python - PySide Signal with Argument -

-

qgroupbox has signal clicked has optional checked parameter. suppose i'm trying connect slot inside of class so: box.clicked.connect(self.func), declaration of slot must def func(self, checked), func being called 1 argument. how desired behaviour of func being called both self , optional checked arguments?

the behaviour of signals optional default parameters differs between pyqt , pyside. in pyqt, default parameter always sent, in pyside have explicitly request it:

    box.clicked[bool].connect(self.func)

this better design choice, say, pyqt behaviour can lead bugs if forget default value sent though didn't ask it. case of explicit being better implicit...


Comments

Post a Comment

Popular posts from this blog

javascript - Feed FileReader from server side files -

-
i´m starting customize/improve old audio editor project. can import audio tracks canvas via drag&drop computer. thing use audio tracks stored in server clicking on list of available tracks... instead of use <input type="file"> tags. how can read server side files filereader?ajax perhaps? in advance. this code file reader: player.prototype.loadfile = function(file, el) { //console.log(file); var reader = new filereader, filetypes = ['audio/mpeg', 'audio/mp3', 'audio/wave', 'audio/wav'], = this; if (filetypes.indexof(file.type) < 0) { throw('unsupported file format!'); } reader.onloadend = function(e) { if (e.target.readystate == filereader.done) { // done == 2 $('.progress').children().width('100%'); var onsuccess = function(audiobuffer) { $(el).trigger('audiee:fileloaded', [audiobuffer, file]); ...
Read more

python - Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] error -

-
Image
i getting same error when python manage.py runserver. there no such error when have ubuntu 15.10. got started when upgraded ubuntu 16.04. question might duplicate have tried solution provided question have applied command dpkg --configure -a, have done apt-get update,upgrade,dist-upgrade, clean, -f install. have reinstalled python2.7 , python3 no success though. here screenshot while trying run django application i got after re-installing python please me? bashrc file # ~/.bashrc: executed bash(1) non-login shells. # see /usr/share/doc/bash/examples/startup-files (in package bash-doc) # examples # if not running interactively, don't case $- in *i*) ;; *) return;; esac export pythonhome="/usr/bin/python" echo $virtualenvwrapper_python echo 'tushant' # don't put duplicate lines or lines starting space in history. # see bash(1) more options histcontrol=ignoreboth # append history file, don't overwrite shopt -s histappend # setting h...
Read more

oracle - pls-00402 alias required in select list of cursor to avoid duplicate column names -

-
my cursor : select xzis.msisdn msisdn, xzis.in_account_number in_account_number xxobw_zte_in_sync xzis not exists (select 1 hz_contact_points hcp, hz_cust_accounts hca hcp.owner_table_id = hca.party_id , hcp.owner_table_name = 'hz_parties' , hcp.phone_number = substr (xzis.msisdn, -8) , nvl (hca.attribute12, 'nil') = xzis.in_account_number); i have given alias columns, still facing issue. suggestions? it's cursor. 1 has no such problems. problem is, when you're joining 2 tables, or apply wrong aliases in subselect, cursor may @ end return 2 columns same name/alias. the problem not need alias, no 2 columns can have same alias (the name counting alias, when no alias given). apparently has happened, far can tell, it's ...
Read more