Fix build error

bip32/__init__.py

@@ -1,12 +1,12 @@
-from .bip32 import BIP32, PrivateDerivationError, InvalidInputError
-from .utils import BIP32DerivationError, HARDENED_INDEX
-
-__version__ = "3.4"
+from .__version__ import __version__
+from .bip32 import BIP32, InvalidInputError, PrivateDerivationError
+from .utils import HARDENED_INDEX, BIP32DerivationError
 
 __all__ = [
     "BIP32",
     "BIP32DerivationError",
     "PrivateDerivationError",
     "InvalidInputError",
     "HARDENED_INDEX",
+    "__version__",
 ]

bip32/__version__.py

@@ -0,0 +1 @@
+__version__ = "3.4"

requirements.txt

@@ -1,2 +1,2 @@
-coincurve>=15.0,<19
+coincurve>=15.0,<21
 base58~=2.0

setup.py

@@ -1,23 +1,27 @@
-from setuptools import setup
-import bip32
 import io
 
+from setuptools import setup
 
 with io.open("README.md", encoding="utf-8") as f:
     long_description = f.read()
 
 with io.open("requirements.txt", encoding="utf-8") as f:
-    requirements = [r for r in f.read().split('\n') if len(r)]
+    requirements = [r for r in f.read().split("\n") if len(r)]
+
+with io.open("bip32/__version__.py", encoding="utf-8") as f:
+    exec(f.read())
 
-setup(name="bip32",
-      version=bip32.__version__,
-      description="Minimalistic implementation of the BIP32 key derivation scheme",
-      long_description=long_description,
-      long_description_content_type="text/markdown",
-      url="http://github.com/darosior/python-bip32",
-      author="Antoine Poinsot",
-      author_email="darosior@protonmail.com",
-      license="MIT",
-      packages=["bip32"],
-      keywords=["bitcoin", "bip32", "hdwallet"],
-      install_requires=requirements)
+setup(
+    name="bip32",
+    version=__version__,
+    description="Minimalistic implementation of the BIP32 key derivation scheme",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    url="http://github.com/darosior/python-bip32",
+    author="Antoine Poinsot",
+    author_email="darosior@protonmail.com",
+    license="MIT",
+    packages=["bip32"],
+    keywords=["bitcoin", "bip32", "hdwallet"],
+    install_requires=requirements,
+)