Prompt component extract invalid input variable

[yangxikun]

Bug Description

Reproduction

Prompt Template value:

Generate {num} randomly json data.

Output format:
```
[
	{{
	    "name": "mike",
	    "age": 27
	}}
]
```

Expected behavior

	{{
	    "name": "mike",
	    "age": 27
	}}

Should not consider as a variable.

Who can help?

No response

Operating System

mac

Langflow Version

main

Python Version

3.12

Screenshot

No response

Flow File

No response

[dosubot]

To address the issue with the prompt component extracting input variables incorrectly when using JSON-like syntax, you can utilize the _fix_variable function from the api_utils.py file. This function is designed to handle and correct input variables that contain invalid characters or formats.

Here's a brief guide on how to use the _fix_variable function to resolve this issue:

1. Identify Invalid Characters: The function will remove any invalid characters defined in _INVALID_CHARACTERS, such as spaces, commas, and brackets, from the input variables.

2. Correct JSON-like Syntax: The function ensures that JSON-like variables are correctly identified and processed by temporarily replacing {{ and }} to avoid treating them as invalid during processing.

3. Example Usage:

   def fix_input_variable(var):
       invalid_chars = []
       wrong_variables = []
       fixed_var, invalid_chars, wrong_variables = _fix_variable(var, invalid_chars, wrong_variables)
       return fixed_var, invalid_chars, wrong_variables
   
   # Example usage
   input_var = "1invalid_var_name"
   fixed_var, invalid_chars, wrong_variables = fix_input_variable(input_var)
   
   print("Fixed Variable:", fixed_var)
   print("Invalid Characters:", invalid_chars)
   print("Wrong Variables:", wrong_variables)

By using this function, you can ensure that the JSON-like syntax in your prompt is not mistakenly treated as a variable, thus preventing the error you encountered ^[1].

To continue talking to Dosu, mention @dosu.

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