New submission from Decorater:
I am wondering so lets say for example if I was to make a json import hook
(code below):
from importlib.machinery import FileFinder
import json
import sys
class ExtensionImporter(object):
"""Base Importer Class."""
def __init__(self, extension_list):
self.extensions = extension_list
def find_loader(self, name, path):
"""Filds some loaders for importing the module."""
self.path = path
return self
def load_module(self, fullname):
if fullname in sys.modules:
return sys.modules[fullname]
return None
class JsonImporter(ExtensionImporter):
"""JSON importer Class."""
def __init__(self):
super(JsonImporter, self).__init__(['.json'])
def load_module(self, fullname):
"""Loads modules found with the extension"""
premodule = super(JsonImporter, self).load_module(fullname)
if premodule is None:
with open(self.path, 'r') as f:
module = json.load(f)
sys.modules[fullname] = module
return module
raise ImportError('Couldn't open path')
extension_importers = [JsonImporter()]
hook_list = []
for importer in extension_importers:
hook_list.append((importer.find_loader, importer.extensions))
sys.path_hooks.insert(0, FileFinder.path_hook(*hook_list))
sys.path_importer_cache.clear()
What if I had those json files in a zip file and used ZipImport on that zip
file would it use that import hook that I shared above if all other import
methods fail to import those json files (obvously they would fail though)?
There should be documentation to explain if it supports user created import
hooks that they create using importlib.
This is because I would be very happy if zipimport supports my own import hook
if any other method of importing files from that zip file fails but mine ends
up working. It also allows people to load up many other formats (provided they
know the format) as if it was a python script. (of if they compressed it in a
custom file like for example a RAR file that WinRAR can create. And yes I would
support a RARImport for rar files.
----------
components: Interpreter Core, Windows
messages: 281850
nosy: Decorater, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Document if zipimport can respect import hooks to load custom files from
zip.
versions: Python 3.4, Python 3.5, Python 3.6, Python 3.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue28816>
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