[PyQt] Doubt

Thu Oct 24 16:11:50 BST 2019

Hi Dennis,

My apology for the late response, I was out of town.

Thank you for the code. I did run it, but the output gives the output as
depicted in the attached file. Please assist.

Warm regards

Tanya

On Mon, Oct 14, 2019 at 5:09 PM Dennis Jensen <djensen at pgcontrols.com>
wrote:

> Okay first of all what you posted did not execute due to a few typos and
> such so I went and rendered it and added a few adjustments:
>
> import argparse
>
> from sys    import exit   as sysExit
> from pprint import pprint
>
> from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QVBoxLayout
> from PyQt5.QtWidgets import QInputDialog, QLineEdit, QPushButton
>
> # Okay because this Window is so simple there is no reason to
> # sub-class it beyond this however if it were a QMainWindow the
> # Center Widget would have been the main gui implementation and
> # QMainWindow would have been the Controller Class or Main
> # Application that coordinates all the elements between the Gui
> # and any Data Sources it might have
> class TutorialWindow(QWidget):
>   # The Init had a typo
>     def __init__(self):
>         QWidget.__init__(self)
>
>       # Okay its a simple thing but every window ought to
>       # have its own Title
>         self.setWindowTitle('Tutorial Window')
>         self.setGeometry(300, 300, 290, 140)
>
>       # Using the coordinate system is not PyQt as it was
>       # designed to use the Layout system as follows
>         self.btnOpen = QPushButton('Open')
>         self.btnOpen.clicked.connect(self.showDialog)
>
>         self.lneTextName = QLineEdit()
>         self.lneTextName.setPlaceholderText("Enter your name:")
>
>       # This is an invisible horizontal box to put these 2
>       # widgets on the same line and because we want the
>       # Textbox to expand with the window we do not tack a
>       # Stretch object to it
>         HBox = QHBoxLayout()
>         HBox.addWidget(self.btnOpen)
>         HBox.addWidget(self.lneTextName)
>
>       # This is a vertical which is only needed because IOError
>       # wanted to place the previous objects at the top of the
>       # layout so I add the above horizontal box to the vertical
>       # box and follow it with a Stretch object
>         VBox = QVBoxLayout()
>         VBox.addLayout(HBox)
>         VBox.addStretch(1)
>
>       # We could do this cryptically by passing objects into
>       # other objects but I find that doing it explicitly helps
>       # to make things more clean and clear
>         self.setLayout(VBox)
>
>   # This was improperly indented (to far) it is part of the class
>   # but should not be contained within the Init function
>     def showDialog(self):
>         text, result = QInputDialog.getText(self, 'Input Dialog', 'Enter
> your name:')
>         if result == True:
>             self.lneTextName.setText(str(text))
>
> # Just an Argparse example snippet
> def GetCmdLineArgs():
>     Parsr = argparse.ArgumentParser()
>     Parsr.add_argument('echo')
>     ArgVals = Parsr.parse_args()
>
>     return ArgVals
>
> if __name__ == '__main__':
>   # If you are going to do Command Line Arguments I would
>   # strongly suggest you look into Argparse as it is the
>   # recommended command-line standard Python parsing module
>     CmdLneArgs = GetCmdLineArgs()
>     pprint('Command Line Arguements = ' + CmdLneArgs.echo)
>
>   # Using Argparse means QApplication will never import any
>   # command line objects as such we supply an empty list instead
>   # Further what QApplication returns is your Main Application
>   # Event Thread as such I name it accordingly to reduce any
>   # potential confusion about its true purpose
>     MainEvntThred = QApplication([])
>
>   # While this is often the Main Gui it really is the PyQt
>   # Main Application especially if you get into any more
>   # complicated Gui/Application renderings and thus again
>   # I name it accordingly to reduce confusion about its
>   # true purpose
>     MainApp = TutorialWindow()
>     MainApp.show()
>
>     sysExit(MainEvntThred.exec_())
>
> On 10/12/2019 10:02 AM, tanya tanyaradzwa wrote:
>
> Hello everyone,
>
> Referring to the assignment question l asked for your assistance, please
> find my code herein, and attached is the output on my side. Thank you. Tanya
>
> import sys
> from pprint import pprint
> from PyQt5.QtWidgets import QWidget, QPushButton, QInputDialog, QLineEdit,
> QApplication
>
> class TutorialWindow(QWidget):
>     def __init(self):
>         super().__init__()
>         self.btn = QPushButton('Open', self)
>         self.btn.move(0, 20)
>         self.btn.clicked.connect(self.showDialog)
>
>         self.text_name = QLineEdit(self)
>         self.text_name.move(100, 22)
>         self.text_name.setPlaceholderText("Enter your name:")
>
>         self.Geometry(300, 300, 290, 140)
>
>         def showDialog(self):
>             text, result = QInputDialog.getText(self, 'Input Dialog',
> 'Enter your name:')
>             if result ==True:
>                 self.text_name.setText(str(text))
>
> if __name__ == '__main__':
>     app = QApplication(sys.argv)
>     pprint("input parameters  = " + str(sys.argv))
>     tutorial_window = TutorialWindow()
>     tutorial_window.show()
>     sys.exit(app.exec_())
>
>
> On Oct 4, 2019 14:33, "tanya tanyaradzwa" <tanyatanyaradzwa460 at gmail.com>
> wrote:
>
>> Hi Florian,
>>
>> Thank you for your response.
>>
>> I will send to you my code and the output on my side.
>>
>> On Oct 4, 2019 09:56, "Florian Bruhin" <me at the-compiler.org> wrote:
>>
>>> Hey Tanya,
>>>
>>> On Fri, Oct 04, 2019 at 08:50:50AM +0200, tanya tanyaradzwa wrote:
>>> > I am struggling with a school assignment. I have researched all places
>>> > online, but l am failing to bring it all together. Please assist me.
>>> >
>>> > Question:
>>> >
>>> > Create an application using PyQt. The user is prompted for the name of
>>> an
>>> > animal rescue service. This must be displayed in the UI in capital
>>> letters.
>>> > The user is then required to enter a character (letter). This must
>>> also be
>>> > displayed on the UI in capital letters. The application
>>> > must read the name of the animal rescue service as well as the
>>> character
>>> > and then count the number of occurrences of the character in the animal
>>> > rescue service name. The count must be displayed.
>>> >
>>> > Also required:
>>> >
>>> > Error message for incorrect input from user (e.g. no name of animal
>>> rescue
>>> > service).
>>> > Error message of character not found or the character is blank!
>>> >
>>> > May you please assist. Thank you.
>>>
>>> If you have some specific issues, people here would likely be happy to
>>> help.
>>> What do you have so far and where do you run into issues?
>>>
>>> This pretty much boils down to "please do my homework for me", which at
>>> least
>>> I'm not going to do.
>>>
>>> Florian
>>>
>>> --
>>> https://www.qutebrowser.org | me at the-compiler.org (Mail/XMPP)
>>>    GPG: 916E B0C8 FD55 A072 | https://the-compiler.org/pubkey.asc
>>>          I love long mails! | https://email.is-not-s.ms/
>>>
>>
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.comhttps://www.riverbankcomputing.com/mailman/listinfo/pyqt
>
>
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