使用try：的语法错误，除了用于处理DivideZeroError的for循环内

Question

遍历多个字典，我尝试计算每个字典，sum_allBlocks和sum_allBounds的值的百分比。 然后，我将此数据作为列表添加到新字典中。

每当sum_allBounds中的值之一为零时，有人可以帮助我避免出现ZeroDivideError吗？ 在for循环中添加try：except：时出现语法错误。

#Get Block% by Stand from allstands, add to daily_details as percent_allBlocks

def get_flight_details(stand_data):
    for _key, allstands in stand_data.items():
        daily_details = {}
        divide_allBlocks = ["{0:3.1f}%".format(a / b * 100) for a, b in zip(sum_allBlocks, sum_allBounds)]
        daily_details['percent_allBlocks'] = divide_allBlocks

Answer 1

它不漂亮，但是您可以做到。

def get_flight_details(stand_data):
    for _key, allstands in stand_data.items():
        daily_details = {}
        divide_allBlocks = ["{0:3.1f}%".format(a/b*100 if b!=0 else <PUT A DEFAULT VALUE HERE>) for a, b in zip(sum_allBlocks, sum_allBounds)]
        daily_details['percent_allBlocks'] = divide_allBlocks

Answer 2

我有这个，它似乎也可以工作。

try:
    divide_allBlocks = ["{0:3.1f}%".format(a / b * 100) for a, b in zip(sum_allBlocks, sum_allBounds)]
except ZeroDivisionError:
    divide_allBlocks = [0.0 for a, b in zip(sum_allBlocks, sum_allBounds)]
daily_details['percent_allBlocks'] = divide_allBlocks