fix invalid custom generated issue (#864)

* fix invalid custom

* fix #861

* fix test

src/generate/renders/generated/CliCustom.ts

@@ -388,48 +388,42 @@ function ConstructValuation(
     defaultValue: string = null,
     needIfClause = true,
 ): string[] {
-    let str = [];
-    if (isNullOrUndefined(defaultValue)) {
-        let left = '';
-        if (isGeneric) {
-            if (value.startsWith("'") && value.endsWith("'")) {
-                left = prefix + GetInstancePath(model, required) + '.';
-            } else {
-                str.push(prefix + 'if ' + value + ' is not None:');
-                left = prefix + '    ' + GetInstancePath(model, required) + '.';
-            }
-            for (let i = 1; i < classNames.length; ++i) {
-                left = left + classNames[i] + '.';
-            }
-            left = left + paramName;
-        } else {
-            left = prefix + classNames[0];
-            for (let i = 1; i < classNames.length; ++i) {
-                left = left + "['" + classNames[i] + "']";
-            }
+    const str = [];
+    let sentence = '';
+    if (isGeneric) {
+        if (
+            !(value.startsWith("'") && value.endsWith("'")) &&
+            !(value.startsWith('"') && value.endsWith('"'))
+        ) {
+            str.push(prefix + 'if ' + value + ' is not None:');
+            prefix += '    ';
+        }
 
-            if (!isNullOrUndefined(paramName)) {
-                left = left + "['" + paramName + "']";
-            }
+        sentence = prefix + GetInstancePath(model, required) + '.';
+        for (let i = 1; i < classNames.length; ++i) {
+            sentence += classNames[i] + '.';
         }
-        str.push(left + ' = ' + value);
+        sentence += paramName;
     } else {
-        let ifClause = '';
-        if (needIfClause) {
-            ifClause = ' if ' + value + ' is None else ' + value;
+        sentence = prefix + classNames[0];
+        for (let i = 1; i < classNames.length; ++i) {
+            sentence += "['" + classNames[i] + "']";
+        }
+
+        if (!isNullOrUndefined(paramName)) {
+            sentence += "['" + paramName + "']";
         }
-        str = str.concat(
-            ConstructValuation(
-                model,
-                required,
-                isGeneric,
-                prefix,
-                classNames,
-                paramName,
-                defaultValue,
-            ) + ifClause,
-        );
     }
+
+    if (isNullOrUndefined(defaultValue)) {
+        sentence += ' = ' + value;
+    } else {
+        sentence += ' = ' + defaultValue;
+        if (needIfClause) {
+            sentence += ' if ' + value + ' is None else ' + value;
+        }
+    }
+    str.push(sentence);
     return str;
 }
 
@@ -955,6 +949,12 @@ function GetSimpleCallItem(
                             parameterHandler.Parameter_Type(param),
                         );
                 }
+            } else if (param.required) {
+                if (schemaHandler.Schema_Type(param.schema) === SchemaType.Object) {
+                    parameterPair = paramNamePython + '={}';
+                } else {
+                    parameterPair = paramNamePython + '=None';
+                }
             } else {
                 parameterPair = paramNamePython + '=None';
             }
@@ -985,6 +985,12 @@ function GetSimpleCallItem(
                         '=' +
                         ToPythonString(paramDefaultValue, parameterHandler.Parameter_Type(param));
                 }
+            } else if (param.required) {
+                if (schemaHandler.Schema_Type(param.schema) === SchemaType.Object) {
+                    parameterPair = paramNamePython + '={}';
+                } else {
+                    parameterPair = paramNamePython + '=None';
+                }
             } else {
                 parameterPair = paramNamePython + '=None';
             }

test/scenarios/managed-network/output/src/managed-network/azext_managed_network/generated/custom.py

@@ -168,8 +168,7 @@ def managed_network_mn_group_update(instance,
                                     no_wait=False):
     if location is not None:
         instance.location = location
-    if "Connectivity" is not None:
-        instance.kind = "Connectivity"
+    instance.kind = "Connectivity"
     if management_groups is not None:
         instance.management_groups = management_groups
     if subscriptions is not None: