5. Miscellaneous Services
The modules described in this chapter provide miscellaneous services
that are available in all Python versions.  Here's an overview:
- math
 - -- Mathematical functions (sin() etc.).
 - cmath
 - -- Mathematical functions for complex numbers.
 - whrandom
 - -- Floating point pseudo-random number generator.
 - random
 - -- Generate pseudo-random numbers with various common distributions.
 - array
 - -- Efficient arrays of uniformly typed numeric values.
 - fileinput
 - -- Perl-like iteration over lines from multiple input streams, with
``save in place'' capability.
 
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