# Generated Code

The following is python code generated by the CellML API from this CellML file. (Back to language selection)

The raw code is available.

```# Size of variable arrays:
sizeAlgebraic = 4
sizeStates = 1
sizeConstants = 5
from math import *
from numpy import *

def createLegends():
legend_states = [""] * sizeStates
legend_rates = [""] * sizeStates
legend_algebraic = [""] * sizeAlgebraic
legend_voi = ""
legend_constants = [""] * sizeConstants
legend_voi = "time in component environment (second)"
legend_constants = "a in component contraction (mNpermmsq)"
legend_constants = "b in component contraction (pms)"
legend_constants = "Po in component contraction (mNpermmsq)"
legend_constants = "alpha in component contraction (mNpermmsq)"
legend_constants = "L_se_o in component contraction (dimensionless)"
legend_algebraic = "L in component contraction (dimensionless)"
legend_algebraic = "v in component contraction (pms)"
legend_algebraic = "L_se in component contraction (dimensionless)"
legend_states = "L_ce in component contraction (dimensionless)"
legend_algebraic = "P in component contraction (mNpermmsq)"
legend_rates = "d/dt L_ce in component contraction (dimensionless)"
return (legend_states, legend_algebraic, legend_voi, legend_constants)

def initConsts():
constants = [0.0] * sizeConstants; states = [0.0] * sizeStates;
constants = 37.24
constants = 0.325
constants = 144.9
constants = 1449.027
constants = 0.3
states = 0.7
return (states, constants)

def computeRates(voi, states, constants):
rates = [0.0] * sizeStates; algebraic = [0.0] * sizeAlgebraic
algebraic = custom_piecewise([less_equal(voi , 1.00000), 1.00000 , greater(voi , 1.00000) & less(voi , 5.00000), 0.920000 , True, 0.900000])
algebraic = algebraic-states
algebraic = constants*(algebraic-constants)
algebraic = (-constants*(constants-algebraic))/(algebraic+constants)
rates = algebraic
return(rates)

def computeAlgebraic(constants, states, voi):
algebraic = array([[0.0] * len(voi)] * sizeAlgebraic)
states = array(states)
voi = array(voi)
algebraic = custom_piecewise([less_equal(voi , 1.00000), 1.00000 , greater(voi , 1.00000) & less(voi , 5.00000), 0.920000 , True, 0.900000])
algebraic = algebraic-states
algebraic = constants*(algebraic-constants)
algebraic = (-constants*(constants-algebraic))/(algebraic+constants)
return algebraic

def custom_piecewise(cases):
"""Compute result of a piecewise function"""
return select(cases[0::2],cases[1::2])

def solve_model():
"""Solve model with ODE solver"""
from scipy.integrate import ode
# Initialise constants and state variables
(init_states, constants) = initConsts()

# Set timespan to solve over
voi = linspace(0, 10, 500)

# Construct ODE object to solve
r = ode(computeRates)
r.set_integrator('vode', method='bdf', atol=1e-06, rtol=1e-06, max_step=1)
r.set_initial_value(init_states, voi)
r.set_f_params(constants)

# Solve model
states = array([[0.0] * len(voi)] * sizeStates)
states[:,0] = init_states
for (i,t) in enumerate(voi[1:]):
if r.successful():
r.integrate(t)
states[:,i+1] = r.y
else:
break

# Compute algebraic variables
algebraic = computeAlgebraic(constants, states, voi)
return (voi, states, algebraic)

def plot_model(voi, states, algebraic):
"""Plot variables against variable of integration"""
import pylab
(legend_states, legend_algebraic, legend_voi, legend_constants) = createLegends()
pylab.figure(1)
pylab.plot(voi,vstack((states,algebraic)).T)
pylab.xlabel(legend_voi)
pylab.legend(legend_states + legend_algebraic, loc='best')
pylab.show()

if __name__ == "__main__":
(voi, states, algebraic) = solve_model()
plot_model(voi, states, algebraic)
```
Source
Derived from workspace Holmes 2006 at changeset 43e456c10f5e.
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