pyqt4 - python pyqt interactive usuage -

-

i use edit functions defining slots while pyqt gui running can debug program without having restart it. example of have is, after importing py file generated pyuic

##-------------------------##  app=qapplication([]) window = qmainwindow() window.show() ui = ui_mainwindow() ui.setupui(window) ##-------------------------## def helloworld():      print "hi"  ui.pushbutton.clicked.connect(helloworld)

now, after starting program can execute commands in console. after running program, redefine helloworld function using console

def helloworld():     print "goodbye"

however, if this, both "hi" , "goodbye" both printed. "goodbye" printed.

i going use feature debug functions, while gui live. using spyder ide python 2.7.6 , pyqt4

edit:

after redefining function, reconnect slot. thereby, clicked action results in executing old function (printing "hi") , new function (printing "goodbye")

redefining function not disconnect original signal , not destroy original function. creates new function same name, preventing access original function not hold reference it. qt has reference, both functions called (i assume connect new function button?)

one way solve explicitly call ui.pushbutton.clicked.disconnect(helloworld) before redefining function.

alternatively, wrap function in another:

def wrap(*args, **kwargs):     return helloworld(*args, **kwargs)  ui.pushbutton.clicked.connect(wrap)

then redefining helloworld have desired effect.


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile: ...
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo...
Read more