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                # 20 自定義過濾器 ```text ### 自定義模板過濾器 過濾器本質上就是一個函數,如果在模板中調用這個過濾器,那么就會將這個變量的值作為第一個參數傳給過濾器這個函數,然后函數的返回值會作為這個過濾器的返回值 使用到一個裝飾器:@app.template_filter('my_cut') # 指定一個名字 @app.template_filter('my_cut') def cut(value): value = value.replace("hello",'') return value <p>{{ article|my_cut }}</p> """ ```
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