On 27-Aug-11 11:53 AM, Hans Mulder wrote:
On 27/08/11 17:16:51, Colin J. Williams wrote:
What about:
cond= isinstance(left, PyCompare)
and isinstance(right, PyCompare)
and left.complist[-1] is right.complist[0]
py_and= PyCompare(left.complist + right.complist[1:])if cond
else: py_and = PyBooleanAnd(left, right)
Colin W.
That's a syntax error. You need to add parenthesis.
How about:
cond = (
isinstance(left, PyCompare)
and isinstance(right, PyCompare)
and left.complist[-1] is right.complist[0]
}
py_and = (
PyCompare(left.complist + right.complist[1:])
if cond
else PyBooleanAnd(left, right)
)
-- HansM
I like your 11:53 message but suggest indenting the if cond as below to
make it clearer that it, with the preceding line, is all one statement.
Colin W.
#!/usr/bin/env python
z= 1
class PyCompare:
complist = [True, False]
def __init__(self):
pass
left= PyCompare
right= PyCompare
def isinstance(a, b):
return True
def PyBooleanAnd(a, b):
return True
def PyCompare(a):
return False
z=2
def try1():
''' Hans Mulder suggestion 03:50 '''
if (
isinstance(left, PyCompare)
and isinstance(right, PyCompare)
and left.complist[-1] is right.complist[0]
):
py_and = PyCompare(left.complist + right.complist[1:])
else:
py_and = PyBooleanAnd(left, right)
def try2():
''' cjw response - corrected 11:56 '''
cond= (isinstance(left, PyCompare)
and isinstance(right, PyCompare)
and left.complist[-1] is right.complist[0])
py_and= (PyCompare(left.complist + right.complist[1:]) if cond
else PyBooleanAnd(left, right))
def try3():
''' Hans Mulder 11:53 '''
cond = (
isinstance(left, PyCompare)
and isinstance(right, PyCompare)
and left.complist[-1] is right.complist[0]
) # not }
py_and = (
PyCompare(left.complist + right.complist[1:])
if cond
else PyBooleanAnd(left, right)
)
def main():
try1()
try2()
try3()
if __name__ == '__main__':
main()
pass
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