Python调用AWS Lambda动态传参失败问题求助

原始场景 #

硬编码函数名和参数时，代码可正常执行：

params = {"value1": "value1-value", "value2": "value2-value", "value3": "value3-value"}
client = boto3.client('lambda')
response = client.invoke(
    FunctionName='MyLambdaFunctionName',
    InvocationType='RequestResponse',
    Payload=json.dumps(params).encode(),
)
pprint.pp(response['Payload'].read())

改为从环境变量获取Lambda函数名、动态构造参数后执行失败，测试代码：

lambdaName = os.getenv('TF_VAR_lambdaName')
value1="value1-value"
value2="value2-value"
value3="value3-value"

data = {"value1": "value1-value", "value2": "value2-value", "value3": "value3-value"}

params = json.dumps(data)
client = boto3.client('lambda')
response = client.invoke(
    FunctionName=lambdaName,
    InvocationType='RequestResponse',
    Payload=json.dumps(params).encode(),
)
pprint.pp(response['Payload'].read())

首次错误信息 #

执行后抛出参数验证错误：

Traceback (most recent call last):   File
"/Users/go/src/github.com/repo/./cleanup/cleanup.py", line 25, in
<module>
    response = client.invoke(   File "/Users/Library/Python/3.9/lib/python/site-packages/botocore/client.py",
line 515, in _api_call
    return self._make_api_call(operation_name, kwargs)   File "/Users/Library/Python/3.9/lib/python/site-packages/botocore/client.py",
line 893, in _make_api_call
    request_dict = self._convert_to_request_dict(   File "/Users/Library/Python/3.9/lib/python/site-packages/botocore/client.py",
line 964, in _convert_to_request_dict
    request_dict = self._serializer.serialize_to_request(   File "/Users/Library/Python/3.9/lib/python/site-packages/botocore/validate.py",
line 381, in serialize_to_request
    raise ParamValidationError(report=report.generate_report()) botocore.exceptions.ParamValidationError: Parameter validation failed:
Invalid type for parameter FunctionName, value: None, type: <class
'NoneType'>, valid types: <class 'str'>

更新后的问题 #

修改参数传递方式，直接使用JSON序列化结果尝试解决问题，却出现新的Lambda执行错误：

{
  "errorType": "ValidationMetadataException",
  "errorMessage": "The argument is null or empty. Provide an argument that is not null or empty, and then try the command again.",
  "stackTrace": [
    "at Amazon.Lambda.PowerShellHost.PowerShellFunctionHost.ExecuteFunction(Stream inputStream, ILambdaContext context)",
    "at lambda_method1(Closure , Stream , ILambdaContext , Stream )",
    "at Amazon.Lambda.RuntimeSupport.Bootstrap.UserCodeLoader.Invoke(Stream lambdaData, ILambdaContext lambdaContext, Stream outputStream) in /src/Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Bootstrap/UserCodeLoader.cs:line 145",
    "at Amazon.Lambda.RuntimeSupport.HandlerWrapper.<>c__DisplayClass8_0.<GetHandlerWrapper>b__0(InvocationRequest invocation) in /src/Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Bootstrap/HandlerWrapper.cs:line 56",
    "at Amazon.Lambda.RuntimeSupport.LambdaBootstrap.InvokeOnceAsync(CancellationToken cancellationToken) in /src/Repo/Libraries/src/Amazon.Lambda.RuntimeSupport/Bootstrap/LambdaBootstrap.cs:line 176"
  ]
}

目前Lambda函数名传入的问题仍未解决，代码已更新。

内容的提问来源于stack exchange，提问作者Maxamis4