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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 precmd(self, line):
 """Support for help"""

        if line.startswith('help'):
            if not q("`help in key`.q"):
                try:
                    q("\\l help.q")
                except kerr:
                    return '-1"no help available - install help.q"'
        if line == 'help':
            line += "`"
        return line