| \chapter{Miscellaneous Services} | 
 | \label{misc} | 
 |  | 
 | The modules described in this chapter provide miscellaneous services | 
 | that are available in all Python versions.  Here's an overview: | 
 |  | 
 | \begin{description} | 
 |  | 
 | \item[math] | 
 | --- Mathematical functions (\function{sin()} etc.). | 
 |  | 
 | \item[cmath] | 
 | --- Mathematical functions for complex numbers. | 
 |  | 
 | \item[whrandom] | 
 | --- Floating point pseudo-random number generator. | 
 |  | 
 | \item[random] | 
 | --- Generate pseudo-random numbers with various common distributions. | 
 |  | 
 | \item[rand] | 
 | --- Integer pseudo-random number generator (obsolete). | 
 |  | 
 | \item[array] | 
 | --- Efficient arrays of uniformly typed numeric values. | 
 |  | 
 | \end{description} |