from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys

def main():

    app = QApplication (sys.argv)
    browser = QTextBrowser()

    browser.setFixedSize(500,500)
    browser.document().setDefaultStyleSheet('p{font-size:12px;} div{left-margin:20px; top-margin:20px;}')
    ftext = '<div><h3><b></b></h3><p>akak</p><p>iuuo</p></div>'
    browser.setWindowTitle("QTextBrowser HTML File Input")
    self.browser.setHtml(ftext)
    self.browser.setFrameStyle(QFrame.NoFrame)
    browser.show()

    sys.exit(app.exec_())

if __name__ == '__main__':
    main()