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|
Add support for Python 3.x
Taken from https://github.com/mitsuhiko/speaklater/pull/3 - commit #62dd88e
--- ./speaklater.py.orig 2010-10-17 15:03:41.000000000 +0000
+++ ./speaklater.py 2013-08-11 11:19:18.000000000 +0000
@@ -12,24 +12,24 @@
Example:
- >>> from speaklater import make_lazy_string
+ >>> from speaklater import make_lazy_string, text_type
>>> sval = u'Hello World'
>>> string = make_lazy_string(lambda: sval)
This lazy string will evaluate to the value of the `sval` variable.
>>> string
- lu'Hello World'
- >>> unicode(string)
- u'Hello World'
- >>> string.upper()
- u'HELLO WORLD'
+ l'Hello World'
+ >>> text_type(string) == u'Hello World'
+ True
+ >>> string.upper() == u'HELLO WORLD'
+ True
If you change the value, the lazy string will change as well:
>>> sval = u'Hallo Welt'
- >>> string.upper()
- u'HALLO WELT'
+ >>> string.upper() == u'HALLO WELT'
+ True
This is especially handy when combined with a thread local and gettext
translations or dicts of translatable strings:
@@ -40,10 +40,10 @@
>>> l.translations = {u'Yes': 'Ja'}
>>> lazy_gettext = make_lazy_gettext(lambda: l.translations.get)
>>> yes = lazy_gettext(u'Yes')
- >>> print yes
+ >>> print(yes)
Ja
>>> l.translations[u'Yes'] = u'Si'
- >>> print yes
+ >>> print(yes)
Si
Lazy strings are no real strings so if you pass this sort of string to
@@ -59,6 +59,9 @@
>>> is_lazy_string(yes)
True
+ New in version 1.4: python >= 3.3 (and also 2.6 and 2.7) support,
+ repr(lazystring) is l"foo" on py2 and py3 - no "u" on py2!
+
New in version 1.2: It's now also possible to pass keyword arguments to
the callback used with `make_lazy_string`.
@@ -66,6 +69,28 @@
:license: BSD, see LICENSE for more details.
"""
+import sys
+
+PY2 = sys.version_info[0] == 2
+_identity = lambda x: x
+
+if not PY2:
+ text_type = str
+ implements_to_string = _identity
+ implements_bool = _identity
+else:
+ text_type = unicode
+
+ def implements_to_string(cls):
+ cls.__unicode__ = cls.__str__
+ cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
+ return cls
+
+ def implements_bool(cls):
+ cls.__nonzero__ = cls.__bool__
+ del cls.__bool__
+ return cls
+
def is_lazy_string(obj):
"""Checks if the given object is a lazy string."""
@@ -87,10 +112,10 @@
>>> lazy_gettext = make_lazy_gettext(lambda: translations.get)
>>> x = lazy_gettext(u'Yes')
>>> x
- lu'Ja'
+ l'Ja'
>>> translations[u'Yes'] = u'Si'
>>> x
- lu'Si'
+ l'Si'
"""
def lazy_gettext(string):
if is_lazy_string(string):
@@ -99,6 +124,8 @@
return lazy_gettext
+@implements_bool
+@implements_to_string
class _LazyString(object):
"""Class for strings created by a function call.
@@ -117,11 +144,11 @@
def __contains__(self, key):
return key in self.value
- def __nonzero__(self):
+ def __bool__(self):
return bool(self.value)
def __dir__(self):
- return dir(unicode)
+ return dir(text_type)
def __iter__(self):
return iter(self.value)
@@ -130,10 +157,7 @@
return len(self.value)
def __str__(self):
- return str(self.value)
-
- def __unicode__(self):
- return unicode(self.value)
+ return text_type(self.value)
def __add__(self, other):
return self.value + other
@@ -190,7 +214,10 @@
def __repr__(self):
try:
- return 'l' + repr(self.value)
+ r = repr(self.value)
+ if PY2 and r.startswith('u'):
+ r = r[1:] # make it look same as on py3
+ return 'l' + r
except Exception:
return '<%s broken>' % self.__class__.__name__
|
