Fixed issue with printing production probabilities: all were being reduced to…

Fixed issue with printing production probabilities: all were being reduced to one significant digit; documentation wrongly specified 1.0 to display as 1.

nltk/grammar.py

@@ -399,7 +399,7 @@ class ProbabilisticProduction(Production, ImmutableProbabilisticMixIn):
 
     def __str__(self):
         return Production.__unicode__(self) + \
-            (' [1.0]' if (self.prob() == 1.0) else ' [%.g]' % self.prob())
+            (' [1.0]' if (self.prob() == 1.0) else ' [%g]' % self.prob())
 
     def __eq__(self, other):
         return (type(self) == type(other) and

nltk/test/parse.doctest

@@ -556,7 +556,7 @@ Create a set of PCFG productions.
     A
 
     >>> grammar.productions()
-    [A -> B B [0.3], A -> C B C [0.7], B -> B D [0.5], B -> C [0.5], C -> 'a' [0.1], C -> 'b' [0.9], D -> 'b' [1]]
+    [A -> B B [0.3], A -> C B C [0.7], B -> B D [0.5], B -> C [0.5], C -> 'a' [0.1], C -> 'b' [0.9], D -> 'b' [1.0]]
 
 Induce some productions using parsed Treebank data.
 
@@ -570,7 +570,7 @@ Induce some productions using parsed Treebank data.
     <Grammar with 71 productions>
 
     >>> sorted(grammar.productions(lhs=Nonterminal('PP')))[:2]
-    [PP -> IN NP [1]]
+    [PP -> IN NP [1.0]]
     >>> sorted(grammar.productions(lhs=Nonterminal('NNP')))[:2]
     [NNP -> 'Agnew' [0.0714286], NNP -> 'Consolidated' [0.0714286]]
     >>> sorted(grammar.productions(lhs=Nonterminal('JJ')))[:2]
@@ -585,14 +585,14 @@ Unit tests for the Probabilistic Chart Parse classes
     >>> grammar = toy_pcfg2
     >>> print(grammar)
     Grammar with 23 productions (start state = S)
-        S -> NP VP [1]
+        S -> NP VP [1.0]
         VP -> V NP [0.59]
         VP -> V [0.4]
         VP -> VP PP [0.01]
         NP -> Det N [0.41]
         NP -> Name [0.28]
         NP -> NP PP [0.31]
-        PP -> P NP [1]
+        PP -> P NP [1.0]
         V -> 'saw' [0.21]
         V -> 'ate' [0.51]
         V -> 'ran' [0.28]