ValueError object is not iterable / vars argument must have __dict__ attribute

[rodageve]

Bug Description

The following error is seen with Langflow 1.0.16:

ValueError: [TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have dict attribute')]

This issue leads to failing LF workflows.

2024-09-04 15:05:44.113 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | └ ValueError([TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ a...
-- | -- | -- | -- | -- | --
2024-09-04 15:05:44.113 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | │ │ │ │ └ ExceptionGroup('unhandled errors in a TaskGroup', [ValueError([TypeError("'builtin_function_or_method' object is not iterable...
2024-09-04 15:05:44.113 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | └ ValueError([TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ a...
2024-09-04 15:05:44.113 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | │ │ │ │ └ ExceptionGroup('unhandled errors in a TaskGroup', [ValueError([TypeError("'builtin_function_or_method' object is not iterable...
2024-09-04 15:05:44.112 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | TypeError: 'builtin_function_or_method' object is not iterable
2024-09-04 15:05:44.085 | error | ERROR | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | 2024-09-04 19:05:44.085 ERROR main.py 178 exception_handler unhandled error: [TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ attribute')]
2024-09-04 15:05:39.180 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | ValueError: [TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ attribute')]
2024-09-04 15:05:39.180 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | └ [TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ attribute')]
2024-09-04 15:05:39.180 |   |   | us-east-2 | 1858b63c-4888-4066-8812-8aa1b14328df | └ ValueError([TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ a...

Reproduction

1. Refer to Astra Production customers / with large workflows

Expected behavior

This error should not occur.

Who can help?

@nicoloboschi @zzzming @ogabrielluiz

Operating System

Astra Docker Image / 1.0.16.post4

Langflow Version

1.0.16.post4

Python Version

3.11

Screenshot

No response

Flow File

No response

[dosubot[bot]]

The error you're encountering in Langflow 1.0.16 is related to the __dict__ attribute and iterable objects. This issue might be influenced by recent changes in the Data class in src/backend/base/langflow/schema/data.py, which has custom implementations for attribute access and manipulation. These custom implementations can interfere with the default behavior of the __dict__ attribute and iterable operations ^[1].

Additionally, the SequentialTask and HierarchicalTask classes in src/backend/base/langflow/base/agents/crewai/tasks.py handle task groups and task execution, which might be relevant to the reported error ^[2].

To address this issue, you might want to review the custom attribute access methods in the Data class and ensure that objects passed around in workflows have the necessary __dict__ attribute or are properly iterable.

To continue talking to Dosu, mention @dosu.

[nicoloboschi]

@rodageve please add steps to reproduce or more stack trace (if any) otherwise it's impossible to find the root cause, and re-open the issue.