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Ensure that complex() only accepts a string argument as the first arg,

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and only if there is no second arg.
This closes SF patch #479551.
This commit is contained in:
Fred Drake 2001-12-13 19:52:22 +00:00
parent 733c8935f9
commit 526c7a0101
3 changed files with 26 additions and 4 deletions
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8
Doc/lib/libfuncs.tex
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@ -159,12 +159,14 @@ def my_import(name):
\begin{funcdesc}{complex}{real\optional{, imag}}
Create a complex number with the value \var{real} + \var{imag}*j or
convert a string or number to a complex number.
convert a string or number to a complex number. If the first
parameter is a string, it will be interpreted as a complex number
and the function must be called without a second parameter. The
second parameter can never be a string.
Each argument may be any numeric type (including complex).
If \var{imag} is omitted, it defaults to zero and the function
serves as a numeric conversion function like \function{int()},
\function{long()} and \function{float()}; in this case it also
accepts a string argument which should be a valid complex number.
\function{long()} and \function{float()}.
\end{funcdesc}
\begin{funcdesc}{delattr}{object, name}

8
Lib/test/test_b1.py
View file

@ -122,6 +122,14 @@ def __call__(self): pass
if complex(0.0, 3.14j) != -3.14+0j: raise TestFailed, 'complex(0.0, 3.14j)'
if complex(0j, 3.14) != 3.14j: raise TestFailed, 'complex(0j, 3.14)'
if complex(0.0, 3.14) != 3.14j: raise TestFailed, 'complex(0.0, 3.14)'
if complex("1") != 1+0j: raise TestFailed, 'complex("1")'
if complex("1j") != 1j: raise TestFailed, 'complex("1j")'
try: complex("1", "1")
except TypeError: pass
else: raise TestFailed, 'complex("1", "1")'
try: complex(1, "1")
except TypeError: pass
else: raise TestFailed, 'complex(1, "1")'
if complex(" 3.14+J ") != 3.14+1j: raise TestFailed, 'complex(" 3.14+J )"'
if have_unicode:
if complex(unicode(" 3.14+J ")) != 3.14+1j:

14
Objects/complexobject.c
View file

@ -806,8 +806,20 @@ complex_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|OO:complex", kwlist,
&r, &i))
return NULL;
if (PyString_Check(r) || PyUnicode_Check(r))
if (PyString_Check(r) || PyUnicode_Check(r)) {
if (i != NULL) {
PyErr_SetString(PyExc_TypeError,
"complex() can't take second arg"
" if first is a string");
return NULL;
}
return complex_subtype_from_string(type, r);
}
if (i != NULL && (PyString_Check(i) || PyUnicode_Check(i))) {
PyErr_SetString(PyExc_TypeError,
"complex() second arg can't be a string");
return NULL;
}
nbr = r->ob_type->tp_as_number;
if (i != NULL)