diff --git a/docs/features/ternary.md b/docs/features/ternary.md
deleted file mode 100644
index 1b4f0690..00000000
--- a/docs/features/ternary.md
+++ /dev/null
@@ -1,30 +0,0 @@
----
-icon: dot
----
-
-# ternary op
-
-Ternary operator is a short hand `if...else`.
-pkpy supports both c and python style ternary.
-
-
-## Syntax
-
-```
-<condition> ? <true_expr> : <false_expr>
-```
-
-```
-<true_expr> if <condition> else <false_expr>
-```
-
-## Example
-
-```python
-a = 1
-s = a == 1 ? "a is 1" : "a is not 1"
-print(s)    # a is 1
-
-# which equals to
-s = "a is 1" if a == 1 else "a is not 1"
-```
\ No newline at end of file
diff --git a/python/builtins.py b/python/builtins.py
index 2ed0b17a..3435ea36 100644
--- a/python/builtins.py
+++ b/python/builtins.py
@@ -5,20 +5,20 @@ def print(*args, sep=' ', end='\n'):
 def round(x, ndigits=0):
     assert ndigits >= 0
     if ndigits == 0:
-        return x >= 0 ? int(x + 0.5) : int(x - 0.5)
+        return int(x + 0.5) if x >= 0 else int(x - 0.5)
     if x >= 0:
         return int(x * 10**ndigits + 0.5) / 10**ndigits
     else:
         return int(x * 10**ndigits - 0.5) / 10**ndigits
 
 def abs(x):
-    return x < 0 ? -x : x
+    return -x if x < 0 else x
 
 def max(a, b):
-    return a > b ? a : b
+    return a if a > b else b
 
 def min(a, b):
-    return a < b ? a : b
+    return a if a < b else b
 
 def all(iterable):
     for i in iterable:
diff --git a/src/compiler.h b/src/compiler.h
index bc732eb2..e6c906da 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -104,7 +104,6 @@ class Compiler {
         rules[TK("&")] =        { nullptr,               METHOD(exprBinaryOp),       PREC_BITWISE_AND };
         rules[TK("|")] =        { nullptr,               METHOD(exprBinaryOp),       PREC_BITWISE_OR };
         rules[TK("^")] =        { nullptr,               METHOD(exprBinaryOp),       PREC_BITWISE_XOR };
-        rules[TK("?")] =        { nullptr,               METHOD(exprTernary),        PREC_TERNARY };
         rules[TK("if")] =       { nullptr,               METHOD(exprTernary),        PREC_TERNARY };
         rules[TK(",")] =        { nullptr,               METHOD(exprTuple),          PREC_TUPLE };
         rules[TK("not in")] =   { nullptr,               METHOD(exprBinaryOp),       PREC_TEST };
@@ -253,25 +252,14 @@ class Compiler {
     
     void exprTernary(){
         auto e = make_expr<TernaryExpr>();
-        if(prev().type == TK("if")){
-            e->true_expr = ctx()->s_expr.popx();
-            // cond
-            parse_expression(PREC_TERNARY + 1);
-            e->cond = ctx()->s_expr.popx();
-            consume(TK("else"));
-            // if false
-            parse_expression(PREC_TERNARY + 1);
-            e->false_expr = ctx()->s_expr.popx();
-        }else{  // ?:
-            e->cond = ctx()->s_expr.popx();
-            // if true
-            parse_expression(PREC_TERNARY + 1);
-            e->true_expr = ctx()->s_expr.popx();
-            consume(TK(":"));
-            // if false
-            parse_expression(PREC_TERNARY + 1);
-            e->false_expr = ctx()->s_expr.popx();
-        }
+        e->true_expr = ctx()->s_expr.popx();
+        // cond
+        parse_expression(PREC_TERNARY + 1);
+        e->cond = ctx()->s_expr.popx();
+        consume(TK("else"));
+        // if false
+        parse_expression(PREC_TERNARY + 1);
+        e->false_expr = ctx()->s_expr.popx();
         ctx()->s_expr.push(std::move(e));
     }
 
diff --git a/tests/03_bool.py b/tests/03_bool.py
index 315491f1..a9b2f219 100644
--- a/tests/03_bool.py
+++ b/tests/03_bool.py
@@ -17,9 +17,4 @@ assert bool(1) == True
 assert bool([]) == False
 assert bool("abc") == True
 assert bool([1,2]) == True
-assert bool('') == False
-
-# test ?:
-a = 5
-assert ((a > 3) ? 1 : 0) == 1
-assert ((a < 3) ? 1 : 0) == 0
\ No newline at end of file
+assert bool('') == False
\ No newline at end of file