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robustify UserList constructor -- will now accept any sequence

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add test cases for non-UserList class, tuple, & string
This commit is contained in:
Jeremy Hylton 2000-03-31 00:17:46 +00:00
parent 074c3e62d1
commit 6a973c7118
2 changed files with 19 additions and 5 deletions
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13
Lib/UserList.py
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@ -1,13 +1,16 @@
"""A more or less complete user-defined wrapper around list objects.""" """A more or less complete user-defined wrapper around list objects."""
class UserList: class UserList:
def __init__(self, list=None): def __init__(self, initlist=None):
self.data = [] self.data = []
if list is not None: if initlist is not None:
if type(list) == type(self.data): # XXX should this accept an arbitary sequence?
self.data[:] = list if type(initlist) == type(self.data):
self.data[:] = initlist
elif isinstance(initlist, UserList):
self.data[:] = initlist.data[:]
else: else:
self.data[:] = list.data[:] self.data = list(initlist)
def __repr__(self): return repr(self.data) def __repr__(self): return repr(self.data)
def __cmp__(self, other): def __cmp__(self, other):
if isinstance(other, UserList): if isinstance(other, UserList):

11
Lib/test/test_userlist.py
View file

@ -18,6 +18,17 @@ uu0 = UserList(u0)
uu1 = UserList(u1) uu1 = UserList(u1)
uu2 = UserList(u2) uu2 = UserList(u2)
v = UserList(tuple(u))
class OtherList:
def __init__(self, initlist):
self.__data = initlist
def __len__(self):
return len(self.__data)
def __getitem__(self, i):
return self.__data[i]
v0 = UserList(OtherList(u0))
vv = UserList("this is also a sequence")
# Test __repr__ # Test __repr__
assert str(u0) == str(l0) assert str(u0) == str(l0)