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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 lower_price_channel(data, period, lower_percent):
 """ Lower Price Channel. Formula: lpc = EMA(t) * (1 - lower_percent / 100) """

    catch_errors.check_for_period_error(data, period)

    emas = ema(data, period)
    lower_channel = [val * (1-float(lower_percent)/100) for val in emas]
    return lower_channel