[conversations] Drop python 3.6 (Azure#25792)

* Improve the readability of source code

Change str.format() formatting of the source code to f-string formatting.

* Fix drop python 3.6

* style: revert keyvault

* style: revert keyvault

* style: revert keyvault

* style: revert keyvault

* fix: README.md to only warn of python2.7

Co-authored-by: Wonhyeong Seo <wonhseo@kakao.com>

Author: syso-jxx

sdk/cognitivelanguage/azure-ai-language-conversations/CHANGELOG.md

@@ -9,6 +9,7 @@
 ### Bugs Fixed
 
 ### Other Changes
+* This version and all future versions will require Python 3.7+. Python 3.6 is no longer supported.
 
 ## 1.1.0b2 (2022-07-01)
 

sdk/cognitivelanguage/azure-ai-language-conversations/README.md

@@ -18,7 +18,7 @@ _Azure SDK Python packages support for Python 2.7 ended 01 January 2022. For mor
 
 ### Prerequisites
 
-* Python 3.6 or later is required to use this package.
+* Python 3.7 or later is required to use this package.
 * An [Azure subscription][azure_subscription]
 * An existing Azure Language Service Resource
 

sdk/cognitivelanguage/azure-ai-language-conversations/samples/README.md

@@ -31,7 +31,7 @@ These sample programs show common scenarios for the Conversational Language Unde
 
 ## Prerequisites
 
-- Python 3.6 or later is required to use this package.
+- Python 3.7 or later is required to use this package.
 - You must have an [Azure subscription][azure_subscription] and an
   [Azure CLU account][azure_clu_account] to run these samples.
 

sdk/cognitivelanguage/azure-ai-language-conversations/setup.py

@@ -50,14 +50,13 @@
         "Programming Language :: Python",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: MIT License",
     ],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     zip_safe=False,
     packages=find_packages(exclude=[
         'tests',