有一段 Python 代码在 zope 3 zcml 环境中运行良好,但需要将其转换为一个独立脚本,以便能够通过类似 tal:content='context/get_tags' 的方式访问。现有的代码如下:
class TagListView(BrowserView):
def getCategories(self):
categories = set()
for cat in self.portal_catalog.uniqueValuesFor('Subject'):
categories.add(cat.lower())
for cat in self.__mapping:
categories.add(cat.lower())
return tuple(sorted(categories))
def getSynonyms(self, category):
r = self.__mapping.get(category)
if r is None:
return ()
return r[0]
def __init__(self, context, request):
self.context = context
self.request = request
self.tool = self.context.portal_categories
def entries(self):
taglist = '(['
for category in self.tool.getCategories():
taglist = taglist + ''' + category + '','
for synonym in self.tool.getSynonyms(category):
if len(synonym) > 0:
taglist = taglist + ''' + synonym + '','
taglist = taglist + '])'
return taglist
这段代码虽然能够在 zope 3 zcml 环境中正常运行,但还需要进行必要的转换才能作为独立脚本运行。
2、解决方案
要将这段代码转换为独立脚本,可以参考以下步骤:
- 首先,需要将
BrowserView类更改为一个普通类,并删除context和request参数。 - 其次,需要将所有依赖于 zope 环境的代码都替换为独立实现,例如使用一个简单的字典来代替
self.portal_catalog。 - 最后,需要将脚本保存为一个可执行文件,并确保脚本具有可执行权限。
以下是一个示例代码,展示了如何将上述代码转换为独立脚本:
class TagListView:
def __init__(self):
self.categories = ['category1', 'category2', 'category3']
self.synonyms = {
'category1': ['synonym1', 'synonym2'],
'category2': ['synonym3', 'synonym4'],
'category3': ['synonym5', 'synonym6'],
}
def getCategories(self):
return tuple(sorted(self.categories))
def getSynonyms(self, category):
return self.synonyms.get(category, ())
def entries(self):
taglist = '(['
for category in self.getCategories():
taglist += ''' + category + '','
for synonym in self.getSynonyms(category):
if len(synonym) > 0:
taglist += ''' + synonym + '','
taglist += '])'
return taglist
if __name__ == '__main__':
view = TagListView()
print(view.entries())
这个脚本可以作为一个独立程序运行,并且不需要依赖任何外部的库或环境。
代码示例
# Assume you have saved the above code as `tag_list.py`.
# To run the script, open a terminal window and navigate to the directory where the script is saved.
# Then, type the following command:
python tag_list.py
# This will print the output of the `entries()` method, which is a list of categories and synonyms in JSON format.