I don't know why while sending the variable to HTML it is showing UnboundLocalError: local variable 'prdct' referenced before assignment.

When I don't pass any values from render_template() method then the code is running fine. Also the output that I'm printing using print(prdct) is also working fine.

Following is my code:

CodePudding user response：

Your issue is that if predict.py, whatever function is in there, gets called with an http request other than POST, the prdct variable is undefined.

You have two options:

1. Define prdct = None at a higher scope than your POST method condition

2. Move that specific return statement inside your POST method condition block

CodePudding user response：

Your code does not create prdct in all cases when executing the function. Only when you are entering this with request.Method = "POST" it will work.

You cannot return something unconditionally that may not have been created:

def test():
    if False:
        k = 42

    return k


test()

will throw the a different error your code - the reasons are similar.

The if condition is not met, k = 42 is never created - so you cannot return it in all possible cases.