Error on Bicep module – on Azure CLI (2.22.0) for Windows 10

If you are seeing “fromisoformat” error while running az bicep version or any other az bicep command – you are not alone πŸ™‚

Check this open issue reported on GitHub by community member –

After updating to the latest Azure CLI (2.22.0) for Windows 10, I am now seeing the same error as others have reported:

Any command such as “az bicep version” is producing the following error:

The command failed with an unexpected error.
Here is the traceback and detailed error:
type object 'datetime.datetime' has no attribute 'fromisoformat'
Traceback (most recent call last):
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/", line 231, in invoke
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/", line 657, in execute
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/", line 720, in _run_jobs_serially
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/", line 691, in _run_job
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/", line 328, in call
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/", line 807, in default_command_handler
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/resource/", line 3294, in build_bicep_file
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/resource/", line 63, in run_bicep_command
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/resource/", line 152, in _load_bicep_version_check_result_from_cache
AttributeError: type object 'datetime.datetime' has no attribute 'fromisoformat'

Is there a temp workaround?

One of the workarounds is to uninstalled Azure CLI 2.22.0 , and then install the prior version 2.21.0. You could confirm 2.21.0 version is working for you by running the same command.

Hope this will be helpful for you, as i faced with this issue hours before my demo to #GlobalAzure 2021 😐

Are you ready to start your Bicep transformation journey in Azure?

Hello friends,

I am getting ready bits and pieces of the presentation and demo code for the #GlobalAzure 2021 event.

This is going to be my second year in a row, presenting at this global event, and I am pumped to contribute with two new sessions this year.

Feel free to check out the details of each session and links here .

Session banner for upcoming presentation on Global Azure 2021

WHY bother to transfrom your exising Azure ARM templates into Bicep?

  • Easy to understand and maintain code for your Azure infrastructure
  • Day zero support for all resource types & API versions
  • Nice transparent abstractionΒ for the underlying platform
  • Awesome Tooling – VS Code extension for Bicep
  • Deep integration with other Azure Services
  • Preflight validation – both Bicep/ARM does preflight validation on entire template
  • Provides high level of confidence that your code is ‘syntactically valid’ before deploying
  • Support – starting from v.03, Bicep is 100% supported by Microsoft Support Plans

This time, I am looking forward to share level 200 talk and demos, where we will ALL deep dive into challenges of transforming exisiting ARM templates into Azure Bicep.

We will inspect the ARM JSON decompiler, which comes with Azure Bicep and how to make it work your way.

Stay tunes, i hope to see you all during the event!

Get started with data transformation services in Azure – Global Azure 2021

Azure Global 2021 event in mid-April 2021

Hello friends,
I am back again, this time with another follow-up announcement of a second Global Azure 2021 session in Azure Data focus area, for ALL of you!

I am truly excited to present the following session on April 17th, live from my broadcasting studio in East Cost:)

This session will be a deep dive into different data movement scenarios using first-class tooling in Azure data echo-system and Azure Data Factory (ADF). We will learn about handy new features and data connectors, while copying and transforming datasets from a Data Lake and SQL Relational Database storages. Thus, tune in to learn about latest developments in Microsoft Azure data transformation services.

In my second session, I will share following journey with you:

Abstract of the upcoming session provided below πŸ˜‰

We will learn about what is ETL and ELT stands for in data world, and how Azure Data Factory (ADF) service could help you. Along the way, we will look into inner-workings and fundamentals of a cloud-based ETL and data integration service that allows you to create data-driven workflows for orchestrating data movement and transforming data at scale.

Finally, we will conclude the session with ADF demo and Q&A

TheCloudMarathoner πŸ™‚

Please let me know, what topics are you interested in?

Transfrom your Azure ARM into Bicep during the Global Azure 2021

Global Azure 2021 event in mid-April.

Hello eveyone,
I am very happy to share exciting news with all of you.

Few days ago, i have receieved an email confirming acceptance of my both Azure sessions for the Global Azure 2021 event. I am truely trilled to present on April 16th and 17th following two sesions for eveyone live:

I am looking forward for your participiation, and tune in to learn about latest developments in Microsoft Azure.

In my first session i will share the following new session with you.

Abstract of the presentation as is:

Infrastructure as a Code (IaC) is important strategy to manage your digital estate in any cloud environment. Simplifying management of your infrastructure while re-using code is even better. In Microsoft Azure, we have ARM (Azure Resource Manager) templates that could declaratively define your cloud project infrastructure.

However, it is not easy to author ARM JSON templates and maintain them when your project grows and requires changes. In this demo heavy session, we will introduce the Azure Bicep language and demonstrate how it simplifies authoring ARM templates for your Azure infrastructure. We will author a manageable, readable, and modularized Azure infrastructure code, while using familiar tools.

TheCloudMarathoner πŸ™‚

Please let me know, what topics are you interested in?