Start project (halp)

1 files changed, 76 insertions, 0 deletions

diff --git a/csci1913/Python/project1_strap012.py b/csci1913/Python/project1_strap012.py
new file mode 100644
index 0000000..af39315
--- /dev/null
+++ b/csci1913/Python/project1_strap012.py
@@ -0,0 +1,76 @@
+class Random:    
+    def __init__(self, seed):
+        self.sevenFive = 16807
+        self.twoThirtyone = 2147483647
+        self.newNum = seed
+    def next(self):
+        self.newNum = self.sevenFive*self.newNum % self.twoThirtyone
+        return self.newNum
+    def choose(self, limit):
+        return next()%limit
+
+class Rule:
+    def __init__(self, left, right):
+        self.left = left
+        self.right = right
+        self.count = 1
+    def __repr__(self):
+        string = str(self.count)
+        string += " "
+        string += str(self.left)
+        string += " -> "
+        for n in range (0, len(self.right)):
+            string += self.right[n]
+            string += " "
+        return string
+
+def filter(D, E):
+    if len(D) is 0:
+        return False
+    elif D[1] is E:
+        return True
+    else:
+        return filter(D[1:],E)
+
+class Grammar:
+    def __init__(self, seed):
+        self.r = Random(seed)
+        self.dictionary = {}
+    def rule(self, left, right):
+        if left in self.dictionary:
+            self.dictionary[left]+=(Rule(left,right),)
+        else:
+            self.dictionary[left]=(Rule(left, right),)
+    def generate(self):
+        if 'Start' in self.dictionary:
+            self.generating(self.dictionary['Start'])
+        else:
+            raise RuntimeError
+    def generating(self,strings):
+        result=''
+        for n in range (0, len(strings)):
+            if strings[n] in self.dictionary:
+                result += select(strings[n])
+            else:
+                result += strings[n]
+                result += " "
+        return result
+    def select(self, left):
+        rules=self.dictionary[left]
+        index=self.r.choose(len(left))
+
+
+
+G = Grammar(101)
+G.rule('Noun',   ('cat',))  # 01
+G.rule('Noun',   ('boy',))  # 02
+G.rule('Noun',   ('dog',))  # 03
+G.rule('Noun',   ('girl',))  # 04
+G.rule('Verb',   ('bit',))  # 05
+G.rule('Verb',   ('chased',))  # 06
+G.rule('Verb',   ('kissed',))  # 07
+G.rule('Phrase', ('the', 'Noun', 'Verb', 'the', 'Noun'))  # 08
+G.rule('Story',  ('Phrase',))  # 09
+G.rule('Story',  ('Phrase', 'and', 'Story'))  # 10
+G.rule('Story',  ('Phrase', 'but', 'Story'))  # 11
+G.rule('Start',  ('Story', '.'))  # 12