[addendum]
Well, actually, the previous Seq didn't solve all problems. Obvious case of
nested lists. Below a modified version.
denis
class Seq(list):
''' specialized sequence type with improved str
Override list's behaviour that str(list) calls repr instead of
str on items:
print 2.2, [2.2], seq([2.2]) -->
2.2 [2.2000000000000002] [2.2]
'''
def __str__(self):
if len(self) == 0:
return '[]'
text = str(self[0])
for item in self[1:]:
if isinstance(item, list):
item = Seq(item)
# will now call str on nested Seqs
text += " ,%s" %item
return "[%s]" %text
spir a écrit :
Below an illustration of what troubles me a bit.
denis
class Seq(list):
''' specialized sequence type with improved str
Override list's behaviour that list.__str__
calls __repr__ instead of __str__ on items.
???
'''
def __str__(self):
if len(self) == 0:
return '[]'
text = str(self[0])
for item in self[1:]:
text += " ,%s" %item
return "[%s]" %text
print 1.1, repr(1.1)
print [1.1], Seq([1.1])
==>
1.1 1.1000000000000001
[1.1000000000000001] [1.1]
# By the way, I do not understand at all the behaviour of repr on
rounded floats:
x = round(1.1,1)
print x, repr(x), "%s" %x
1.1 1.1000000000000001 1.1
???
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_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
