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62 lines
2.2 KiB
62 lines
2.2 KiB
import datetime
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from decimal import Decimal
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import types
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import six
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def is_protected_type(obj):
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"""Determine if the object instance is of a protected type.
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Objects of protected types are preserved as-is when passed to
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force_unicode(strings_only=True).
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"""
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return isinstance(obj, (
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six.integer_types +
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(types.NoneType,
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datetime.datetime, datetime.date, datetime.time,
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float, Decimal))
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)
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def force_unicode(s, encoding='utf-8', strings_only=False, errors='strict'):
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"""
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Similar to smart_text, except that lazy instances are resolved to
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strings, rather than kept as lazy objects.
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If strings_only is True, don't convert (some) non-string-like objects.
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"""
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# Handle the common case first, saves 30-40% when s is an instance of
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# six.text_type. This function gets called often in that setting.
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if isinstance(s, six.text_type):
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return s
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if strings_only and is_protected_type(s):
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return s
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try:
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if not isinstance(s, six.string_types):
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if hasattr(s, '__unicode__'):
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s = s.__unicode__()
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else:
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if six.PY3:
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if isinstance(s, bytes):
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s = six.text_type(s, encoding, errors)
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else:
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s = six.text_type(s)
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else:
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s = six.text_type(bytes(s), encoding, errors)
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else:
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# Note: We use .decode() here, instead of six.text_type(s,
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# encoding, errors), so that if s is a SafeBytes, it ends up being
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# a SafeText at the end.
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s = s.decode(encoding, errors)
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except UnicodeDecodeError as e:
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if not isinstance(s, Exception):
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raise UnicodeDecodeError(*e.args)
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else:
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# If we get to here, the caller has passed in an Exception
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# subclass populated with non-ASCII bytestring data without a
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# working unicode method. Try to handle this without raising a
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# further exception by individually forcing the exception args
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# to unicode.
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s = ' '.join([force_unicode(arg, encoding, strings_only,
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errors) for arg in s])
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return s
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