是否可以在追加之前添加常量字符串？

Question

尝试使用boto3创建仪表板。如何在追加之前添加常量字符串，或者还有其他可用方法吗？

a = [1,2,3,4...]

我需要

[ "AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", "1" ],
[ "AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", "2" ],
[ "AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", "3" ],
[ "AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", "4" ]

我在做

a = [1,2,3]
x = []

for y in a:
    x.append("AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", "y")
print x

Answer 1

您的代码可以像这样固定：

a = [1,2,3]
x = []

for y in a:
    x.append(["AWS/ElasticMapReduce", "MemoryAvailableMB", "JobFlowId", y])
print (x)

请注意，这不会将a中的原始整数转换为字符串...（在循环中使用str(y)来做到这一点）