Converting SQL data into a QTextDocument and then outputting a pdf

Question

I am trying to add a way to export data from an sqlite3 database into a pdf document. In the book rapid gui programming with python and Qt it says that I can export QTextDocuments as pdf files. However it need to be in the form of a QTextDocument. At the moment I have been trying to get a string of headers for the table into a pdf document as a test however when it is run idle just restarts.

    import sqlite3
    from PyQt5 import QtWidgets, QtCore, QtGui
    class Report(QtWidgets.QWidget):
        def __init__(self,text):
            super(Report,self).__init__()
            self.textArea = QTextEdit(self)
            self.cursor = QTextCursor(self.textArea.document())
            self.cursor.insertText(text)

    def createTextReport(fileName):
        headings = ('|%10s|'%'AssetID' + '|%40s|'%'Description' + '|%40s|'%'Room Description' + '|%5s|'%'Labelled' + '|%10s|'%'Condition')
        report = Report(headings)
        printer = QPrinter()
        printer.setPageSize(QPrinter.Letter)
        printer.setOutputFormat(QPrinter.PdfFormat)
        printer.setOutputFileName('C:/Users/Luke/Documents/A-Level-Work/A2/Computing/COMP 4/Program/report.pdf')
        report.print_(printer)


    fileName = 'C:/Users/Luke/Documents/A-Level-Work/A2/Computing/COMP 4/Program/test_database.db'

    createTextReport(fileName)

I am wondering where i am going wrong and also is there a simple way of getting data from an SQL query into a QTextDocument format as a table so i don't have to format it manually. Please make explanations in simple terms as my programming knowledge is very limited.

Answer 1

If you just have tuples from your sqlite3 module, then you can format your data using something like this:

myText = ''

for entry in conn.execute('SOME SQL QUERY'):
    myText += '|{:10s}| AssetID |{:40s}| Description |{:40s}| Room Description |{:5s}| Labelled |{:10s}| Condition'.format(*entry)
    myText += '\n'

Then you can feed this text into your Report() object.

Used this post.