fix windows error

@@ -7,11 +7,13 @@ from distutils.core import setup
 from distutils.extension import Extension
 from Cython.Build import cythonize
 from Cython.Distutils import build_ext
+import platform
 
 
 if sys.version_info[0] < 3:
     raise Exception("This program requires at least python3.6")
 
+is_windows = platform.system() == 'Windows'
 
 parser = argparse.ArgumentParser(description='compile the .py to .so(Linux/Mac) or .pdy(Win)')
 parser.add_argument('-i', '--input', help='the directory(file) path of your project', required=True)
@@ -20,6 +22,18 @@ parser.add_argument('-e', '--exclude', help='exclude file. eg: ignore/ignore.py,
 args = parser.parse_args()
 
 
+def get_export_symbols_fixed(self, ext):
+    names = ext.name.split('.')
+    if names[-1] != "__init__":
+        initfunc_name = "PyInit_" + names[-1]
+    else:
+        # take name of the package if it is an __init__-file
+        initfunc_name = "PyInit_" + names[-2]
+    if initfunc_name not in ext.export_symbols:
+        ext.export_symbols.append(initfunc_name)
+    return ext.export_symbols
+
+
 def get_exclude_paths(input_path):
     exclude_paths = []
     if args.exclude is not None and os.path.isdir(input_path):
@@ -140,6 +154,10 @@ def main():
     print('---------- compile start ----------')
     success = False
     try:
+        if is_windows:
+            # replace wrong version with the fixed:
+            build_ext.get_export_symbols = get_export_symbols_fixed
+
         compiler_directives = {"language_level": '3'}
         ext_modules = cythonize(module_list=extensions,
                                 compiler_directives=compiler_directives)