def get_pybind11_flags(build_ext, includes, abi_compile_flags):
pybind11_dir = os.environ.get('PYBIND11_HOME')
if pybind11_dir:
pybind11_dir += '/include'
else:
try:
import pybind11
pybind11_dir = [pybind11.get_include()]
except Exception:
last_err = 'Unable found PYBIND11_HOME,please pip3 install pybind11 or set PYBIND11_HOME'
raise DistutilsPlatformError(last_err)
last_err = None
cpp_flags = ['-I' + i for i in includes] + abi_compile_flags
try:
lib_file = test_compile(build_ext,
'example',
extra_preargs=cpp_flags,
include_dirs=pybind11_dir,
code=textwrap.dedent('''\
#include <pybind11/pybind11.h>
namespace py = pybind11;
int add(int i, int j) {
return i + j;
}
PYBIND11_MODULE(example, m) {
m.doc() = "pybind11 example plugin"; // optional module docstring
m.def("add", &add, "A function which adds two numbers",
py::arg("i"), py::arg("j"));
}
'''))
lib_dir = os.path.dirname(lib_file)
if lib_dir not in sys.path:
sys.path.append(lib_dir)
import example
example.add(1, 2)
sys.path.pop()
return pybind11_dir
except (CompileError, LinkError):
last_err = 'Unable to determine -I include flags to use with pybind11 (see error above).'
except Exception:
last_err = 'Unable to determine -I include flags to use with pybind11. ' \
'Last error:\n\n%s' % traceback.format_exc()
raise DistutilsPlatformError(last_err)
def test(self):
sys.path.append(".")
import example
self.output.info("Add %s" % example.add(2, 3))
assert example.add(2, 40) == 42
def test_addition():
"""Test addition."""
assert example.add(2, 2) == 4
import example # First create some objects using the pointer library. print "Testing the pointer library" a = example.new_intp() b = example.new_intp() c = example.new_intp() example.intp_assign(a, 37) example.intp_assign(b, 42) print " a =", a print " b =", b print " c =", c # Call the add() function with some pointers example.add(a, b, c) # Now get the result r = example.intp_value(c) print " 37 + 42 =", r # Clean up the pointers example.delete_intp(a) example.delete_intp(b) example.delete_intp(c) # Now try the typemap library # This should be much easier. Now how it is no longer # necessary to manufacture pointers. print "Trying the typemap library"
def test_cpp_module():
import example
assert example.add(1, 2) == 3
assert example.add(8, 2) == 10
#导入模块和命名 import example as e; import imp; import sys; #调用模块中的函数名 print(e.add(5,5)); #输出路径 print(dir(e)); #重新加载路径 imp.reload(e); #获取系统的路径 print(sys.path); #打印出当前模块中的所有模块函数 print(dir())
import example
# 首先，使用指针库创建一些对象
print("Testing the pointer library")
a = example.new_intp()
b = example.new_intp()
c = example.new_intp()
example.intp_assign(a, 37)
example.intp_assign(b, 42)
print(" a =", a)
print(" b =", b)
print(" c =", c)
# 在指针对象上调用add函数
example.add(a, b, c)
# 得到结果
r = example.intp_value(c)
print(" 37 + 42 =", r)
# 清除指针
example.delete_intp(a)
example.delete_intp(b)
example.delete_intp(c)
# 现在尝试一下类型映射库(typemaps)
# 这样的方式会简单许多，因为不再需要操纵指针。
print("Trying the typemap library")
r = example.sub(37, 42)
print(" 37 - 42 =", r)
def test(self):
sys.path.append("./bin")
import example
print("Add %s" % example.add(2, 3))
assert example.add(2, 40) == 42
def test_freestanding_add():
assert add(5, 6) == 11
import example
sum = example.add(4, 5.5)
print('Direct import sum is : %d', sum)
from example import add
sum = add(4, 5.5)
print('From example import sum is : %d', sum)
import math
print("The value of pi is", math.pi)
# import module by renaming it
import math as m
print("The value of pi is", m.pi)
# import only pi from math module
from math import pi
print("The value of pi is", pi)
# Output: 3.141592653589793
print(math.pi)
# Output: -1.0
print(math.cos(math.pi))
# Output: 22026.465794806718
print(math.exp(10))
# Output: 3.0
print(math.log10(1000))
# file: runme.py
import example
a = 37
b = 42
# Now call our C function with a bunch of callbacks
print("Trying some C callback functions")
print(" a =", a)
print(" b =", b)
print(" ADD(a,b) =", example.do_op(a, b, example.ADD))
print(" SUB(a,b) =", example.do_op(a, b, example.SUB))
print(" MUL(a,b) =", example.do_op(a, b, example.MUL))
print("Here is what the C callback function objects look like in Python")
print(" ADD =", example.ADD)
print(" SUB =", example.SUB)
print(" MUL =", example.MUL)
print("Call the functions directly...")
print(" add(a,b) =", example.add(a, b))
print(" sub(a,b) =", example.sub(a, b))
import example print example.add(i=3)
def test_add_2_and_2(self):
self.assertEqual(
4,
example.add(2, 2)
)
def test_add_2_and_minus_2(self):
self.assertEqual(
0,
example.add(2, -2)
)
import os
import sys
sys.path.append(os.getenv('EXAMPLE_MODULE_PATH'))
import example
v = example.add()
assert v == 3
print(v)
v = example.add(1, 2)
assert v == 3
print(v)
v = example.add(i=2, j=3)
assert v == 5
print(v)
import example print(example.add(2, 3))
import example
print example.add(1, 2)
p = example.Pet('Molly')
print p
print p.getName()
p.setName('Charly')
print p.getName()
from example import add
assert add(1, 2) == 3
assert add(1, 3.0) == 4
assert add("a", "b") == "Bad inputs"
else:
return n * factorial(n - 1)
print(factorial(4))
#anonymous/lambda fnx
double = lambda x: x * 2
print(double(5))
my_list = [1, 5, 4, 6, 8, 11, 3, 12]
new_list = list(filter(lambda x: (x % 2 == 0), my_list))
print(new_list)
#module
mod = example.add(4, 5.5)
print(mod)
print(dir(example))
print(dir())
def outer():
first_num = 1
def inner():
first_num = 0
second_num = 1
print('inner - second_num is: ', second_num)
inner()
print('outer - first_num is: ', first_num)
def test_add_100_and_1(self):
self.assertEqual(
101,
example.add(100, 1)
)
# Python模块
# 在一个 example.py 里面写下如下代码：
def add(a, b):
"""这个程序增加了两个
然后返回结果"""
result = a + b
return result
# 在main.py 里面导入这个模块
import example
print(example.add(4, 2))
import sys sys.path.insert(1, './lib') import example print(example.add(1, 2)) print(example.add(1.1, 2.2))
import example
print(example.add(4, 5.5))
with open("text.txt", 'w', encoding = 'utf-8') as f:
f.write("my first file\n")
f.write("This file \n\n")
f.write("contains three lines\n")
import example from example import add as a from example import sub as b print(example.add(4, 5)) print(example.sub(4, 5)) print(example.mul(4, 5)) print(a(5, 4)) print(b(5, 4))
import example result1 = example.add(1, 3) #测试 typemaps 中的INPUT, OUTPUT result2 = example.sub(3, 2) print(result1) print(result2)
def subsetsums(slices, pizza_types, pizza_slices):
for target in range(slices, 0, -1):
res = add(pizza_slices, pizza_types, target)
if res:
return len(res), res
return 0, []
import example hello = example.add(5, 6) print hello
def test_add():
assert example.add(1, 1) == 2
assert not example.add(0, 1) == 2
#!/usr/bin/env python3
"""Minimal example of a C++ to Python Binding using pybind11
Original code available at https://pybind11.readthedocs.io/en/latest/basics.html#compiling-the-test-cases
"""
import example
a, b = 1, 2
print(a, "+", b, "=", example.add(i=a, j=b))
# >>>help(example)
print("THE answer is", example.the_answer)
# file: runme.py
import example
a = 37
b = 42
# Now call our C function with a bunch of callbacks
print("Trying some C callback functions")
print(" a = %s" % a)
print(" b = %s" % b)
print(" ADD(a,b) = %s" % example.do_op(a, b, example.ADD))
print(" SUB(a,b) = %s" % example.do_op(a, b, example.SUB))
print(" MUL(a,b) = %s" % example.do_op(a, b, example.MUL))
print("Here is what the C callback function objects look like in Python")
print(" ADD = %s" % example.ADD)
print(" SUB = %s" % example.SUB)
print(" MUL = %s" % example.MUL)
print("Call the functions directly...")
print(" add(a,b) = %s" % example.add(a, b))
print(" sub(a,b) = %s" % example.sub(a, b))
import example # Test print example.add(1, 2) # Test with arguments print example.add(i=1, j=2) # Test literal print example.add2(1, 2) # will print doc info # help(example) # Test literal print example.add() print example.the_answer print example.what
import example
a = 1
b = 2
print("Add: {} + {} = {}".format(a, b, example.add(a, b)))
#!/usr/bin/env python import example example.add(2,3)
def test_add(self):
self.assertEquals(4, example.add(2, 2))
self.assertEquals(4, example.add(2, 2))
import example
result = example.add(1, 2)
print(f'Result: {result}')
# file: runme.py import example a = 37 b = 42 # Now call our C function with a bunch of callbacks print "Trying some C callback functions" print " a =", a print " b =", b print " ADD(a,b) =", example.do_op(a,b,example.ADD) print " SUB(a,b) =", example.do_op(a,b,example.SUB) print " MUL(a,b) =", example.do_op(a,b,example.MUL) print "Here is what the C callback function objects look like in Python" print " ADD =", example.ADD print " SUB =", example.SUB print " MUL =", example.MUL print "Call the functions directly..." print " add(a,b) =", example.add(a,b) print " sub(a,b) =", example.sub(a,b)
def test_add():
assert add(5, 4) == 9
assert add(1, 1) == 2
def test_1_add():
"""Test 1."""
assert example.add(3, 4) == 7
import example from math import * import sys result = example.add(4, 5) print(result) print(pi) print(e) print(sys.path)
import example print(example.add(1, 2))
def test_add_12_and_24(self):
self.assertEqual(
36,
example.add(12, 24)
)
