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Batuhan Osman TASKAYA
cpython
Commits
a70b1914
Kaydet (Commit)
a70b1914
authored
Nis 22, 2003
tarafından
Alex Martelli
Dosyalara gözat
Seçenekler
Dosyalara Gözat
İndir
Eposta Yamaları
Sade Fark
Adding new built-in function sum, with docs and tests.
üst
060641d5
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5 changed files
with
98 additions
and
1 deletion
+98
-1
libfuncs.tex
Doc/lib/libfuncs.tex
+8
-0
tut.tex
Doc/tut/tut.tex
+4
-1
test_builtin.py
Lib/test/test_builtin.py
+21
-0
NEWS
Misc/NEWS
+4
-0
bltinmodule.c
Python/bltinmodule.c
+61
-0
No files found.
Doc/lib/libfuncs.tex
Dosyayı görüntüle @
a70b1914
...
@@ -897,6 +897,14 @@ class C:
...
@@ -897,6 +897,14 @@ class C:
\versionadded
{
2.2
}
\versionadded
{
2.2
}
\end{funcdesc}
\end{funcdesc}
\begin{funcdesc}
{
sum
}{
sequence
\optional
{
start=0
}}
Sums up the items of a
\var
{
sequence
}
, from left to right, and returns
the total. The
\var
{
sequence
}
's items are normally numbers, and are
not allowed to be strings. The fast, correct way to join up a
sequence of strings is by calling
\code
{
''.join(
\var
{
sequence
}
)
}
.
\versionadded
{
2.3
}
\end{funcdesc}
\begin{funcdesc}
{
super
}{
type
\optional
{
object-or-type
}}
\begin{funcdesc}
{
super
}{
type
\optional
{
object-or-type
}}
Return the superclass of
\var
{
type
}
. If the second argument is omitted
Return the superclass of
\var
{
type
}
. If the second argument is omitted
the super object returned is unbound. If the second argument is an
the super object returned is unbound. If the second argument is an
...
...
Doc/tut/tut.tex
Dosyayı görüntüle @
a70b1914
...
@@ -1819,6 +1819,9 @@ item, then to the result and the next item, and so on. For example,
...
@@ -1819,6 +1819,9 @@ item, then to the result and the next item, and so on. For example,
0
0
\end{verbatim}
\end{verbatim}
Don't use this example's definition of
\code
{
sum
}
: since summing numbers
is such a common need, a built-in function
\code
{
sum(
\var
{
sequence
}
)
}
is
already provided, and works exactly like this
\versionadded
{
2,3
}
.
\subsection
{
List Comprehensions
}
\subsection
{
List Comprehensions
}
...
@@ -2502,7 +2505,7 @@ standard module \module{__builtin__}\refbimodindex{__builtin__}:
...
@@ -2502,7 +2505,7 @@ standard module \module{__builtin__}\refbimodindex{__builtin__}:
'len', 'license', 'list', 'locals', 'long', 'map', 'max', 'min',
'len', 'license', 'list', 'locals', 'long', 'map', 'max', 'min',
'object', 'oct', 'open', 'ord', 'pow', 'property', 'quit',
'object', 'oct', 'open', 'ord', 'pow', 'property', 'quit',
'range', 'raw
_
input', 'reduce', 'reload', 'repr', 'round',
'range', 'raw
_
input', 'reduce', 'reload', 'repr', 'round',
'setattr', 'slice', 'staticmethod', 'str', 'string', 'super',
'setattr', 'slice', 'staticmethod', 'str', 'string', 'su
m', 'su
per',
'tuple', 'type', 'unichr', 'unicode', 'vars', 'xrange', 'zip']
'tuple', 'type', 'unichr', 'unicode', 'vars', 'xrange', 'zip']
\end{verbatim}
\end{verbatim}
...
...
Lib/test/test_builtin.py
Dosyayı görüntüle @
a70b1914
...
@@ -1099,6 +1099,27 @@ class BuiltinTest(unittest.TestCase):
...
@@ -1099,6 +1099,27 @@ class BuiltinTest(unittest.TestCase):
a
[
0
]
=
a
a
[
0
]
=
a
self
.
assertEqual
(
str
(
a
),
'{0: {...}}'
)
self
.
assertEqual
(
str
(
a
),
'{0: {...}}'
)
def
test_sum
(
self
):
self
.
assertEqual
(
sum
([]),
0
)
self
.
assertEqual
(
sum
(
range
(
2
,
8
)),
27
)
self
.
assertEqual
(
sum
(
iter
(
range
(
2
,
8
))),
27
)
self
.
assertEqual
(
sum
(
Squares
(
10
)),
285
)
self
.
assertEqual
(
sum
(
iter
(
Squares
(
10
))),
285
)
self
.
assertEqual
(
sum
([[
1
],
[
2
],
[
3
]],
[]),
[
1
,
2
,
3
])
self
.
assertRaises
(
TypeError
,
sum
)
self
.
assertRaises
(
TypeError
,
sum
,
42
)
self
.
assertRaises
(
TypeError
,
sum
,
[
'a'
,
'b'
,
'c'
])
self
.
assertRaises
(
TypeError
,
sum
,
[
'a'
,
'b'
,
'c'
],
''
)
self
.
assertRaises
(
TypeError
,
sum
,
[[
1
],
[
2
],
[
3
]])
self
.
assertRaises
(
TypeError
,
sum
,
[{
2
:
3
}])
self
.
assertRaises
(
TypeError
,
sum
,
[{
2
:
3
}]
*
2
,
{
2
:
3
})
class
BadSeq
:
def
__getitem__
(
self
,
index
):
raise
ValueError
self
.
assertRaises
(
ValueError
,
sum
,
BadSeq
())
def
test_tuple
(
self
):
def
test_tuple
(
self
):
self
.
assertEqual
(
tuple
(()),
())
self
.
assertEqual
(
tuple
(()),
())
t0_3
=
(
0
,
1
,
2
,
3
)
t0_3
=
(
0
,
1
,
2
,
3
)
...
...
Misc/NEWS
Dosyayı görüntüle @
a70b1914
...
@@ -12,6 +12,10 @@ What's New in Python 2.3 beta 1?
...
@@ -12,6 +12,10 @@ What's New in Python 2.3 beta 1?
Core and builtins
Core and builtins
-----------------
-----------------
- New builtin function sum(seq, start=0) returns the sum of all the
items in iterable object seq, plus start (items are normally numbers,
and cannot be strings).
- bool() called without arguments now returns False rather than
- bool() called without arguments now returns False rather than
raising an exception. This is consistent with calling the
raising an exception. This is consistent with calling the
constructors for the other builtin types -- called without argument
constructors for the other builtin types -- called without argument
...
...
Python/bltinmodule.c
Dosyayı görüntüle @
a70b1914
...
@@ -1798,6 +1798,66 @@ PyDoc_STRVAR(vars_doc,
...
@@ -1798,6 +1798,66 @@ PyDoc_STRVAR(vars_doc,
Without arguments, equivalent to locals().
\n
\
Without arguments, equivalent to locals().
\n
\
With an argument, equivalent to object.__dict__."
);
With an argument, equivalent to object.__dict__."
);
static
PyObject
*
builtin_sum
(
PyObject
*
self
,
PyObject
*
args
)
{
PyObject
*
seq
;
PyObject
*
result
=
NULL
;
PyObject
*
temp
,
*
item
,
*
iter
;
if
(
!
PyArg_ParseTuple
(
args
,
"O|O:sum"
,
&
seq
,
&
result
))
return
NULL
;
iter
=
PyObject_GetIter
(
seq
);
if
(
iter
==
NULL
)
return
NULL
;
if
(
result
==
NULL
)
{
result
=
PyInt_FromLong
(
0
);
if
(
result
==
NULL
)
{
Py_DECREF
(
iter
);
return
NULL
;
}
}
else
{
/* reject string values for 'start' parameter */
if
(
PyObject_TypeCheck
(
result
,
&
PyBaseString_Type
))
{
PyErr_SetString
(
PyExc_TypeError
,
"can't sum strings [use ''.join(seq) instead]"
);
Py_DECREF
(
result
);
Py_DECREF
(
iter
);
return
NULL
;
}
}
for
(;;)
{
item
=
PyIter_Next
(
iter
);
if
(
item
==
NULL
)
{
/* error, or end-of-sequence */
if
(
PyErr_Occurred
())
{
Py_DECREF
(
result
);
result
=
NULL
;
}
break
;
}
temp
=
PyNumber_Add
(
result
,
item
);
Py_DECREF
(
result
);
Py_DECREF
(
item
);
result
=
temp
;
if
(
result
==
NULL
)
break
;
}
Py_DECREF
(
iter
);
return
result
;
}
PyDoc_STRVAR
(
sum_doc
,
"sum(sequence, start=0) -> value
\n
\
\n
\
Returns the sum of a sequence of numbers (NOT strings) plus the value
\n
\
of parameter 'start'. When the sequence is empty, returns start."
);
static
PyObject
*
static
PyObject
*
builtin_isinstance
(
PyObject
*
self
,
PyObject
*
args
)
builtin_isinstance
(
PyObject
*
self
,
PyObject
*
args
)
{
{
...
@@ -2001,6 +2061,7 @@ static PyMethodDef builtin_methods[] = {
...
@@ -2001,6 +2061,7 @@ static PyMethodDef builtin_methods[] = {
{
"repr"
,
builtin_repr
,
METH_O
,
repr_doc
},
{
"repr"
,
builtin_repr
,
METH_O
,
repr_doc
},
{
"round"
,
builtin_round
,
METH_VARARGS
,
round_doc
},
{
"round"
,
builtin_round
,
METH_VARARGS
,
round_doc
},
{
"setattr"
,
builtin_setattr
,
METH_VARARGS
,
setattr_doc
},
{
"setattr"
,
builtin_setattr
,
METH_VARARGS
,
setattr_doc
},
{
"sum"
,
builtin_sum
,
METH_VARARGS
,
sum_doc
},
#ifdef Py_USING_UNICODE
#ifdef Py_USING_UNICODE
{
"unichr"
,
builtin_unichr
,
METH_VARARGS
,
unichr_doc
},
{
"unichr"
,
builtin_unichr
,
METH_VARARGS
,
unichr_doc
},
#endif
#endif
...
...
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