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Commit 7c96789c authored by Steven Cordwell's avatar Steven Cordwell
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Use a single verbose printing function 

Improve the consitency across classes when verbose mode is on by using a
single function that does proper formatting.
parent b70f9ebb
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src/mdptoolbox/mdp.py
View file @ 7c96789c
......@@ -84,6 +84,15 @@ def _computeDimensions(transition):
return S, A
def _printVerbosity(iteration, variation):
if isinstance(variation, float):
print("{:>10}{:>12f}".format(iteration, variation))
elif isinstance(variation, int):
print("{:>10}{:>12d}".format(iteration, variation))
else:
print("{:>10}{:>12}".format(iteration, variation))
class MDP(object):
"""A Markov Decision Problem.
......@@ -316,8 +325,26 @@ class MDP(object):
else:
return _np.multiply(transition, reward).sum(1).reshape(self.S)
def _startRun(self):
if self.verbose:
_printVerbosity('Iteration', 'Variation')
self.time = _time.time()
def _endRun(self):
# store value and policy as tuples
self.V = tuple(self.V.tolist())
try:
self.policy = tuple(self.policy.tolist())
except AttributeError:
self.policy = tuple(self.policy)
self.time = _time.time() - self.time
def run(self):
# Raise error because child classes should implement this function.
"""Raises error because child classes should implement this function.
"""
raise NotImplementedError("You should create a run() method.")
def setSilent(self):
......@@ -720,7 +747,7 @@ class PolicyIteration(MDP):
policy_P, policy_R = self._computePpolicyPRpolicy()
if self.verbose:
print(' Iteration\t\t V variation')
_printVerbosity("Iteration", "V variation")
itr = 0
done = False
......@@ -732,7 +759,7 @@ class PolicyIteration(MDP):
variation = _np.absolute(policy_V - Vprev).max()
if self.verbose:
print((' %s\t\t %s') % (itr, variation))
_printVerbosity(itr, variation)
# ensure |Vn - Vpolicy| < epsilon
if variation < ((1 - self.discount) / self.discount) * epsilon:
......@@ -773,14 +800,9 @@ class PolicyIteration(MDP):
def run(self):
# Run the policy iteration algorithm.
# If verbose the print a header
if self.verbose:
print(' Iteration\t\tNumber of different actions')
# Set up the while stopping condition and the current time
done = False
self.time = _time.time()
# loop until a stopping condition is reached
while not done:
self._startRun()
while True:
self.iter += 1
# these _evalPolicy* functions will update the classes value
# attribute
......@@ -797,24 +819,21 @@ class PolicyIteration(MDP):
n_different = (policy_next != self.policy).sum()
# if verbose then continue printing a table
if self.verbose:
print((' %s\t\t %s') % (self.iter, n_different))
_printVerbosity(self.iter, n_different)
# Once the policy is unchanging of the maximum number of
# of iterations has been reached then stop
if n_different == 0:
done = True
if self.verbose:
print(_MSG_STOP_UNCHANGING_POLICY)
break
elif self.iter == self.max_iter:
done = True
if self.verbose:
print(_MSG_STOP_MAX_ITER)
break
else:
self.policy = policy_next
# update the time to return th computation time
self.time = _time.time() - self.time
# store value and policy as tuples
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy.tolist())
self._endRun()
class PolicyIterationModified(PolicyIteration):
......@@ -901,13 +920,9 @@ class PolicyIterationModified(PolicyIteration):
def run(self):
# Run the modified policy iteration algorithm.
if self.verbose:
print(' \tIteration\t\tV-variation')
self.time = _time.time()
self._startRun()
done = False
while not done:
while True:
self.iter += 1
self.policy, Vnext = self._bellmanOperator()
......@@ -915,11 +930,11 @@ class PolicyIterationModified(PolicyIteration):
variation = _util.getSpan(Vnext - self.V)
if self.verbose:
print((" %s\t\t %s" % (self.iter, variation)))
_printVerbosity(self.iter, variation)
self.V = Vnext
if variation < self.thresh:
done = True
break
else:
is_verbose = False
if self.verbose:
......@@ -931,11 +946,7 @@ class PolicyIterationModified(PolicyIteration):
if is_verbose:
self.setVerbose()
self.time = _time.time() - self.time
# store value and policy as tuples
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy.tolist())
self._endRun()
class QLearning(MDP):
......@@ -1098,11 +1109,7 @@ class QLearning(MDP):
self.V = self.Q.max(axis=1)
self.policy = self.Q.argmax(axis=1)
self.time = _time.time() - self.time
# convert V and policy to tuples
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy.tolist())
self._endRun()
class RelativeValueIteration(MDP):
......@@ -1192,13 +1199,9 @@ class RelativeValueIteration(MDP):
def run(self):
# Run the relative value iteration algorithm.
done = False
if self.verbose:
print(' Iteration\t\tU variation')
self._startRun()
self.time = _time.time()
while not done:
while True:
self.iter += 1
......@@ -1208,27 +1211,23 @@ class RelativeValueIteration(MDP):
variation = _util.getSpan(Vnext - self.V)
if self.verbose:
print((" %s\t\t %s" % (self.iter, variation)))
_printVerbosity(self.iter, variation)
if variation < self.epsilon:
done = True
self.average_reward = self.gain + (Vnext - self.V).min()
if self.verbose:
print(_MSG_STOP_EPSILON_OPTIMAL_POLICY)
break
elif self.iter == self.max_iter:
done = True
self.average_reward = self.gain + (Vnext - self.V).min()
if self.verbose:
print(_MSG_STOP_MAX_ITER)
break
self.V = Vnext
self.gain = float(self.V[self.S - 1])
self.time = _time.time() - self.time
# store value and policy as tuples
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy.tolist())
self._endRun()
class ValueIteration(MDP):
......@@ -1421,11 +1420,8 @@ class ValueIteration(MDP):
def run(self):
# Run the value iteration algorithm.
self._startRun()
if self.verbose:
print(' Iteration\t\tV-variation')
self.time = _time.time()
while True:
self.iter += 1
......@@ -1440,7 +1436,7 @@ class ValueIteration(MDP):
variation = _util.getSpan(self.V - Vprev)
if self.verbose:
print((" %s\t\t %s" % (self.iter, variation)))
_printVerbosity(self.iter, variation)
if variation < self.thresh:
if self.verbose:
......@@ -1451,11 +1447,7 @@ class ValueIteration(MDP):
print(_MSG_STOP_MAX_ITER)
break
# store value and policy as tuples
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy.tolist())
self.time = _time.time() - self.time
self._endRun()
class ValueIterationGS(ValueIteration):
......@@ -1551,14 +1543,9 @@ class ValueIterationGS(ValueIteration):
def run(self):
# Run the value iteration Gauss-Seidel algorithm.
done = False
if self.verbose:
print(' Iteration\t\tV-variation')
self.time = _time.time()
self._startRun()
while not done:
while True:
self.iter += 1
Vprev = self.V.copy()
......@@ -1573,16 +1560,16 @@ class ValueIterationGS(ValueIteration):
variation = _util.getSpan(self.V - Vprev)
if self.verbose:
print((" %s\t\t %s" % (self.iter, variation)))
_printVerbosity(self.iter, variation)
if variation < self.thresh:
done = True
if self.verbose:
print(_MSG_STOP_EPSILON_OPTIMAL_POLICY)
break
elif self.iter == self.max_iter:
done = True
if self.verbose:
print(_MSG_STOP_MAX_ITER)
break
self.policy = []
for s in range(self.S):
......@@ -1594,7 +1581,4 @@ class ValueIterationGS(ValueIteration):
self.V[s] = Q.max()
self.policy.append(int(Q.argmax()))
self.time = _time.time() - self.time
self.V = tuple(self.V.tolist())
self.policy = tuple(self.policy)
self._endRun()
src/tests/test_MDP.py
View file @ 7c96789c
......@@ -8,10 +8,30 @@ Created on Sat Aug 24 14:18:51 2013
import numpy as np
import scipy.sparse as sp
import mdptoolbox, mdptoolbox.example
import mdptoolbox.example
from .utils import SMALLNUM, P_small, R_small
class TestUnitsMDP(object):
def test_MDP_has_startRun_method(self):
P, R = mdptoolbox.example.small()
sdp = mdptoolbox.mdp.MDP(P, R, None, None, None)
sdp._startRun()
assert sdp.time is not None
def test_MDP_has_endRun_method(self):
P, R = mdptoolbox.example.small()
sdp = mdptoolbox.mdp.MDP(P, R, None, None, None)
sdp._startRun()
sdp.V = np.zeros(1) # to prevent AttributeError in sdp._endRun()
sdp.policy = np.zeros(1) # to prevent AttributeError in sdp._endRun()
time = sdp.time
sdp._endRun()
assert time != sdp.time
class TestMDP(object):
P = (((0.0, 0.0, 0.6, 0.4, 0.0),
(0.0, 0.0, 0.0, 0.0, 1.0),
......@@ -90,6 +110,7 @@ class TestMDP(object):
assert (sdp.R[0] == np.array(self.computed_R[0])).all()
assert (sdp.R[1] == np.array(self.computed_R[1])).all()
def test_MDP_P_R_1():
P1 = []
P1.append(np.array(np.matrix('0.5 0.5; 0.8 0.2')))
......@@ -106,6 +127,7 @@ def test_MDP_P_R_1():
assert (a.P[kk] == P1[kk]).all()
assert (a.R[kk] == R1[kk]).all()
def test_MDP_P_R_2():
R = np.array([[[5, 10], [-1, 2]], [[1, 2], [3, 4]]])
P1 = []
......@@ -123,8 +145,9 @@ def test_MDP_P_R_2():
assert (a.P[kk] == P1[kk]).all()
assert (np.absolute(a.R[kk] - R1[kk]) < SMALLNUM).all()
def test_MDP_P_R_3():
P = np.array([[[0.6116, 0.3884],[0, 1]],[[0.6674, 0.3326],[0, 1]]])
P = np.array([[[0.6116, 0.3884], [0, 1]], [[0.6674, 0.3326], [0, 1]]])
R = np.array([[[-0.2433, 0.7073],[0, 0.1871]],[[-0.0069, 0.6433],[0, 0.2898]]])
PR = []
PR.append(np.array(np.matrix('0.12591304, 0.1871')))
......
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