mjo/misc.py

   1 """
   2 Stuff that doesn't fit anywhere else.
   3 """
   4
   5 from sage.all import *
   6 from functools import reduce
   7
   8 def legend_latex(obj):
   9     """
  10     Return the LaTeX representation of `obj`, but wrap it in dollar
  11     ($) signs so that we can pass it directly to plot() et al. as a
  12     legend label.
  13     """
  14     return '$%s$' % latex(obj)
  15
  16 def product(factors):
  17     """
  18     Returns the product of the elements in the list `factors`. If the
  19     list is empty, we return 1.
  20
  21     TESTS:
  22
  23     Normal integer multiplication::
  24
  25         sage: product([1,2,3])
  26         6
  27
  28     And with symbolic variables::
  29
  30         sage: x,y,z = var('x,y,z')
  31         sage: product([x,y,z])
  32         x*y*z
  33
  34     """
  35     return reduce(operator.mul, factors, 1)