test/gen_access_pattern: cleanup.

test/gen_access_pattern.py

@@ -1,26 +1,27 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import random
 import argparse
 
 def main():
-    desc = """
-    Generate random access pattern.
-    Each address in range [base, base+length) will be accessed only once,
-    but in random order. This ensures that no data will be overwritten.
+    description = """
+    Generate random access pattern for LiteDRAM Pattern Generator/Checker.
+
+    Each address in range [base, base+length) will be accessed only once, but in random order.
+    This ensures that no data will be overwritten.
     """
-    parser = argparse.ArgumentParser(description=desc)
-    parser.add_argument('base',       help='Base address')
-    parser.add_argument('length',     help='Number of (address, data) pairs')
-    parser.add_argument('data_width', help='Width of data (used to determine max value)')
-    parser.add_argument('--seed',     help='Use given random seed (int)')
+    parser = argparse.ArgumentParser(description=description)
+    parser.add_argument("base",       help="Base address")
+    parser.add_argument("length",     help="Number of (address, data) pairs")
+    parser.add_argument("data_width", help="Width of data (used to determine max value)")
+    parser.add_argument("--seed",     help="Use given random seed (int)")
     args = parser.parse_args()
 
     if args.seed:
         random.seed(int(args.seed, 0))
 
-    base = int(args.base, 0)
-    length = int(args.length, 0)
+    base       = int(args.base, 0)
+    length     = int(args.length, 0)
     data_width = int(args.data_width, 0)
 
     address = list(range(length))
@@ -28,7 +29,7 @@ def main():
     data = [random.randrange(0, 2**data_width) for _ in range(length)]
 
     for a, d in zip(address, data):
-        print('0x{:08x},0x{:08x}'.format(a, d))
+        print("0x{:08x}, 0x{:08x}".format(a, d))
 
 if __name__ == "__main__":
     main()