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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 fix_desc(desc, units=None):
 """Clean up description column."""

    full_desc = desc.strip()
    if units and units != 'N/A':
        if full_desc:
            full_desc += ' (' + units + ')'
        else:
            full_desc = units
    return full_desc