["python","yaml","jinja2","newline"]
jinja2 how to remove trailing newline

I'm using jinja 2 to output a yaml file but can't seem to get rid of a trailing newline and the end of a for loop. Eg the below - request: path: {{ path }} headers: origin: 'somedomain.com' user-agent: 'agent' referer: 'some.domain.com' authority: 'somedomain.com' querystring: {% for key, value in querystring.items() -%} {{ key }}: '{{ value }}' {% endfor %} response: content: file: {{ content }} gives me the output: - request: path: /some/path headers: origin: 'somedomain.com' user-agent: 'agent' referer: 'somedomain.com' authority: 'somedomain.com' querystring: postcode: 'xxxxxx' houseNo: '55' response: content: file: address.json With an additional unwanted blank line after houseNo. How do I get rid of this line?
Change your loop to strip whitespace from the top AND bottom of the output (notice extra - at the for loop close): {% for key, value in querystring.items() -%} {{ key }}: '{{ value }}' {%- endfor %} In my tests (using https://github.com/abourguignon/jinja2-live-parser), the - must come after the first {%, not before the last to achieve what you're asking for. Docs: https://jinja.palletsprojects.com/en/latest/templates/#whitespace-control