diff --git a/AutoRest/Generators/Python/Azure.Python/Templates/AzureServiceClientTemplate.cshtml b/AutoRest/Generators/Python/Azure.Python/Templates/AzureServiceClientTemplate.cshtml
index 1bd45c95a8d80..383db9e00700c 100644
--- a/AutoRest/Generators/Python/Azure.Python/Templates/AzureServiceClientTemplate.cshtml
+++ b/AutoRest/Generators/Python/Azure.Python/Templates/AzureServiceClientTemplate.cshtml
@@ -92,23 +92,37 @@ else
 @EmptyLine
 class @(Model.Name)(object):
     """@Model.ServiceDocument
-@EmptyLine
-    :param config: Configuration for client.
-    :type config: @(Model.Name)Configuration
+    @EmptyLine
+    :ivar config: Configuration for client.
+    :vartype config: @(Model.Name)Configuration
 @if (Model.MethodGroupModels.Any())
 {
-@EmptyLine
-  foreach (var methodGroup in Model.MethodGroupModels)
-  {
+    @EmptyLine
+    foreach (var methodGroup in Model.MethodGroupModels)
+    {
 @:    :ivar @(methodGroup.MethodGroupName.ToPythonCase()): @(methodGroup.MethodGroupName) operations
 @:    :vartype @(methodGroup.MethodGroupName.ToPythonCase()): .operations.@(methodGroup.MethodGroupType)
-  }
+    }
+}
+@EmptyLine
+@foreach (var property in Model.Properties)
+{
+@:    @ParameterWrapComment(string.Empty, ServiceClientTemplateModel.GetPropertyDocumentationString(property))
+@:    @ParameterWrapComment(string.Empty, ":type " + property.Name + ": " + Model.GetPropertyDocumentationType(property.Type))
 }
+
+@if (!Model.IsCustomBaseUri)
+{
+@:    :param str base_url: Service URL
+}
+    :param str filepath: Existing config
     """
 @EmptyLine
-    def __init__(self, config):
+    def __init__(
+            self, @(Model.RequiredConstructorParameters)@(Model.IsCustomBaseUri ? "" : "base_url=None, ")filepath=None):
 @EmptyLine
-        self._client = ServiceClient(@(Model.Properties.Any(p => p.Type.IsPrimaryType(KnownPrimaryType.Credentials)) ? "config.credentials" : PythonConstants.None), config)
+        self.config = @(Model.Name)Configuration(@(Model.ConfigConstructorParameters)@(Model.IsCustomBaseUri ? "" : "base_url, ")filepath)
+        self._client = ServiceClient(@(Model.Properties.Any(p => p.Type.IsPrimaryType(KnownPrimaryType.Credentials)) ? "self.config.credentials" : PythonConstants.None), self.config)
 @EmptyLine
 @if (Model.ModelTemplateModels.Any())
 {
@@ -121,7 +135,6 @@ else
         self._serialize = Serializer()
         self._deserialize = Deserializer(client_models)
 @EmptyLine
-        self.config = config
 @foreach (var methodGroup in Model.MethodGroupModels)
 {
         @:self.@(methodGroup.MethodGroupName.ToPythonCase()) = @(methodGroup.MethodGroupType)(
diff --git a/AutoRest/Generators/Python/Python/TemplateModels/ServiceClientTemplateModel.cs b/AutoRest/Generators/Python/Python/TemplateModels/ServiceClientTemplateModel.cs
index 60629ea26ca28..24317c08c1faa 100644
--- a/AutoRest/Generators/Python/Python/TemplateModels/ServiceClientTemplateModel.cs
+++ b/AutoRest/Generators/Python/Python/TemplateModels/ServiceClientTemplateModel.cs
@@ -105,6 +105,24 @@ public virtual string RequiredConstructorParameters
             }
         }
 
+        public virtual string ConfigConstructorParameters
+        {
+            get
+            {
+                var configParams = new List<string>();
+                foreach (var property in this.Properties)
+                {
+                    configParams.Add(property.Name.ToPythonCase());
+                }
+                var param = string.Join(", ", configParams);
+                if (!param.IsNullOrEmpty())
+                {
+                    param += ", ";
+                }
+                return param;
+            }
+        }
+
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "ValueError"),
             System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "TypeError"),
             System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "str"),
diff --git a/AutoRest/Generators/Python/Python/Templates/ServiceClientInitTemplate.cshtml b/AutoRest/Generators/Python/Python/Templates/ServiceClientInitTemplate.cshtml
index fa51a54aafb30..d2bce3c67bd79 100644
--- a/AutoRest/Generators/Python/Python/Templates/ServiceClientInitTemplate.cshtml
+++ b/AutoRest/Generators/Python/Python/Templates/ServiceClientInitTemplate.cshtml
@@ -9,13 +9,10 @@
 @Header("# ").TrimMultilineHeader()
 # --------------------------------------------------------------------------
 @EmptyLine
-from .@(Model.Name.ToPythonCase()) import @(Model.Name), @(Model.Name)Configuration
+from .@(Model.Name.ToPythonCase()) import @(Model.Name)
 from .version import VERSION
 @EmptyLine
-__all__ = [
-    '@(Model.Name)',
-    '@(Model.Name)Configuration'
-]
+__all__ = ['@(Model.Name)']
 @EmptyLine
 __version__ = VERSION
 @EmptyLine
\ No newline at end of file
diff --git a/AutoRest/Generators/Python/Python/Templates/ServiceClientTemplate.cshtml b/AutoRest/Generators/Python/Python/Templates/ServiceClientTemplate.cshtml
index 9172b54791c76..e6ba317b1e190 100644
--- a/AutoRest/Generators/Python/Python/Templates/ServiceClientTemplate.cshtml
+++ b/AutoRest/Generators/Python/Python/Templates/ServiceClientTemplate.cshtml
@@ -86,8 +86,8 @@ else
 class @(Model.Name)(object):
     """@Model.ServiceDocument
 @EmptyLine
-    :param config: Configuration for client.
-    :type config: @(Model.Name)Configuration
+    :ivar config: Configuration for client.
+    :vartype config: @(Model.Name)Configuration
 @if (Model.MethodGroupModels.Any())
 {
 @EmptyLine
@@ -97,11 +97,25 @@ class @(Model.Name)(object):
 @:    :vartype @(methodGroup.MethodGroupName.ToPythonCase()): .operations.@(methodGroup.MethodGroupType)
   }
 }
+@EmptyLine
+@foreach (var property in Model.Properties)
+{
+@:    @ParameterWrapComment(string.Empty, ServiceClientTemplateModel.GetPropertyDocumentationString(property))
+@:    @ParameterWrapComment(string.Empty, ":type " + property.Name + ": " + Model.GetPropertyDocumentationType(property.Type))
+}
+
+@if (!Model.IsCustomBaseUri)
+{
+@:    :param str base_url: Service URL
+}
+    :param str filepath: Existing config
     """
 @EmptyLine
-    def __init__(self, config):
+    def __init__(
+            self, @(Model.RequiredConstructorParameters)@(Model.IsCustomBaseUri ? "" : "base_url=None, ")filepath=None):
 @EmptyLine
-        self._client = ServiceClient(@(Model.Properties.Any(p => p.Type.IsPrimaryType(KnownPrimaryType.Credentials)) ? "config.credentials" : PythonConstants.None), config)
+        self.config = @(Model.Name)Configuration(@(Model.ConfigConstructorParameters)@(Model.IsCustomBaseUri ? "" : "base_url, ")filepath)
+        self._client = ServiceClient(@(Model.Properties.Any(p => p.Type.IsPrimaryType(KnownPrimaryType.Credentials)) ? "self.config.credentials" : PythonConstants.None), self.config)
 @EmptyLine
 @if (Model.ModelTemplateModels.Any())
 {
@@ -114,7 +128,6 @@ else
         self._serialize = Serializer()
         self._deserialize = Deserializer(client_models)
 @EmptyLine
-        self.config = config
 @foreach (var methodGroup in Model.MethodGroupModels)
 {
         @:self.@(methodGroup.MethodGroupName.ToPythonCase()) = @(methodGroup.MethodGroupType)(