モジュールはインストールされますが、インポートできません。

Question

私はPythonを初めて使いました。インストールしたモジュールに依存するMacでPython2スクリプトを実行しようとしていますが、スクリプトに従っては見つかりません。なぜ次のことが失敗するのですか？

Home:Dev m$ python -V 
Python 2.7.10 
Home:Dev m$ sudo pip install coincurve==5.2.0 pysha3 
Password: 
The directory '/Users/m/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag. 
The directory '/Users/m/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag. 
Collecting coincurve==5.2.0 
    Downloading coincurve-5.2.0-cp27-cp27m-macosx_10_6_intel.whl (157kB) 
    100% |████████████████████████████████| 163kB 1.3MB/s 
Collecting pysha3 
    Downloading pysha3-1.0.2.tar.gz (829kB) 
    100% |████████████████████████████████| 829kB 692kB/s 
Requirement already satisfied: cffi>=1.3.0 in /usr/local/lib/python2.7/site-packages (from coincurve==5.2.0) 
Requirement already satisfied: asn1crypto in /usr/local/lib/python2.7/site-packages (from coincurve==5.2.0) 
Requirement already satisfied: pycparser in /usr/local/lib/python2.7/site-packages (from cffi>=1.3.0->coincurve==5.2.0) 
Installing collected packages: coincurve, pysha3 
    Running setup.py install for pysha3 ... done 
Successfully installed coincurve-5.2.0 pysha3-1.0.2 
Home:Dev m$ pip show coincurve 
Name: coincurve 
Version: 5.2.0 
Summary: Cross-platform Python CFFI bindings for libsecp256k1 
Home-page: https://github.com/ofek/coincurve 
Author: Ofek Lev 
Author-email: ofekmeister@gmail.com 
License: MIT/Apache-2.0 
Location: /usr/local/lib/python2.7/site-packages 
Requires: cffi, asn1crypto 
Home:Dev m$ python 
Python 2.7.10 (default, Jul 15 2017, 17:16:57) 
[GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.31)] on darwin 
Type "help", "copyright", "credits" or "license" for more information. 
>>> import coincurve 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
ImportError: No module named coincurve 
>>> 

Answer 1

問題は、あなたがのpython 2.7シェルでは、実際にはないことです。いくつかのLinuxディストリビューションでは、シェルに入るためにはPythonのバージョンを指定する必要があります。上記のコマンドは、自動的にのpython 3.xのシェルを開きますので

python 

：

python2 

の代わりに：だから、次のコマンドを実行します。