我正在尝试解析pl下面的 plist ，能够解析其中的键，["IOKitPersonalities"]["UART"]["ProductFWMapping"]但是无法打印相应的Firmware值并遇到以下错误？如何打印所有固件值，我还有下面的预期输出？
pl = {'IOKitPersonalities': {'UART': {'ProductFWMapping': {'D321': {'Firmware': 'C-4377__s-B2/aladdink.trx'}, 'J318': {'Firmware': 'C-4377__s-B2/monstrob.trx'}, 'D331': {'Firmware': 'C-4377__s-B2/geniek.trx'}}}}, 'NSHumanReadableCopyright': u'Copyright \xa9 2013 Company Inc. All rights reserved.'}
for hw in pl["IOKitPersonalities"]["UART"]["ProductFWMapping"]:
print hw
for hw in pl["IOKitPersonalities"]["UART"]["ProductFWMapping"]:
print hw['Firmware']
错误：-
print hw['Firmware']
TypeError: string indices must be integers, not str
预期输出：-
['D321','J318','D331']
['C-4377__s-B2/aladdink.trx','C-4377__s-B2/monstrob.trx','C-4377__s-B2/geniek.trx']
hw 只是关键。它应该是
for hw in pl["IOKitPersonalities"]["UART"]["ProductFWMapping"]:
print pl["IOKitPersonalities"]["UART"]["ProductFWMapping"][hw]['Firmware']
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我来说两句