diff --git a/boards/default_src/python/blocks/math.js b/boards/default_src/python/blocks/math.js
index 4b4e9cc3..64002e29 100644
--- a/boards/default_src/python/blocks/math.js
+++ b/boards/default_src/python/blocks/math.js
@@ -489,7 +489,7 @@ export const math_round = {
 export const text_to_number = {
     init: function () {
         var TO_INT_FLOAT =
-            [[Blockly.Msg.MIXLY_TO_INT, 'int'], [Blockly.Msg.MIXLY_TO_FLOAT, 'float'], [Blockly.Msg.MIXLY_TO_BITES, 'b'],[Blockly.Msg.LANG_MATH_BYTE+Blockly.Msg.MIXLY_TO_INT,'bti']];
+            [[Blockly.Msg.MIXLY_TO_INT, 'int'], [Blockly.Msg.MIXLY_TO_FLOAT, 'float'], [Blockly.Msg.MIXLY_TO_BITES, 'b'], [Blockly.Msg.LANG_MATH_BYTE + Blockly.Msg.MIXLY_TO_INT, 'bti']];
         this.setColour(MATH_HUE);
         this.appendValueInput('VAR')
             .appendField(new Blockly.FieldDropdown(TO_INT_FLOAT), 'TOWHAT');
@@ -533,7 +533,7 @@ export const turn_to_int = {
     init: function () {
         this.setColour(MATH_HUE);
         this.appendValueInput('VAR')
-            .appendField(Blockly.Msg.LANG_MATH_BYTE+Blockly.Msg.MIXLY_TO_HEX);
+            .appendField(Blockly.Msg.LANG_MATH_BYTE + Blockly.Msg.MIXLY_TO_HEX);
         this.setOutput(true, Number);
         this.setTooltip(Blockly.Msg.MIXLY_PYTHON_TOOLTIP_TOHEX)
     }
@@ -547,16 +547,18 @@ export const generate_cartesian_product = {
     init: function () {
         this.setColour(MATH_HUE);
         this.itemCount_ = 1;
-        this.updateShape_();
         this.setMutator(new Blockly.icons.MutatorIcon(['lists_create_with_item'], this));
-        this.appendValueInput('repeat')
+        this.appendDummyInput('DUMMY')
+            .appendField(Blockly.Msg.MIXLY_PRODUCT + Blockly.Msg.MIXLY_GENERATE_CARTESIAN_PRODUCT);
+        this.appendValueInput('REPEAT')
             .appendField(Blockly.Msg.MIXLY_EVERY_PER_ELEPER_ELEMENT);
         this.appendDummyInput()
             .appendField(Blockly.Msg.CONTROLS_REPEAT_TITLE_TIMES);
-        this.setPreviousStatement(false)
-        this.setNextStatement(false)
-        this.setOutput(true)
+        this.setPreviousStatement(false);
+        this.setNextStatement(false);
+        this.setOutput(true);
         this.setTooltip(Blockly.Msg.LISTS_CREATE_WITH_PYTHON_TOOLTIP);
+        this.updateShape_();
     },
     /**
      * Create XML to represent list inputs.
@@ -617,7 +619,7 @@ export const generate_cartesian_product = {
         // Reconnect any child blocks.
         for (var i = 0; i < this.itemCount_; i++) {
             if (connections[i]) {
-                this.getInput('ADD' + i).connection.connect(connections[i]);
+                this.getInput(`ADD${i}`).connection.connect(connections[i]);
             }
         }
     },
@@ -630,7 +632,7 @@ export const generate_cartesian_product = {
         var itemBlock = containerBlock.getInputTargetBlock('STACK');
         var i = 0;
         while (itemBlock) {
-            var input = this.getInput('ADD' + i);
+            var input = this.getInput(`ADD${i}`);
             itemBlock.valueConnection_ = input && input.connection.targetConnection;
             i++;
             itemBlock = itemBlock.nextConnection &&
@@ -647,9 +649,9 @@ export const generate_cartesian_product = {
         if (this.getInput('EMPTY')) {
             this.removeInput('EMPTY');
         } else {
-            var i = 0;
-            while (this.getInput('ADD' + i)) {
-                this.removeInput('ADD' + i);
+            let i = 0;
+            while (this.getInput(`ADD${i}`)) {
+                this.removeInput(`ADD${i}`);
                 i++;
             }
         }
@@ -658,11 +660,9 @@ export const generate_cartesian_product = {
             this.appendDummyInput('EMPTY')
                 .appendField(Blockly.Msg.MIXLY_EMPTY_REMINDER);
         } else {
-            for (var i = 0; i < this.itemCount_; i++) {
-                var input = this.appendValueInput('ADD' + i);
-                if (i == 0) {
-                    input.appendField(Blockly.Msg.MIXLY_PRODUCT+Blockly.Msg.MIXLY_GENERATE_CARTESIAN_PRODUCT);
-                }
+            for (let i = 0; i < this.itemCount_; i++) {
+                this.appendValueInput(`ADD${i}`);
+                this.moveInputBefore(`ADD${i}`, 'REPEAT');
             }
         }
     },
diff --git a/boards/default_src/python/generators/math.js b/boards/default_src/python/generators/math.js
index bbb12984..ae212315 100644
--- a/boards/default_src/python/generators/math.js
+++ b/boards/default_src/python/generators/math.js
@@ -50,15 +50,15 @@ export const math_bit = function (_, generator) {
 
 export const math_arithmetic = function (a, generator) {
     var b = {
-            ADD: [" + ", generator.ORDER_ADDITIVE],
-            MINUS: [" - ", generator.ORDER_ADDITIVE],
-            MULTIPLY: [" * ", generator.ORDER_MULTIPLICATIVE],
-            DIVIDE: [" / ", generator.ORDER_MULTIPLICATIVE],
-            QUYU: [' % ', generator.ORDER_MULTIPLICATIVE],//增加取余操作
-            ZHENGCHU: [' // ', generator.ORDER_MULTIPLICATIVE],//增加整除操作
-            POWER: [" ** ", generator.ORDER_EXPONENTIATION]
-        }[a.getFieldValue("OP")],
-        c = b[0],
+        ADD: [" + ", generator.ORDER_ADDITIVE],
+        MINUS: [" - ", generator.ORDER_ADDITIVE],
+        MULTIPLY: [" * ", generator.ORDER_MULTIPLICATIVE],
+        DIVIDE: [" / ", generator.ORDER_MULTIPLICATIVE],
+        QUYU: [' % ', generator.ORDER_MULTIPLICATIVE],//增加取余操作
+        ZHENGCHU: [' // ', generator.ORDER_MULTIPLICATIVE],//增加整除操作
+        POWER: [" ** ", generator.ORDER_EXPONENTIATION]
+    }[a.getFieldValue("OP")];
+    var c = b[0],
         b = b[1],
         d = generator.valueToCode(a, "A", b) || "0";
     a = generator.valueToCode(a, "B", b) || "0";
@@ -290,7 +290,7 @@ export const text_to_number = function (_, generator) {
     var towhat = this.getFieldValue('TOWHAT');
     var str = generator.valueToCode(this, 'VAR', generator.ORDER_ATOMIC);
     if (towhat == 'b') return ['' + str + '.encode("utf-8")', generator.ORDER_ATOMIC];
-    else if(towhat == 'bti') return['int.from_bytes('+str+',"big")',Blockly.Python.ORDER_ATOMIC];
+    else if (towhat == 'bti') return ['int.from_bytes(' + str + ',"big")', generator.ORDER_ATOMIC];
     return [towhat + "(" + str + ')', generator.ORDER_ATOMIC];
 }
 
@@ -310,15 +310,15 @@ export const turn_to_int = function (_, generator) {
 }
 
 export const generate_cartesian_product = function (_, generator) {
-    generator.definitions_.import_itertools = "import itertools";
-    var re = generator.valueToCode(this, 'repeat', generator.ORDER_ATOMIC);
-    var code = new Array(this.itemCount_);
-    var default_value = '0';
-    for (var n = 0; n < this.itemCount_; n++) {
-        code[n] = generator.valueToCode(this, 'ADD' + n,
-            generator.ORDER_NONE) || default_value;
+    generator.definitions_.import_itertools = 'import itertools';
+    let re = generator.valueToCode(this, 'REPEAT', generator.ORDER_ATOMIC);
+    let items = new Array(this.itemCount_);
+    for (let n = 0; n < this.itemCount_; n++) {
+        items[n] = generator.valueToCode(this, `ADD${n}`, generator.ORDER_NONE) || '0';
+    }
+    let code = '';
+    if (this.itemCount_) {
+        code = `itertools.product(${items.join(', ')}, repeat=${re})`;
     }
-    // var code = '[' + code.join(', ') + ']';
-    // var code = 'itertools.product('+'repeat='+re+')';
     return [code, generator.ORDER_ATOMIC];
 }
\ No newline at end of file
diff --git a/boards/default_src/python_pyodide/template.xml b/boards/default_src/python_pyodide/template.xml
index ddde0520..e315702e 100644
--- a/boards/default_src/python_pyodide/template.xml
+++ b/boards/default_src/python_pyodide/template.xml
@@ -390,7 +390,7 @@
       </value>
     </block>
     <block type="generate_cartesian_product">
-      <value name="repeat">
+      <value name="REPEAT">
         <shadow type="math_number">
           <field name="NUM">2</field>
         </shadow>