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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_current():
 """return current Xresources color theme"""

    global current
    if exists( SETTINGSFILE ):
        f = open( SETTINGSFILE ).read()
        current = re.findall('config[^\s]+.+', f)[1].split('/')[-1]
        return current
    else:
        return "** Not Set **"