使用 pythonanywhere with python 和 flask 的条件测试不起作用

Question

我的简单条件测试不起作用。

这是 flask_app.py 代码：

testing_conditional_args = []
testing_conditional_args.append("a")
testing_conditional_args.append("b")
testing_conditional_args.append("c")
@app.route("/testing_conditional/", methods=['POST'])
def testing_conditional():
    if request.method == "POST":
          return render_template("testing_conditional.html", testing_conditional_args=testing_conditional_args)
    return redirect(url_for('testing_conditional'))

这是 html 模板 (testing_conditional.html):

var0 = {{testing_conditional_args[0]}} <br>
var1 = {{testing_conditional_args[1]}} <br>
var2 = {{testing_conditional_args[2]}} <br>
{% if var1 == "b" %}
    args var1 and "b" are equal<br>
{% endif %}
{% if var1 != "b" %}
    args var1 and "b" are not equal<br>
{% endif %}
{% if "a" != "b" %}
    args "a" and "b" are not equal<br>
{% endif %}
{% if "a" == "a" %}
    args "a" and "a" are equal<br>
{% endif %}

Web 浏览器中的输出显示 var1 是 "b"，但条件测试不起作用。

var0 = a
var1 = b
var2 = c
args var1 and "b" are not equal
args "a" and "b" are not equal
args "a" and "a" are equal

它说 var1 和 "b" 在看起来应该相等的时候并不相等。为什么 var1 不被识别为 "b"？

Answer 1

条件测试使用 set 命令工作：

        {% set var0=testing_conditional_args[0] %}
        {% set var1=testing_conditional_args[1] %}
        {% set var2=testing_conditional_args[2] %}

        {% if var1 == "b" %}
            args var1 and "b" are equal<br>
            <div style="color:blue; font-size:200%; text-align:left" >"Conditional Formatting"</div>
        {% endif %}

使用 pythonanywhere with python 和 flask 的条件测试不起作用

Conditional test not working using pythonanywhere with python and flask

python

flask

pythonanywhere