Python 使用Jinja2的HTML模板-丢失

我正在尝试使用Jinja2在python中创建一个html模板。我有一个带有“template.html”的templates文件夹，但我不知道如何处理环境或包加载器

我使用easy_python安装了Jinja2，并运行了以下脚本

from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('yourapplication', 'templates'))
template = env.get_template('mytemplate.html')
print template.render()

我得到以下错误，因为我不知道如何定义包/模块。请帮助我，我只想创建一个简单的模板

  File "log_manipulationLL.py", line 291, in <module>
env = Environment(loader=PackageLoader('yourapplication', 'templates'))
 File "/usr/local/lib/python2.7/dist-packages/Jinja2-2.6-py2.7.egg/jinja2/loaders.py",    line 216, in __init__
provider = get_provider(package_name)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 213, in get_provider
__import__(moduleOrReq)
ImportError: No module named yourapplication

文件“log\u operationll.py”，第291行，在
env=Environment（loader=PackageLoader（“您的应用程序”、“模板”））
文件“/usr/local/lib/python2.7/dist packages/Jinja2-2.6-py2.7.egg/Jinja2/loaders.py”，第216行，在__
provider=get\u provider（包名称）
文件“/usr/lib/python2.7/dist packages/pkg_resources.py”，第213行，在get_provider中
__导入（模块错误）
ImportError:没有名为yourapplication的模块

PackageLoader

需要使用常规点语法的实际Python模块。例如，如果您的结构如下所示：

myapp/
  __init__.py
  …
  templates/
    mytemplate.html

from jinja2 import Environment, FileSystemLoader, select_autoescape
env = Environment(
    loader=FileSystemLoader('file/path/'),
    autoescape=select_autoescape(['html', 'xml']),
)

class PackageLoader(BaseLoader):
    """Load templates from python eggs or packages.  It is constructed with
    the name of the python package and the path to the templates in that
    package::

        loader = PackageLoader('mypackage', 'views')

    If the package path is not given, ``'templates'`` is assumed.

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.  Due to the nature
    of eggs it's only possible to reload templates if the package was loaded
    from the file system and not a zip file.
    """

myapp/
  __init__.py
  ...
  templates/
    mytemplate.html

---

您应该使用

myapp

作为模块名称。

我使用以下代码解决了此问题：

 env = Environment(loader=PackageLoader('scriptname', 
                                        templatesPath))

其中，此代码位于文件

scriptname.py

中

---

我不确定我的答案是否相关，但我想也许有人会觉得这个答案有用。如果我错了，请告诉我。

如果您不想要或不需要Python软件包，您可能应该使用，例如：

myapp/
  __init__.py
  …
  templates/
    mytemplate.html

from jinja2 import Environment, FileSystemLoader, select_autoescape
env = Environment(
    loader=FileSystemLoader('file/path/'),
    autoescape=select_autoescape(['html', 'xml']),
)

class PackageLoader(BaseLoader):
    """Load templates from python eggs or packages.  It is constructed with
    the name of the python package and the path to the templates in that
    package::

        loader = PackageLoader('mypackage', 'views')

    If the package path is not given, ``'templates'`` is assumed.

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.  Due to the nature
    of eggs it's only possible to reload templates if the package was loaded
    from the file system and not a zip file.
    """

myapp/
  __init__.py
  ...
  templates/
    mytemplate.html

---

PackageLoader的定义如下：

myapp/
  __init__.py
  …
  templates/
    mytemplate.html

from jinja2 import Environment, FileSystemLoader, select_autoescape
env = Environment(
    loader=FileSystemLoader('file/path/'),
    autoescape=select_autoescape(['html', 'xml']),
)

class PackageLoader(BaseLoader):
    """Load templates from python eggs or packages.  It is constructed with
    the name of the python package and the path to the templates in that
    package::

        loader = PackageLoader('mypackage', 'views')

    If the package path is not given, ``'templates'`` is assumed.

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.  Due to the nature
    of eggs it's only possible to reload templates if the package was loaded
    from the file system and not a zip file.
    """

myapp/
  __init__.py
  ...
  templates/
    mytemplate.html

然后

\uuuu init\uuuu（）

方法如下：

def __init__(self, package_name, package_path='templates',
             encoding='utf-8'):

这让我们注意到这样的结构：

myapp/
  __init__.py
  …
  templates/
    mytemplate.html

from jinja2 import Environment, FileSystemLoader, select_autoescape
env = Environment(
    loader=FileSystemLoader('file/path/'),
    autoescape=select_autoescape(['html', 'xml']),
)

class PackageLoader(BaseLoader):
    """Load templates from python eggs or packages.  It is constructed with
    the name of the python package and the path to the templates in that
    package::

        loader = PackageLoader('mypackage', 'views')

    If the package path is not given, ``'templates'`` is assumed.

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.  Due to the nature
    of eggs it's only possible to reload templates if the package was loaded
    from the file system and not a zip file.
    """

myapp/
  __init__.py
  ...
  templates/
    mytemplate.html

将具有与这两个声明相同的

PackageLoader

实例：

PackageLoader('myapp')
PackageLoader('myapp', 'templates')

因此，如果您是从

myapp/

路径运行，那么您只需要说：

PackageLoader('templates', '')

因此，它将只使用

模板/

作为路径。如果将第二个参数留空，它将尝试在

模板/templates

中查找模板

最后，您可以使用

list\u templates（）

方法检查已加载的内容：

PackageLoader('templates', '').list_templates()

---

包加载器调用

scriptname.py

。如果您在其中初始化包加载器，代码将被再次调用。您必须小心-如果您的代码不是全部在函数/类中，重新导入同一文件可能会重新执行其中的代码，从而导致双模板输出！