human
Solve the following python programming problem given the following code:
def _create_stylesheet(self) : 
    t2n = self.ttype2name = { 
        Token : '', 
} 
    c2d = self.cmd2def = { 
        
} 
    cp = self.commandprefix 
    def rgbcolor(col) : 
        if col : 
            return ','.join ([('%.2f' % (int ((col [i] + col [(i + 1)]), 16) / 255.0)) for i in (0, 2, 4)]) 
else : 
            return '1,1,1' 
for (ttype, ndef) in self.style : 
        name = _get_ttype_name (ttype) 
        cmndef = '' 
        if ndef ['bold'] : 
            cmndef += '\\let\\$$@bf=\\textbf' 
if self ['italic'] : 
            cmndef += '\\let\\$$@it=\\textit' 
if ndef ['underline'] : 
            cmndef += '\\let\\$$@ul=\\underline' 
if ndef ['roman'] : 
            cmndef += '\\let\\$$@ff=\\textrm' 
if ndef ['sans'] : 
            cmndef += '\\let\\$$@ff=\\textsf' 
if ndef ['mono'] : 
            cmndef += '\\let\\$$@ff=\\textsf' 
if ndef ['color'] : 
            cmndef += ('\\def\\$$@tc##1{\\textcolor[rgb]{%s}{##1}}' % rgbcolor (ndef ['color'])) 
if ndef ['border'] : 
            cmndef += ('\\def\\$$@bc##1{\\fcolorbox[rgb]{%s}{%s}{##1}}' % (rgbcolor (ndef ['border']), rgbcolor (ndef ['bgcolor']))) 
else : 
            if ndef ['bgcolor'] : 
                cmndef += ('\\def\\$$@bc##1{\\colorbox[rgb]{%s}{##1}}' % rgbcolor (ndef ['bgcolor'])) 
if (cmndef == '') : 
            continue 
cmndef = cmndef.replace ('$$', cp) 
        t2n [ttype] = name 
        c2d [name] = cmndef 

    
    

    Fix the buggy line: if self ['italic'] :
assistant
#Here is Python program to fix the buggy line: if self ['italic'] :
.

if ndef ['italic'] :