3D Print Duration in hours

gistfile1.txt

template:
  - sensor:
      - name: "Prusa Print Graph Span"
        state: >
          {% set val = states('sensor.prusamini_print_start') %}
          {% if val in ['unknown', 'unavailable', ''] %}
            1h
          {% else %}
            {%- set hours = (now() - as_datetime(val)).total_seconds() / 3600 -%}
            {%- set base = hours | int -%}
            {%- if hours > base -%}
              {{ base + 1 }}h
            {%- else -%}
              {{ base }}h
            {%- endif -%}
          {% endif %}