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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_output_str(item, detect_numerics, precision, sign_value):
 """Returns the final string which should be displayed"""

    if detect_numerics:
        item = _convert_to_numeric(item)
    if isinstance(item, float):
        item = round(item, precision)
    try:
        item = '{:{sign}}'.format(item, sign=sign_value)
    except (ValueError, TypeError):
        pass
    return to_unicode(item)