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pythonmachine-learningpymc3

Error when using PyMC3's Exponential function

I have tried below simple code of PyMC3 in Python 3.7 in order to generate lambda value of exponential function.

But I am getting below error instead.

Could you please let me what the problem is?

Code

import pymc3 as pm

lambda_1 = pm.Exponential('lambda_1', 1)


lambda_2 = pm.Exponential('lambda_2', 1)

Error

TypeError: No model on context stack, which is needed to instantiate distributions. Add variable inside a 'with model:' block, or use the '.dist' syntax for a standalone distribution.

Solution

  • Try this:

    import pymc3 as pm

with pm.Model() as model:
    lambda_1 = pm.Exponential('lambda_1', 1)
    lambda_1 = pm.Exponential('lambda_2', 1)

    I guarantee that it will remove your error! Happy Coding!