Lichen

tests/nested_mixed_names.py

934:2989aab1b4f7
7 months ago Paul Boddie Renamed the utf8string class to unicode, eliminating the unicode function. This means that the simple case of merely returning an object if it is already a Unicode object no longer occurs when using the unicode callable, but such behaviour might be better supported with more general customised instantiation functionality.
     1 class C:     2     def c(self):     3         return 1     4      5 class D(C):     6     def d(self):     7         return 3     8      9 a = 4    10 l = []    11     12 def f(x):    13     14     # Test global mutation.    15     16     l.append(x.c())    17     18     # Test function initialisation.    19     20     def g(y, x=x): # x must be introduced as default here    21         if y:    22             x = D()    23         return x.d(), y, a # UnboundLocalError in Python (if y is a false value)    24     25     return g    26     27 # Provide a default instance for a function to be obtained.    28     29 fn = f(C())    30 print l                     # [1]    31 print fn                    # __main__.f.$l0    32 try:    33     print fn(2)             # should fail due to g requiring an object providing d    34 except TypeError:    35     print "fn(2): fn initialised with an inappropriate object"    36     37 try:    38     print fn(0)             # should fail due to g requiring an object providing d    39 except TypeError:    40     print "fn(0): fn initialised with an inappropriate object"    41     42 # Override the default when calling the function.    43     44 print fn(2, D())            # (3, 2, 4)    45 print fn(0, D())            # (3, 0, 4)    46     47 # Provide a more suitable default instance for the function.    48     49 fn = f(D())    50 print l                     # [1, 1]    51 print fn(2)                 # (3, 2, 4)    52 print fn(0)                 # (3, 0, 4)    53 print fn(0, D())            # (3, 0, 4)    54     55 # Override with an unsuitable object even though it would be ignored.    56     57 try:    58     print fn(1, C())    59 except TypeError:    60     print "fn(1, C()): an unsuitable argument was given."    61     62 # Override with an unsuitable object.    63     64 try:    65     print fn(0, C())    66 except TypeError:    67     print "fn(0, C()): an unsuitable argument was given."