Python Huayno.stop方法代码示例

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test1(self):
     convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
 
     huayno = Huayno(convert_nbody)
     huayno.initialize_code()
     huayno.parameters.epsilon_squared = 0.0 | units.AU**2
     
     stars = self.new_system_of_sun_and_earth()
     earth = stars[1]
     
     huayno.particles.add_particles(stars)
     
     huayno.evolve_model(365.0 | units.day)
     huayno.particles.copy_values_of_all_attributes_to(stars)
     
     position_at_start = earth.position.value_in(units.AU)[0]
     position_after_full_rotation = earth.position.value_in(units.AU)[0]
     self.assertAlmostEqual(position_at_start, position_after_full_rotation, 6)
     
     huayno.evolve_model(365.0 + (365.0 / 2) | units.day)
     
     huayno.particles.copy_values_of_all_attributes_to(stars)
     position_after_half_a_rotation = earth.position.value_in(units.AU)[0]
     self.assertAlmostEqual(-position_at_start, position_after_half_a_rotation, 2)
             
     huayno.evolve_model(365.0 + (365.0 / 2) + (365.0 / 4)  | units.day)
     
     huayno.particles.copy_values_of_all_attributes_to(stars)
     position_after_half_a_rotation = earth.position.value_in(units.AU)[1]
     self.assertAlmostEqual(-position_at_start, position_after_half_a_rotation, 3)
     
     huayno.cleanup_code()
     
     huayno.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test16(self):
     instance = Huayno()
     instance.parameters.epsilon_squared = 0.0 | nbody_system.length**2
     
     particles = datamodel.Particles(2)
     particles.mass = [1.] | nbody_system.mass
     particles.radius =  [0.0] | nbody_system.length
     particles.position = [[0.0,0.0,0.0],[1.0,0.0,0.0]] | nbody_system.length
     particles.velocity = [[0.0, 0.0, 0.0]] | nbody_system.speed
     instance.particles.add_particles(particles)
     
     zero = 0.0 | nbody_system.length
     
     for x in (0.25, 0.5, 0.75):
         x0 = x | nbody_system.length
         potential0 = instance.get_potential_at_point(zero, x0, zero, zero)
         fx0, fy0, fz0 = instance.get_gravity_at_point(zero, x0, zero, zero)
         
         self.assertAlmostEqual(fy0, 0.0 | nbody_system.acceleration,14)
         self.assertAlmostEqual(fz0, 0.0 | nbody_system.acceleration,14)
         
         fx = (-1.0 / (x0**2)+1.0 / (((1.0|nbody_system.length)-x0)**2)) * (1.0 | nbody_system.length ** 3 / nbody_system.time ** 2)
         self.assertAlmostEqual(fx, fx0,14)
         self.assertAlmostEqual(potential0, -nbody_system.G*(1.|nbody_system.mass)*(1./x0+1./((1.|nbody_system.length)-x0)),14)
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test13(self):
     particles = plummer.new_plummer_model(31)
    
     instance = Huayno(number_of_workers=1)#, debugger="xterm")
     instance.initialize_code()
     instance.parameters.epsilon_squared = 0.01 | nbody_system.length ** 2
     instance.particles.add_particles(particles)
     
     instance.evolve_model(0.1 | nbody_system.time)
     instance.synchronize_model()
     expected_positions = instance.particles.position
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
def binary_with_planet_run(m1=1.|units.MSun, m2=1.| units.MSun, m_planet=1|units.MJupiter,
                           r1=None, r2=None, r_planet=None, ecc_binary=0, P_binary=20 | units.day,
                           ecc_planet=0., P_planet=1.| units.yr, pangle_planet=0., a_planet=None,
                           tend=100. | units.yr,hostname=''):

    dEcrit=1.e-6

    three=binary_with_planet(m1=m1,m2=m2,m_planet=m_planet,r1=r1,r2=r2,r_planet=r_planet,
             ecc_binary=ecc_binary,P_binary=P_binary,
             ecc_planet=ecc_planet,a_planet=a_planet,pangle_planet=pangle_planet)
    
    convert=nbody_system.nbody_to_si(1|units.MSun,1|units.AU)
    code=Huayno(convert,hostname=hostname)
    
    code.parameters.inttype_parameter=code.inttypes.SHARED10
    code.parameters.timestep_parameter=.2
    code.parameters.timestep=100. | units.day
        
    dt=10000. | units.day
    
    code.particles.add_particles(three)

    E0=code.potential_energy+code.kinetic_energy
    a0,eps0,pangle0=elements( three.total_mass(),
          code.particles.x[2],
          code.particles.y[2],
          code.particles.z[2],
          code.particles.vx[2],
          code.particles.vy[2],
          code.particles.vz[2] )

    t=0. | units.day
    result="stable"
    while(t < tend-dt/2):
        t=t+dt
        code.evolve_model(t)
        E=code.potential_energy+code.kinetic_energy    
        dE=abs(((E-E0)/E0))
        a,eps,pangle=elements( three.total_mass(),
          code.particles.x[2],
          code.particles.y[2],
          code.particles.z[2],
          code.particles.vx[2],
          code.particles.vy[2],
          code.particles.vz[2] )
        if dE > dEcrit or a<0.5*a0 or a>2.*a0:
          result="unstable"
          if dE > dEcrit:
            result="failed"
          break
    code.stop()
    return result,t,dE,a.in_(units.AU),eps,pangle

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
    def test14(self):
        import hashlib

        numpy.random.seed(123456)
        particles = plummer.new_plummer_model(64)
        sha=hashlib.sha1()

        class inttypes(object):
            SHARED2=1
            EXTRAPOLATE=5
            PASS_KDK=2
            PASS_DKD=7
            HOLD_KDK=3
            HOLD_DKD=8
            PPASS_DKD=9
            BRIDGE_KDK=4
            BRIDGE_DKD=10
            CC=11
            CC_KEPLER=12
            OK=13
            KEPLER=14
            SHARED4=15
            SHARED6=18
            SHARED8=19
            SHARED10=20
            SHAREDBS=21
           
            @classmethod
            def _list(cls):
                  return set([x for x in cls.__dict__.keys() if not x.startswith('_')])

        for itype in sorted(inttypes._list()):
            if itype in ("KEPLER"): continue
            instance = Huayno()
            instance.parameters.inttype_parameter=getattr(Huayno.inttypes,itype)
            instance.particles.add_particles(particles)
            instance.evolve_model(0.125 | nbody_system.time)
            part_out= instance.particles.copy()
            position = part_out.position.number
            if hasattr(position,'tobytes'):
                as_bytes = position.tobytes()
            else:
                as_bytes = numpy.copy(position.data, order='C')
            sha.update(as_bytes)
            
            instance.stop()
        
        # this result is probably dependent on system architecture hence no good for assert
        print 
        print sha.hexdigest()
        print "8e71f9441578a43af4af927943577ad2c4130e4c"

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def _run_collision_with_integrator(self, inttype_parameter):
     particles = datamodel.Particles(7)
     particles.mass = 0.001 | nbody_system.mass
     particles.radius = 0.01 | nbody_system.length
     particles.x = [-101.0, -100.0, -0.5, 0.5, 100.0, 101.0, 104.0] | nbody_system.length
     particles.y = 0 | nbody_system.length
     particles.z = 0 | nbody_system.length
     particles.velocity = [[2, 0, 0], [-2, 0, 0]]*3 + [[-4, 0, 0]] | nbody_system.speed
     
     instance = Huayno()
     instance.parameters.inttype_parameter = inttype_parameter
     instance.particles.add_particles(particles)
     collisions = instance.stopping_conditions.collision_detection
     collisions.enable()
     instance.evolve_model(1.0 | nbody_system.time)
     
     self.assertTrue(collisions.is_set())
     self.assertTrue(instance.model_time < 0.5 | nbody_system.time)
     self.assertEquals(len(collisions.particles(0)), 3)
     self.assertEquals(len(collisions.particles(1)), 3)
     self.assertEquals(len(particles - collisions.particles(0) - collisions.particles(1)), 1)
     self.assertEquals(abs(collisions.particles(0).x - collisions.particles(1).x) <= 
             (collisions.particles(0).radius + collisions.particles(1).radius),
             [True, True, True])
     
     sticky_merged = datamodel.Particles(len(collisions.particles(0)))
     sticky_merged.mass = collisions.particles(0).mass + collisions.particles(1).mass
     sticky_merged.radius = collisions.particles(0).radius
     for p1, p2, merged in zip(collisions.particles(0), collisions.particles(1), sticky_merged):
         merged.position = (p1 + p2).center_of_mass()
         merged.velocity = (p1 + p2).center_of_mass_velocity()
     
     print instance.model_time
     print instance.particles
     instance.particles.remove_particles(collisions.particles(0) + collisions.particles(1))
     instance.particles.add_particles(sticky_merged)
     
     instance.evolve_model(1.0 | nbody_system.time)
     print
     print instance.model_time
     print instance.particles
     self.assertTrue(collisions.is_set())
     self.assertTrue(instance.model_time < 1.0 | nbody_system.time)
     self.assertEquals(len(collisions.particles(0)), 1)
     self.assertEquals(len(collisions.particles(1)), 1)
     self.assertEquals(len(instance.particles - collisions.particles(0) - collisions.particles(1)), 2)
     self.assertEquals(abs(collisions.particles(0).x - collisions.particles(1).x) <= 
             (collisions.particles(0).radius + collisions.particles(1).radius),
             [True])
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def _compare_integrator_with_collision_integrator(self, inttype_parameter1, inttype_parameter2):
     numpy.random.seed(12345)
     particles = plummer.new_plummer_model(101)
     instance = Huayno()
     instance.parameters.inttype_parameter = inttype_parameter1
     instance.particles.add_particles(particles)
     instance.evolve_model(0.2 | nbody_system.time)
     expected_position = instance.particles.position
     expected_velocity = instance.particles.velocity
     instance.reset()
     instance.parameters.inttype_parameter = inttype_parameter2
     instance.particles.add_particles(particles)
     instance.evolve_model(0.2 | nbody_system.time)
     self.assertAlmostRelativeEquals(expected_position, instance.particles.position, 8)
     self.assertAlmostRelativeEquals(expected_velocity, instance.particles.velocity, 8)
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
def orbit_evolve(bodies, time_peri, eta, n_steps=100):
  converter=nbody_system.nbody_to_si(1|units.MSun,1|units.AU)
  
  gravity = Huayno(converter,channel_type="sockets")
  gravity.particles.add_particles(bodies)
  gravity.commit_particles()
  gravity.parameters.timestep_parameter = eta
  
  channel_from_gravity_to_framework = gravity.particles.new_channel_to(bodies)
  
  Etot_init = gravity.kinetic_energy + gravity.potential_energy
  Etot = Etot_init
  
  file_snap = "orbit_ini.hdf5"
  
  t_end = 2.0*abs(time_peri.value_in(units.yr)) | units.yr
  dt = t_end / float(n_steps)
  time = 0.0 | units.yr
  
  while time <= t_end:
    
    gravity.evolve_model(time)
    channel_from_gravity_to_framework.copy()
    bodies.age = time
    
    # checking energy conservation
    Ekin = gravity.kinetic_energy
    Epot = gravity.potential_energy
    Etot = Ekin + Epot
    dE = Etot_init-Etot
    
    # output centerd on the bodies[0] star
    bodies.position -= bodies[0].position
    bodies.velocity -= bodies[0].velocity
    write_set_to_file(bodies, file_snap, "hdf5")
    
    rel_r = (bodies[1].position - bodies[0].position).lengths()
    print " \t\t", time, "\t", dE/Etot_init, rel_r.in_(units.AU)
    time += dt
  
  gravity.stop()
  bodies.position -= bodies[0].position
  bodies.velocity -= bodies[0].velocity
  print bodies
  
  return

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test29(self):
     instance = Huayno()
     instance.parameters.epsilon_squared = 0.0 | nbody_system.length**2
     
     particles = datamodel.Particles(2)
     particles.position = ([0,0,0], [1,0,0] )| nbody_system.length
     particles.velocity = ([-1,0,0], [2,0,0] )| nbody_system.speed
     particles.radius = 0| nbody_system.length
     particles.mass = 0.1| nbody_system.mass
             
     instance.particles.add_particles(particles)
     instance.stopping_conditions.out_of_box_detection.enable()
     instance.parameters.stopping_conditions_out_of_box_size = 2 | nbody_system.length
     instance.parameters.stopping_conditions_out_of_box_use_center_of_mass = False
     instance.evolve_model(1 | nbody_system.time)
     self.assertTrue(instance.stopping_conditions.out_of_box_detection.is_set())
     self.assertEquals(len(instance.stopping_conditions.out_of_box_detection.particles(0)), 1)
     self.assertEquals(instance.stopping_conditions.out_of_box_detection.particles(0)[0].key, particles[1].key)
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test22(self):
     print "Testing zero-mass test particles in Huayno, can be used for removing particles when inside recursive evolve loop"
     sun_and_earth = self.new_system_of_sun_and_earth()
     period = (4.0 * math.pi**2 * (1.0 | units.AU)**3 / (constants.G * sun_and_earth.total_mass())).sqrt()
     convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 1.0 | units.AU)
     huayno = Huayno(convert_nbody)
     huayno.parameters.epsilon_squared = 0.0 | units.AU**2
     huayno.parameters.inttype_parameter = huayno.inttypes.SHARED8
     
     test_particle = datamodel.Particle(mass=0|units.MSun, position=[4,0,0]|units.AU, velocity=[0,0,0]|units.kms)
     test_particle.vy = (constants.G * sun_and_earth.total_mass() / (4.0 | units.AU)).sqrt()
     sun_and_earth.add_particle(test_particle)
     huayno.particles.add_particles(sun_and_earth)
     huayno.evolve_model(period)
     self.assertAlmostRelativeEqual(huayno.particles[:2].x, sun_and_earth[:2].x, 13)
     huayno.evolve_model(1.25 * period)
     self.assertAlmostRelativeEqual(huayno.particles[1].y, sun_and_earth[1].x, 13)
     huayno.evolve_model(8.0 * period)
     self.assertAlmostRelativeEqual(huayno.particles.x, sun_and_earth.x, 8)
     huayno.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test6(self):
     print "Test6: Testing Huayno parameters"
     convert_nbody = nbody_system.nbody_to_si(1.0 | units.yr, 1.0 | units.AU)
     instance = Huayno(convert_nbody)
     
     (value, error) = instance.legacy_interface.get_eps2()
     self.assertEquals(0, error)
     self.assertEquals(0.0, value)
     self.assertAlmostEquals(0.0 | units.AU**2, instance.parameters.epsilon_squared, in_units=units.AU**2)
     for x in [0.01, 0.1, 0.2]:
         instance.parameters.epsilon_squared = x | units.AU**2
         self.assertAlmostEquals(x | units.AU**2, instance.parameters.epsilon_squared, in_units=units.AU**2)
             
     (value, error) = instance.legacy_interface.get_time()
     self.assertEquals(0, error)
     self.assertEquals(0.0, value)
     self.assertAlmostEquals(0.0 | units.yr, instance.parameters.begin_time, in_units=units.yr)
     for x in [1.0, 10.0, 100.0]:
         instance.parameters.begin_time = x | units.yr
         self.assertAlmostEquals(x | units.yr, instance.parameters.begin_time, in_units=units.yr)
     instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
    def test27(self):
        particles = plummer.new_plummer_model(31)

        tend=0.25| nbody_system.time

        instance = Huayno()
        instance.particles.add_particles(particles)        
        instance.evolve_model(tend)
        expected_positions = instance.particles.position
        self.assertEqual(instance.model_time, tend)
        instance.stop()
        
        particles2=particles.copy()
        particles2.velocity*=-1

        instance = Huayno()
        instance.particles.add_particles(particles2)        
        instance.evolve_model(-tend)
        positions = instance.particles.position
        self.assertEqual(instance.model_time, -tend)
        instance.stop()

        self.assertAlmostEqual(positions,expected_positions)

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
 def test15(self):
     particles = plummer.new_plummer_model(512)
     expected_positions = None
     for mode in ["cpu", "openmp", "opencl"]:
         try:
             instance = Huayno(mode=mode, number_of_workers=1)#, debugger="xterm")
         except:
             print "Running huayno with mode=", mode, " was unsuccessful."
             continue
         else:
             print "Running huayno with mode=", mode, "... "
             
         instance.initialize_code()
         instance.parameters.epsilon_squared = 0.01 | nbody_system.length ** 2
         instance.particles.add_particles(particles)
         
         instance.evolve_model(0.2 | nbody_system.time)
         instance.synchronize_model()
         if expected_positions is None:
             expected_positions = instance.particles.position
         else:
             self.assertAlmostRelativeEquals(expected_positions, instance.particles.position, 8)
         instance.stop()

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
    def test7(self):
        print "Test7: Testing effect of Huayno parameter epsilon_squared"
        convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 1.0 | units.AU)
        
        particles = datamodel.Particles(2)
        sun = particles[0]
        sun.mass = 1.0 | units.MSun
        sun.position = [0.0, 0.0, 0.0] | units.AU
        sun.velocity = [0.0, 0.0, 0.0] | units.AU / units.yr
        sun.radius = 1.0 | units.RSun

        earth = particles[1]
        earth.mass = 5.9736e24 | units.kg
        earth.radius = 6371.0 | units.km
        earth.position = [0.0, 1.0, 0.0] | units.AU
        earth.velocity = [2.0*numpy.pi, -0.0001, 0.0] | units.AU / units.yr
        
        initial_direction = math.atan((earth.velocity[0]/earth.velocity[1]))
        final_direction = []
        for log_eps2 in range(-9,10,2):
            instance = Huayno(convert_nbody)
            instance.initialize_code()
            instance.parameters.epsilon_squared = 10.0**log_eps2 | units.AU ** 2
            instance.particles.add_particles(particles)
            instance.commit_particles()
            instance.evolve_model(0.25 | units.yr)
            final_direction.append(math.atan((instance.particles[1].velocity[0]/
                instance.particles[1].velocity[1])))
            instance.stop()
        # Small values of epsilon_squared should result in normal earth-sun dynamics: rotation of 90 degrees
        self.assertAlmostEquals(abs(final_direction[0]), abs(initial_direction+math.pi/2.0), 2)
        # Large values of epsilon_squared should result in ~ no interaction
        self.assertAlmostEquals(final_direction[-1], initial_direction, 2)
        # Outcome is most sensitive to epsilon_squared when epsilon_squared = d(earth, sun)^2
        delta = [abs(final_direction[i+1]-final_direction[i]) for i in range(len(final_direction)-1)]
        self.assertEquals(delta[len(final_direction)/2 -1], max(delta))

# 需要导入模块: from amuse.community.huayno.interface import Huayno [as 别名]
# 或者: from amuse.community.huayno.interface.Huayno import stop [as 别名]
def test_run():        
    three=binary_with_planet(
      m1=0.6897 | units.MSun,m2=0.20255 | units.MSun,m_planet=0.333 | units.MJupiter,
      r1=0.6489 | units.RSun,r2=0.22623 | units.RSun,r_planet=0.754 | units.RJupiter,
      ecc_binary=0.15944,P_binary=41.08| units.day,ecc_planet=0.00685,a_planet=.7048 | units.AU,
      pangle_planet=0.) 

    convert=nbody_system.nbody_to_si(1|units.MSun,1|units.AU)
    code=Huayno(convert)
    
    code.parameters.inttype_parameter=code.inttypes.SHARED4
    code.parameters.timestep_parameter=0.1
    
#    tend=100. | units.yr
    tend=100. | units.day
    snapfreq=1
    
    dt=10. | units.day
#    dt=convert.to_si( 1. | nbody_system.time).in_(units.day)
    
    code.particles.add_particles(three)

    x = AdaptingVectorQuantity()
    y = AdaptingVectorQuantity()
    z = AdaptingVectorQuantity()
    vx = AdaptingVectorQuantity()
    vy = AdaptingVectorQuantity()
    vz = AdaptingVectorQuantity()
    x.append(code.particles.x)
    y.append(code.particles.y)
    z.append(code.particles.z)
    vx.append(code.particles.vx)
    vy.append(code.particles.vy)
    vz.append(code.particles.vz)
    ts=[0.]
    E0=code.potential_energy+code.kinetic_energy    
    dE=[1.e-14]
    t=0. | units.day
    i=0
    while(t < tend-dt/2):
        i+=1
        t=t+dt
        if i%snapfreq==0:
          print t
          ts.append(t.value_in(units.day))
          code.evolve_model(t)
          x.append(code.particles.x)
          y.append(code.particles.y)
          z.append(code.particles.z)
          vx.append(code.particles.vx)
          vy.append(code.particles.vy)
          vz.append(code.particles.vz)
          E=code.potential_energy+code.kinetic_energy    
          dE.append(abs(((E-E0)/E0)))
    code.stop()

    a,eps,pangle=elements(three.total_mass(),
    x[:,2],
    y[:,2],
    z[:,2],
    vx[:,2],
    vy[:,2],
    vz[:,2])

    x=x.value_in(units.AU)
    y=y.value_in(units.AU)
    
    a=a.value_in(units.AU)
    eps=eps
    
    print a[-1],eps[-1],pangle[-1]

    f=pyplot.figure(figsize=(8,8))
    pyplot.plot(x[:,0],y[:,0],'r.')
    pyplot.plot(x[:,1],y[:,1],'g.')
    pyplot.plot(x[:,2],y[:,2],'b.')
    pyplot.xlim(-3,3)
    pyplot.ylim(-3,3)
    pyplot.xlabel('AU')
    pyplot.savefig('three_16b.eps')

    f=pyplot.figure(figsize=(8,8))
    pyplot.semilogy(ts,dE,'g.')
    pyplot.xlabel('time (day)')
    pyplot.ylabel('dE/E0')
    pyplot.savefig('three_16b_eerr.eps')

    f=pyplot.figure(figsize=(8,8))
    pyplot.plot(ts,a,'g.')
    pyplot.xlabel('time (day)')
    pyplot.ylabel('a (AU)')
    pyplot.savefig('three_16b_a.eps')

    f=pyplot.figure(figsize=(8,8))
    pyplot.plot(ts,eps,'g.')
    pyplot.xlabel('time (day)')
    pyplot.ylabel('eccentricity')
    pyplot.savefig('three_16b_ecc.eps')

    f=pyplot.figure(figsize=(8,8))
#.........这里部分代码省略.........