Update.

[picoclvr.git] / expr.py

diff --git a/expr.py b/expr.py
new file mode 100755 (executable)
index 0000000..8a89945
--- /dev/null
+++ b/expr.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+import math
+
+import torch, torchvision
+
+from torch import nn
+from torch.nn import functional as F
+
+def random_var(nb_variables=None, variables=None):
+    if variables is None:
+        return chr(ord('A') + torch.randint(nb_variables, (1,)).item())
+    else:
+        l = list(variables)
+        return l[torch.randint(len(l), (1,)).item()]
+
+def random_expr(variables, budget):
+    if budget <= 5:
+        op=torch.randint(2, (1,)).item()
+        if op == 0 and len(variables) > 0:
+            return random_var(variables=variables)
+        else:
+            return str(torch.randint(10, (1,)).item())
+    else:
+        op=torch.randint(4, (1,)).item()
+        if op == 0:
+            e=random_expr(variables,budget-2)
+            if ("+" in e or "-" in e or "*" in e) and (e[0]!="(" or e[-1]!=")"):
+                return "("+e+")"
+            else:
+                return e
+        else:
+            b = 2 + torch.randint(budget-5, (1,)).item()
+            e1=random_expr(variables,b)
+            e2=random_expr(variables,budget-b-1)
+            if op == 1:
+                return e1+"+"+e2
+            elif op == 2:
+                return e1+"+"+e2
+            elif op == 3:
+                return e1+"*"+e2
+
+def generate_program(nb_variables, length):
+    s = ""
+    variables = set()
+    while len(s) < length:
+        v = random_var(nb_variables=nb_variables)
+        s += v+"="+random_expr(variables,budget = min(20,length-3-len(s)))+";"
+        variables.add(v)
+    return s, variables
+
+def generate_sequences(nb, nb_variables = 5, length=20):
+    sequences=[]
+    for n in range(nb):
+        result = None
+        while result==None or max(result.values())>100:
+            p,v=generate_program(nb_variables, length)
+            v=", ".join([ "\""+v+"\": "+v for v in v ])
+            ldict={}
+            exec(p+"result={"+v+"}",globals(),ldict)
+            result=ldict["result"]
+
+        k=list(result.keys())
+        k.sort()
+        sequences.append(p+" "+";".join([v+":"+str(result[v]) for v in k]))
+
+    return sequences
+
+if __name__ == "__main__":
+    import time
+    start_time = time.perf_counter()
+    sequences=generate_sequences(1000)
+    end_time = time.perf_counter()
+    for s in sequences[:10]:
+        print(s)
+    print(f"{len(sequences) / (end_time - start_time):.02f} samples per second")
+