docs: def qrplatba(pdf,
               IBAN, castka=None, mena='CZK', splatnost=None, msg=None, KS='0558', VS='', SS=None, IBAN2=None,
               w=36, x=None, y=None, **payment_more):
      """This is the main method which generates the QR platba code.
      pdf - object from: with PDF(<outputfilename>) as pdf:
          (we use wfpdf (which is really minor wrapper),
          we haven't not tested the calling with fpdf directly, but maybe it is easy)
      IBAN..IBAN2 - ACC, AM, CC, DT, MSG, X-KS, X-VS, X-SS, ALT-ACC attributes of payment
      w - width [mm] of the generated image (real width is a little bigger thanks to lines and 'QR platba' label)
      code is printed at current position (if not defined using x,y)
          current position moves to the end of 'QR platba' label
      **payment_more - any other payment attributes (key=value will generate *key:value , '_' in key changes to '-')
      """
      if x is None:
          x = pdf.get_x()
      if y is None:
          y = pdf.get_y()
  
      qr = 'SPD*1.0*ACC:' + IBAN
      if IBAN2:
          qr += '*ALT-ACC:' + IBAN2
      if castka:
          qr += '*AM:'
          try:
              qr += '%.2f' % castka
          except TypeError:
              qr += castka
      if mena:
          qr += '*CC:' + mena
      if splatnost:
          qr += '*DT:'
          try:
              qr += splatnost
          except TypeError:
              qr += date.strftime(splatnost, '%Y%m%d')
      if msg:
          qr += '*MSG:' + msg
      if KS:
          qr += '*X-KS:' + KS
      if VS:
          qr += '*X-VS:' + VS
      if SS:
          qr += '*X-SS:' + SS
      for key in payment_more:
          qr += '*%s:' % key.replace('_', '-') + payment_more[key]
  
      png, pixels = getQRCode(qr)
      # as long as we generate qr code with scale=1 w/pixels is module size in [mm]:
      module_size = 1.0 * w / pixels
      # for the line around we add 1* module_size to sure have good quiet zone
      pdf.image(png, x=x + module_size, y=y + module_size, w=w, type='png')
      os.unlink(png)
  
      pdf.set_font_size(6)
      # pdf.set_font('', style='B')  # we don't set this here
      pllbl = 'QR platba'
      pllbl_w = pdf.get_string_width(pllbl)
      # some positions in next code were corrected (+-module_size) to obtain good result
      pllbl_right = x + pllbl_w + 7 * module_size
      square_size = w + 2 * module_size
      pdf.line(x, y, x + square_size, y)                                        # top
      pdf.line(x, y, x, y + square_size)                                        # left
      pdf.line(x + square_size, y, x + square_size, y + square_size)            # right
      pdf.line(x, y + square_size, x + 2 * module_size, y + square_size)        # bottom before
      pdf.line(pllbl_right, y + square_size, x + square_size, y + square_size)  # bottom after
      pdf.set_xy(x + 3 * module_size, y + square_size)
      pdf.cell(pllbl_w, h=2, txt=pllbl)