Cannot initialize new BatchServiceClient

[krzysztofstepien-tomtom]

Hi

I have problems with creating new jobs in Azure via Python library

Once new BatchClient is created, and job is added to it, i am getting the following error:
keyError: batchUrl

It seems that there is an issue in azure/batch/_configuration.py file

    def __init__(
            self, credentials, batch_url):

        if credentials is None:
            raise ValueError("Parameter 'credentials' must not be None.")
        if batch_url is None:
            raise ValueError("Parameter 'batch_url' must not be None.")
        base_url = '{batchUrl}'

The initialization of base_url seems incorrect, there should be
base_url = f'{batch_url}' instead in my opinion