diff --git a/bindings/python/sample.py b/bindings/python/sample.py
index 6d09ff5d84dd9c9b2633d7faa33140c5aedf91fc..7a22b2a28c02b259baa21fb327051d7efd40d556 100755
--- a/bindings/python/sample.py
+++ b/bindings/python/sample.py
@@ -14,46 +14,46 @@ def test_ks(arch, mode, code, syntax=0):
 
     encoding, count = ks.asm(code)
 
-    print("%s = [ " %code, end='')
+    print("%s = [ " % code, end='')
     for i in encoding:
-        print("%02x " %i, end='')
+        print("%02x " % i, end='')
     print("]")
 
 
 if __name__ == '__main__':
     # X86
-    test_ks(KS_ARCH_X86, KS_MODE_16, "add eax, ecx")
-    test_ks(KS_ARCH_X86, KS_MODE_32, "add eax, ecx")
-    test_ks(KS_ARCH_X86, KS_MODE_64, "add rax, rcx")
-    test_ks(KS_ARCH_X86, KS_MODE_32, "add %ecx, %eax", KS_OPT_SYNTAX_ATT)
-    test_ks(KS_ARCH_X86, KS_MODE_64, "add %rcx, %rax", KS_OPT_SYNTAX_ATT)
+    test_ks(KS_ARCH_X86, KS_MODE_16, b"add eax, ecx")
+    test_ks(KS_ARCH_X86, KS_MODE_32, b"add eax, ecx")
+    test_ks(KS_ARCH_X86, KS_MODE_64, b"add rax, rcx")
+    test_ks(KS_ARCH_X86, KS_MODE_32, b"add %ecx, %eax", KS_OPT_SYNTAX_ATT)
+    test_ks(KS_ARCH_X86, KS_MODE_64, b"add %rcx, %rax", KS_OPT_SYNTAX_ATT)
 
     # ARM
-    test_ks(KS_ARCH_ARM, KS_MODE_ARM, "sub r1, r2, r5")
-    test_ks(KS_ARCH_ARM, KS_MODE_ARM + KS_MODE_BIG_ENDIAN, "sub r1, r2, r5")
-    test_ks(KS_ARCH_ARM, KS_MODE_THUMB, "movs r4, #0xf0")
-    test_ks(KS_ARCH_ARM, KS_MODE_THUMB + KS_MODE_BIG_ENDIAN, "movs r4, #0xf0")
+    test_ks(KS_ARCH_ARM, KS_MODE_ARM, b"sub r1, r2, r5")
+    test_ks(KS_ARCH_ARM, KS_MODE_ARM + KS_MODE_BIG_ENDIAN, b"sub r1, r2, r5")
+    test_ks(KS_ARCH_ARM, KS_MODE_THUMB, b"movs r4, #0xf0")
+    test_ks(KS_ARCH_ARM, KS_MODE_THUMB + KS_MODE_BIG_ENDIAN, b"movs r4, #0xf0")
 
     # ARM64
-    test_ks(KS_ARCH_ARM64, KS_MODE_BIG_ENDIAN, "ldr w1, [sp, #0x8]")
+    test_ks(KS_ARCH_ARM64, KS_MODE_BIG_ENDIAN, b"ldr w1, [sp, #0x8]")
 
     # Hexagon
-    test_ks(KS_ARCH_HEXAGON, KS_MODE_BIG_ENDIAN, "v23.w=vavg(v11.w,v2.w):rnd")
+    test_ks(KS_ARCH_HEXAGON, KS_MODE_BIG_ENDIAN, b"v23.w=vavg(v11.w,v2.w):rnd")
 
     # Mips
-    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS32, "and $9, $6, $7")
-    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS32 + KS_MODE_BIG_ENDIAN, "and $9, $6, $7")
-    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS64, "and $9, $6, $7")
-    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS64 + KS_MODE_BIG_ENDIAN, "and $9, $6, $7")
+    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS32, b"and $9, $6, $7")
+    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS32 + KS_MODE_BIG_ENDIAN, b"and $9, $6, $7")
+    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS64, b"and $9, $6, $7")
+    test_ks(KS_ARCH_MIPS, KS_MODE_MIPS64 + KS_MODE_BIG_ENDIAN, b"and $9, $6, $7")
 
     # PowerPC
-    test_ks(KS_ARCH_PPC, KS_MODE_PPC32 + KS_MODE_BIG_ENDIAN, "add 1, 2, 3")
-    test_ks(KS_ARCH_PPC, KS_MODE_PPC64, "add 1, 2, 3")
-    test_ks(KS_ARCH_PPC, KS_MODE_PPC64 + KS_MODE_BIG_ENDIAN, "add 1, 2, 3")
+    test_ks(KS_ARCH_PPC, KS_MODE_PPC32 + KS_MODE_BIG_ENDIAN, b"add 1, 2, 3")
+    test_ks(KS_ARCH_PPC, KS_MODE_PPC64, b"add 1, 2, 3")
+    test_ks(KS_ARCH_PPC, KS_MODE_PPC64 + KS_MODE_BIG_ENDIAN, b"add 1, 2, 3")
 
     # Sparc
-    test_ks(KS_ARCH_SPARC, KS_MODE_SPARC32 + KS_MODE_LITTLE_ENDIAN, "add %g1, %g2, %g3")
-    test_ks(KS_ARCH_SPARC, KS_MODE_SPARC32 + KS_MODE_BIG_ENDIAN, "add %g1, %g2, %g3")
+    test_ks(KS_ARCH_SPARC, KS_MODE_SPARC32 + KS_MODE_LITTLE_ENDIAN, b"add %g1, %g2, %g3")
+    test_ks(KS_ARCH_SPARC, KS_MODE_SPARC32 + KS_MODE_BIG_ENDIAN, b"add %g1, %g2, %g3")
 
     # SystemZ
-    test_ks(KS_ARCH_SYSTEMZ, KS_MODE_BIG_ENDIAN, "a %r0, 4095(%r15,%r1)")
+    test_ks(KS_ARCH_SYSTEMZ, KS_MODE_BIG_ENDIAN, b"a %r0, 4095(%r15,%r1)")