68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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from io import BytesIO
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import csv
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import codecs
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import importlib
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from django.conf import settings
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#
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# Django compatibility
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#
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def load_tag_library(libname):
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"""
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Load a templatetag library on multiple Django versions.
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Returns None if the library isn't loaded.
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"""
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from django.template.backends.django import get_installed_libraries
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from django.template.library import InvalidTemplateLibrary
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try:
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lib = get_installed_libraries()[libname]
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lib = importlib.import_module(lib).register
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return lib
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except (InvalidTemplateLibrary, KeyError):
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return None
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def get_template_setting(template_key, default=None):
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""" Read template settings """
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templates_var = getattr(settings, 'TEMPLATES', None)
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if templates_var:
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for tdict in templates_var:
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if template_key in tdict:
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return tdict[template_key]
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return default
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class UnicodeWriter:
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"""
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CSV writer which will write rows to CSV file "f",
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which is encoded in the given encoding.
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We are using this custom UnicodeWriter for python versions 2.x
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"""
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def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
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self.queue = BytesIO()
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self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
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self.stream = f
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self.encoder = codecs.getincrementalencoder(encoding)()
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def writerow(self, row):
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self.writer.writerow([s.encode("utf-8") for s in row])
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# Fetch UTF-8 output from the queue ...
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data = self.queue.getvalue()
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data = data.decode("utf-8")
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# ... and reencode it into the target encoding
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data = self.encoder.encode(data)
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# write to the target stream
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self.stream.write(data)
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# empty queue
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self.queue.truncate(0)
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def writerows(self, rows):
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for row in rows:
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self.writerow(row)
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