Changes between Version 65 and Version 66 of DeveloperGuidelines/Py_2_3

Timestamp:

07/07/19 12:03:17 (6 years ago)

Author:

Dominic König

Comment:

--

DeveloperGuidelines/Py_2_3

@@ -268 +268 @@
 This may be a temporary issue - web2py's {{{LazyT}}} does not define a {{{__lt__}}} method which is used for sorting in Python-3, but it does define a {{{__cmp__}}} which is used by Python-2.7 and therefore works.
 
-As a workaround, wrap the {{{lazyT}}} in {{{s3_str}}} when using it as sorting key.
+For the same reason, sorting an array of {{{lazyT}}} does not work in Python-3.
+
+As a workaround, wrap the {{{lazyT}}} in {{{s3_str}}} when sorting or using it as sorting key.
+
+{{{#!python
+a = [T("quick"), T("lazy"), T("fox")]
+# This will crash with a TypeError in Py3:
+a.sort()
+# This will work both in Py2 and Py3:
+a.sort(key=lambda item: s3_str(item))
+}}}