Construct the text based on the entered content in the widget.

def process_text(self, array=True):
        """
        Construct the text based on the entered content in the widget.
        """
        if array:
            prefix = 'np.array([['
        else:
            prefix = 'np.matrix([['

        suffix = ']])'
        values = self._widget.text().strip()

        if values != '':
            # cleans repeated spaces
            exp = r'(\s*)' + ROW_SEPARATOR + r'(\s*)'
            values = re.sub(exp, ROW_SEPARATOR, values)
            values = re.sub(r"\s+", " ", values)
            values = re.sub(r"]$", "", values)
            values = re.sub(r"^\[", "", values)
            values = re.sub(ROW_SEPARATOR + r'*$', '', values)

            # replaces spaces by commas
            values = values.replace(' ',  ELEMENT_SEPARATOR)

            # iterate to find number of rows and columns
            new_values = []
            rows = values.split(ROW_SEPARATOR)
            nrows = len(rows)
            ncols = []
            for row in rows:
                new_row = []
                elements = row.split(ELEMENT_SEPARATOR)
                ncols.append(len(elements))
                for e in elements:
                    num = e

                    # replaces not defined values
                    if num in NAN_VALUES:
                        num = 'np.nan'

                    # Convert numbers to floating point
                    if self._force_float:
                        try:
                            num = str(float(e))
                        except:
                            pass
                    new_row.append(num)
                new_values.append(ELEMENT_SEPARATOR.join(new_row))
            new_values = ROW_SEPARATOR.join(new_values)
            values = new_values

            # Check validity
            if len(set(ncols)) == 1:
                self._valid = True
            else:
                self._valid = False

            # Single rows are parsed as 1D arrays/matrices
            if nrows == 1:
                prefix = prefix[:-1]
                suffix = suffix.replace("]])", "])")

            # Fix offset
            offset = self._offset
            braces = BRACES.replace(' ', '\n' + ' '*(offset + len(prefix) - 1))

            values = values.replace(ROW_SEPARATOR,  braces)
            text = "{0}{1}{2}".format(prefix, values, suffix)

            self._text = text
        else:
            self._text = ''
        self.update_warning()