Hi,
Here is a brief example on how to use expy to implement the math module:
(for more details, see http://expy.sf.net/)
"""Python math module by expy-cxpy."""
from expy import *
expymodule(__name__)
#includes, defines, etc.
@prologue
def myprolog():
return """
#include <math.h>
"""
@function(double) #return type: double
def sqrt(x=double): #argument x: double
"""sqrt(x) --> the square root of x."""
return "sqrt(x)" #as an expression
#a more terse way
@function(double)
def sin(x=double):
"""sin(x) --> the sin of x."""
pass #the deduced call: sin(x)
#more functions ...
expymodule(__name__) #end of module
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