pythonjinja2

jinja2 Template output int

jinja2 Template cannot get primitive types?

Here's my test:

x = jinja2.Template('{{x|int}}',).render(x=1)
type(x)
<class 'str'>

Hopefully the result will be：<class 'int'>

Solution

  • jinja is by design made for rendering text based templates (eg. html). even as you specify {{x|int}} it will still change into a string when .render() is called

    method 1:
    converting to int outside of the Template

    x = int(jinja2.Template('{{x|int}}',).render(x=1))

    method 2:
    using Native Environment to return primitive types (Jinja2 3.0+)

    from jinja2.nativetypes import NativeEnvironment
template = NativeEnvironment().from_string("{{x|int}}")
x = template.render(x=1)
print(type(x))