Question

app.py - ＆gt;

def pretty_date(time=False):
    from datetime import datetime
    now = datetime.now()
    if type(time) is int:
        diff = now - datetime.fromtimestamp(time)
    elif isinstance(time,datetime):
        diff = now - time
    elif not time:
        diff = now - now
    second_diff = diff.seconds
    day_diff = diff.days

    if day_diff < 0:
        return ''

    if day_diff == 0:
        if second_diff < 10:
            return "just now"
        if second_diff < 60:
            return str(second_diff) + " seconds ago"
        if second_diff < 120:
            return "a minute ago"
        if second_diff < 3600:
            return str(second_diff / 60) + " minutes ago"
        if second_diff < 7200:
            return "an hour ago"
        if second_diff < 86400:
            return str(second_diff / 3600) + " hours ago"
    if day_diff == 1:
        return "Yesterday"
    if day_diff < 7:
        return str(day_diff) + " days ago"
    if day_diff < 31:
        return str(day_diff / 7) + " weeks ago"
    if day_diff < 365:
        return str(day_diff / 30) + " months ago"
    return str(day_diff / 365) + " years ago"

和HTML模板 - ＆gt;

{{pretty_date(post.time)}}

给出错误

UndefinedError：＆＃39; pretty_date＆＃39;未定义

有没有办法可以打电话给它？相同的app.py呈现html页面顺便说一句。

Answer 1

如果我没弄错的话，你必须通过关键字参数在render_template调用中传递你想要在HTML代码中使用的任何内容（函数，变量等）。

示例：render_template("main.html", pretty_date=pretty_date)

如何从app.py上的HTML模板调用app.py中定义的函数

1 个答案: