Hello,
I've (re?)-discovered a bug in IDLE call-tips.
If you define a function like:
>>> def f(x=''):
pass
Idle displays the following calltip: (x=)
Likewise for
>>> def g(x='abc'):
pass
the calltip is (x=abc)
for
>>> def h(x=(1,2,3)):
pass
the calltip remains empty.
I submit a quick patch which shows the reason for this and repairs it.
May be you'll find a better or more universal or more beautiful one. Take
it as a suggestion directing in the (hopefully) right direction.
It's the function get_arg_text() in CallTips.py, which has to be
changed, e.g. in the following way:
def get_arg_text(ob):
"Get a string describing the arguments for the given object"
#### --- add helper function stringify --- ####
def stringify(t):
if isinstance(t,tuple):
return str(t)
elif isinstance(t,str):
return "'%s'" % t
else:
return t
argText = ""
if ob is not None:
argOffset = 0
if type(ob)==types.ClassType:
# Look for the highest __init__ in the class chain.
fob = _find_constructor(ob)
if fob is None:
fob = lambda: None
else:
argOffset = 1
elif type(ob)==types.MethodType:
# bit of a hack for methods - turn it into a function
# but we drop the "self" param.
fob = ob.im_func
argOffset = 1
else:
fob = ob
# Try and build one for Python defined functions
if type(fob) in [types.FunctionType, types.LambdaType]:
try:
realArgs =
ob.func_code.co_varnames[argOffset:fob.func_code.co_argcount]
defaults = fob.func_defaults or []
#### --- ... and use it here --- ####
defaults = list(map(lambda name: "=%s" % stringify(name),
defaults))
defaults = [""] * (len(realArgs)-len(defaults)) + defaults
items = map(lambda arg, dflt: arg+dflt, realArgs, defaults)
if fob.func_code.co_flags & 0x4:
items.append("...")
if fob.func_code.co_flags & 0x8:
items.append("***")
argText = ", ".join(items)
argText = "(%s)" % argText
except:
pass
# See if we can use the docstring
doc = getattr(ob, "__doc__", "")
if doc:
doc = doc.lstrip()
pos = doc.find("\n")
if pos < 0 or pos > 70:
pos = 70
if argText:
argText += "\n"
argText += doc[:pos]
return argText
(Attention: possibly strange linebreaks caused by email client)
If the bug has been corrected already, please ignore this message.
If this is the wrong place to submit a patch like this, please direct me
to the right one.
I've read that there is an alpha release of IDLE v1.2. Where can I get it?
Regards,
Gregor Lingl
--
Gregor Lingl
Reisnerstrasse 3/19
A-1030 Wien
Telefon: +43 1 713 33 98
Mobil: +43 664 140 35 27
Website: python4kids.net
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