Jinja convert string to integer

Question

I am trying to convert a string that has been parsed using a regex into a number so I can multiply it, using Jinja2. This file is a template to be used within an ansible script.

I have a series of items which all take the form of <word><number> such as aaa01, aaa141, bbb05.

The idea was to parse the word and number(ignoring leading zeros) and use them later in the template.

I wanted to manipulate the number by multiplication and use it. Below is what I have done so far ```

{% macro get_host_number() -%} {{ item | regex_replace('^\D*[0]?(\d*)$', '\\1') }} {%- endmacro %}  {% macro get_host_name() -%} {{ item | regex_replace('^(\D*)\d*$', '\\1') }} {%- endmacro %}  {% macro get_host_range(name, number) -%} {% if name=='aaa' %} {{ ((number*5)+100) | int | abs }} {% elif name=='bbb' %} {{ ((number*5)+200) | int | abs }} {% else %} {{ ((number*5)+300) | int | abs }} {% endif %} {%- endmacro %}  {% set number = get_host_number() %} {% set name = get_host_name() %} {% set value = get_host_range(name, number) %}  Name: {{ name }} Number: {{ number }} Type: {{ value }} 

With the above template I am getting an error coercing to Unicode: need string or buffer, int found which i think is telling me it cannot convert the string to integer, however i do not understand why. I have seen examples doing this and working.

Answer 1

You need to cast string to int after regex'ing number:

{% set number = get_host_number() | int %} 

And then there is no need in | int inside get_host_range macro.