小编Ive*_*ion的帖子

而不是在每个刺痛前键入你？

...还有一些文本可以保持stackoverflow的快乐

我正在关注本教程http://flask.pocoo.org/docs/0.10/patterns/wtforms/

这是一个带有宏的 _formhelpers.html 模板示例：

{% macro render_field(field) %}
  <dt>{{ field.label }}
  <dd>{{ field(**kwargs)|safe }}
  {% if field.errors %}
    <ul class=errors>
    {% for error in field.errors %}
      <li>{{ error }}</li>
    {% endfor %}
    </ul>
  {% endif %}
  </dd>
{% endmacro %}

这里的 register.html 模板利用了 _formhelpers.html 模板：

{% from "_formhelpers.html" import render_field %}
<form method=post action="/register">
  <dl>
    {{ render_field(form.username) }}
    {{ render_field(form.email) }}
    {{ render_field(form.password) }}
    {{ render_field(form.confirm) }}
    {{ render_field(form.accept_tos) }}
  </dl>
  <p><input type=submit value=Register>
</form>

它最终生成了一个序列：

<dt><label for="email">Email Address</label> …

我这样做:

timestamp=long('1455873250789')
print(timestamp)
d=datetime.datetime(timestamp)

我明白了:

1455873250789
Traceback (most recent call last):
  File ".../pycharm-5.0.4/helpers/pydev/pydevd.py", line 2411, in <module>
    globals = debugger.run(setup['file'], None, None, is_module)
  File ".../pycharm-5.0.4/helpers/pydev/pydevd.py", line 1802, in run
launch(file, globals, locals)  # execute the script
  File "....py", line ..., in <module>
d=datetime.datetime(timestamp)
OverflowError: signed integer is greater than maximum

为什么？