class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#LUCI.LuciFit.Fit.sigma_constraints" title="Link to this definition"></a></dt>
<dd><p>Set up constraints for sigma values before fitting line
:returns: Dictionary describing constraints</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="LUCI.LuciFit.Fit.vel_constraints">
<span class="sig-name descname"><span class="pre">vel_constraints</span></span><span class="sig-paren">(</span><span class="sig-p