callable(object) Return whether the object is callable (i.e., some kind of function). Note that classes are callable, as are instances with a __call__() method. defined(value) Return true if the variable is def
{%ifloop.indexisdivisibleby3%}{%ifloop.indexisdivisibleby(3)%} 常见的测试函数有: callable(object)是否是一个函数, defined(value) 值是否定义,iterable(value)是否可迭代,lower(value)是否小写,none(value)是否为none,number(value)是否是数字 string(value)是否是字符串 {%ifvariableisdefined%}value of ...
The if statement in Jinja is comparable with the Python if statement. In the simplest form, you can use it to test if a variable is defined, not empty and not false: {% if users %} {% for user in users %} {{ user.username|e }} {% endfor %} {% endif %} For multiple b...
This will output the value of my_variable if the variable was defined, otherwise 'my_variable is not defined'. If you want to use default with variables that evaluate to false you have to set the second parameter to true: {{ ''|default('the string was empty', true) }} Aliases : ...
If the value is undefined it will return the passed default value, otherwise the value of the variable: {{ my_variable|default('my_variable is not defined') }} This will output the value of my_variable if the variable was defined, otherwise 'my_variable is not defined'. If you want...
{% if var != 0 %} Value is not 0 {% endif %} ```3.如何判断一个变量是否存在或非空？可以使用`is defined`来检查变量是否已经定义，`is not none`来检查变量是否为非空。例如：```{% if var is defined %} Variable exists {% endif %} {% if var is not none %} Variable is not ...
If The if statement in Jinja is comparable with the Python if statement. In the simplest form, you can use it to test if a variable is defined, not empty and not false: {% if users %} {% for user in users %} {{ user.username|e }} {% endfor %} ...
defined(value) Return true if the variable is defined: {% if variable is defined %} value of variable: {{ variable }} {% else %} variable is not defined {% endif %} See thefilter for a simple way to set undefined variables. divisibleby(value,num) ...
string(value):将变量转换成字符串。wordcount(s):计算一个长字符串中单词的个数。九:测试器测试器主要用来判断一个值是否满足某种类型,语法是:if...is...:{% if variable is escaped%}value of variable: {{ escaped }}{% else %}variable is not escaped{% endif %}Jinja2中测试器有:callab...
{% for host in groups['dbservers'] if host !="1.1.1.1" %} {{host}} {% endfor %} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 三、如何使用模板 ⼀个基于Facts的Jinja2 实例 # cat config.j2 {# use variable example #} {# 都是内置变量 #} ...