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# examples/increment_example.py
# from weave import ext_tools
# use the following so that development version is used.
from __future__ import absolute_import, print_function
import sys
sys.path.insert(0,'..')
import ext_tools
def build_increment_ext():
""" Build a simple extension with functions that increment numbers.
The extension will be built in the local directory.
"""
mod = ext_tools.ext_module('increment_ext')
# Effectively a type declaration for 'a' in the following functions.
a = 1
ext_code = "return_val = PyInt_FromLong(a+1);"
func = ext_tools.ext_function('increment',ext_code,['a'])
mod.add_function(func)
ext_code = "return_val = PyInt_FromLong(a+2);"
func = ext_tools.ext_function('increment_by_2',ext_code,['a'])
mod.add_function(func)
mod.compile()
if __name__ == "__main__":
try:
import increment_ext
except ImportError:
build_increment_ext()
import increment_ext
a = 1
print('a, a+1:', a, increment_ext.increment(a))
print('a, a+2:', a, increment_ext.increment_by_2(a))
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