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代码优化

多层循环使用异常跳出​

image-20220726214828063

  • 传统写法
found = False
for row, record in enumerate(table):
    for column, field in enumerate(record):
        for index, item in enumerate(field):
            if item == target:
                found = True
                break
        if found: break
    if found: break
if found: break
  • 使用异常优化
class FoundException(Exception): pass

try:
    for row, record in enumerate(table):
        for column, field in enumerate(record):
            for index, item in enumerate(field):
                if item == target:
                    raise FoundException()
except FoundException:
    # 查找成功
else:
    # 查找失败