@register.simple_tag
def active_starts(request, pattern):
    if request.path.startswith(pattern):
        return 'active'
    return ''
Validates a GCS path against gs://bucket/object URI format.
dataset/ETHPy150Open Tivix/django-common/django_common/templatetags/custom_tags.py/active_starts--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/DataflowPythonSDK/google/cloud/dataflow/utils/pipeline_options_validator.py/PipelineOptionsValidator.validate_gcs_path