code: def prior_from_config(cp, prior_section='prior'):
      
      # Read variable and static parameters from the config file
      variable_params, _ = distributions.read_params_from_config(
          cp, prior_section=prior_section, vargs_section='variable_params',
          sargs_section='static_params')
      # Read constraints to apply to priors from the config file
      constraints = distributions.read_constraints_from_config(cp)
      # Get PyCBC distribution instances for each variable parameter in the
      # config file
      dists = distributions.read_distributions_from_config(cp, prior_section)
      # construct class that will return draws from the prior
      return distributions.JointDistribution(variable_params, *dists,
                                             **{"constraints": constraints})
docs: Loads a prior distribution from the given config file.
  
      Parameters
      ----------
      cp : pycbc.workflow.WorkflowConfigParser
          The config file to read.
      sections : list of str, optional
          The sections to retrieve the prior from. If ``None`` (the default),
          will look in sections starting with 'prior'.
  
      Returns
      -------
      distributions.JointDistribution
          The prior distribution.