Length of string in Jinja/Flask
Question:
Jinja unfortunately does not support executing arbitrary Python code, such as
{% if len(some_var)>1 %} ... {% endif %}
My current workaround is to use the deprecated, ugly, double-underscore method:
{% if some_var.__len__()>1 %} ... {% endif %}
Although this works, I’m afraid that some future implementation of strings might break this code. Is there a better way to do this?
Answers:
You can use the length filter:
{% if some_var|length > 1 %}
Jinja unfortunately does not support executing arbitrary Python code, such as
{% if len(some_var)>1 %} ... {% endif %}
My current workaround is to use the deprecated, ugly, double-underscore method:
{% if some_var.__len__()>1 %} ... {% endif %}
Although this works, I’m afraid that some future implementation of strings might break this code. Is there a better way to do this?
You can use the length filter:
{% if some_var|length > 1 %}