title: python declaration of constant beginning with number
body: <p>I have a python module with definitions of constants. They look like so:</p>
  
  <pre><code>30KHZ = 0b000
  125KHZ = 0b001
  250KHZ = 0b010
  1MHZ = 0b011
  </code></pre>
  
  <p>Obviously, these are not allowed names. One way of to deal with this is to prepend names with something. Names like <code>_30KHZ</code> look nice, but they mess with static analyzers. Names like <code>S_30KHZ</code> or <code>F30KHZ</code> are allowed, but they look awkward and the meaning of the <code>S_</code> or <code>F</code> may be unclear.
  Another way is to rotate the name like so: <code>KHZ30</code>. But is doesn't look good either.</p>
  
  <p>How to name such constants to make their meaning obvious to the user?</p>