal RMnO3 (R=Ho-Lu)		RMn2O5 (R=Pr-Lu, Bi,Y)

[Kimura2007] Spiral magnets as magnetoelectrics
Author(s): Kimura T
Source: ANNUAL REVIEW OF MATERIALS RESEARCH   Volume: 37   Pages: 387-413   Published: 2007


[VanAken2004] The origin of ferroelectricity in magnetoelectric YMnO3

Author(s): Van Aken BB, Palstra TTM, Filippetti A, et al.
Source: NATURE MATERIALS   Volume: 3   Issue: 3   Pages: 164-170   Published: MAR 2004


[Xu2008] Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4

Author(s): Xu XS, Angst M, Brinzari TV, et al.
Source: PHYSICAL REVIEW LETTERS   Volume: 101   Issue: 22 Article Number: 227602   Published: NOV 28 2008


[Xu2009] Optical properties and magnetochromism in multiferroic BiFeO3

Author(s): Xu XS, Brinzari TV, Lee S, et al.
Source: PHYSICAL REVIEW B   Volume: 79   Issue: 13 Article Number: 134425   Published: APR 2009