pip安装后的vollib问题

Question

我安装了vollib模块，如下所示：

[root@E7440 boris]# python -m pip install vollib
Collecting vollib
  Using cached vollib-0.1.5.tar.gz
Requirement already satisfied: lets_be_rational in /usr/lib64/python2.7/site-packages (from vollib)
Requirement already satisfied: simplejson in /usr/lib64/python2.7/site-packages (from vollib)
Requirement already satisfied: numpy in /usr/lib64/python2.7/site-packages (from vollib)
Requirement already satisfied: pandas in /usr/lib/python2.7/site-packages/pandas-0.19.0-py2.7-linux-x86_64.egg (from vollib)
Requirement already satisfied: python-dateutil in /usr/lib/python2.7/site-packages (from pandas->vollib)
Requirement already satisfied: pytz>=2011k in /usr/lib/python2.7/site-packages (from pandas->vollib)
Requirement already satisfied: six>=1.5 in /usr/lib/python2.7/site-packages (from python-dateutil->pandas->vollib)
Installing collected packages: vollib
  Running setup.py install for vollib ... done
Successfully installed vollib-0.1.5

虽然安装似乎是成功的，但vollib模块的功能并不像预期的那样：

[root@E7440 boris]# python
Python 2.7.11 (default, Sep 29 2016, 13:33:00) 
[GCC 5.3.1 20160406 (Red Hat 5.3.1-6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import vollib
>>> c = vollib.black_scholes('c',100,90,.5,.01,.2) 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'black_scholes'
>>> dir(vollib)
['__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__']
>>> 

由于某些原因，black_scholes和其他属性(如助手、黑色和black_scholes_merton )丢失或无法访问。

怎么啦？

[root@E7440 boris]# python -m pip check
No broken requirements found.

那里没有问题..。

vollib安装在哪里？

[root@E7440 boris]# python -m pip show vollib
Name: vollib
Version: 0.1.5
Summary: UNKNOWN
Home-page: http://vollib.org
Author: vollib
Author-email: support@quantycarlo.com
License: MIT
Location: /usr/lib/python2.7/site-packages
Requires: lets-be-rational, simplejson, numpy, pandas

检查vollib位置：

[root@E7440 boris]# ll /usr/lib/python2.7/site-packages/vollib* -d
drwxr-xr-x. 7 root root 4096 Nov  5 17:16 /usr/lib/python2.7/site-packages/vollib
drwxr-xr-x. 2 root root 4096 Nov  5 17:16 /usr/lib/python2.7/site-packages/vollib-0.1.5-py2.7.egg-info
[root@E7440 boris]# tree /usr/lib/python2.7/site-packages/vollib
/usr/lib/python2.7/site-packages/vollib
├── black
│   ├── greeks
│   │   ├── analytical.py
│   │   ├── analytical.pyc
│   │   ├── __init__.py
│   │   ├── __init__.pyc
│   │   ├── numerical.py
│   │   └── numerical.pyc
│   ├── implied_volatility.py
│   ├── implied_volatility.pyc
│   ├── __init__.py
│   └── __init__.pyc
├── black_scholes
│   ├── greeks
│   │   ├── analytical.py
│   │   ├── analytical.pyc
│   │   ├── __init__.py
│   │   ├── __init__.pyc
│   │   ├── numerical.py
│   │   └── numerical.pyc
│   ├── implied_volatility.py
│   ├── implied_volatility.pyc
│   ├── __init__.py
│   └── __init__.pyc
├── black_scholes_merton
│   ├── greeks
│   │   ├── analytical.py
│   │   ├── analytical.pyc
│   │   ├── __init__.py
│   │   ├── __init__.pyc
│   │   ├── numerical.py
│   │   └── numerical.pyc
│   ├── implied_volatility.py
│   ├── implied_volatility.pyc
│   ├── __init__.py
│   └── __init__.pyc
├── helper
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── numerical_greeks.py
│   └── numerical_greeks.pyc
├── __init__.py
├── __init__.pyc
└── tests
    ├── __init__.py
    ├── __init__.pyc
    ├── test_black_scholes_greeks.py
    ├── test_black_scholes_greeks.pyc
    ├── test_black_scholes.py
    ├── test_black_scholes.pyc
    ├── test_data.json
    ├── test_utils.py
    └── test_utils.pyc

8 directories, 45 files

模块文件好像是礼物..。

检查所需模块：

[root@E7440 boris]# python -m pip list
DEPRECATION: The default format will switch to columns in the future. You can use --format=legacy (or define a list_format in your pip.conf) to disable this warning.
apicaro (1.0)
arandr (0.1.9)
astroid (1.3.6)
Babel (1.3)
backports.ssl-match-hostname (3.5.0.1)
blivet (1.12.8)
cffi (1.4.2)
chardet (2.2.1)
Cheetah (2.4.4)
coverage (4.0.3)
cryptography (1.2.1)
cssselect (0.9.1)
Cython (0.23.4)
decorator (4.0.10)
dnf-langpacks (0.15.1)
docutils (0.12)
enum (0.4.4)
enum34 (1.0.4)
ethtool (0.11)
frescobaldi (2.19.0)
funcsigs (1.0.2)
gresistor (0.0.1)
gwebsockets (0.4)
humanize (0.5.1)
idna (2.0)
iniparse (0.4)
ipaddress (1.0.7)
IPy (0.81)
iwlib (1.2)
Jinja2 (2.8)
kitchen (1.2.1)
laditools (1.0.1)
langtable (0.0.34)
lets-be-rational (1.0.9)
logilab-common (0.63.2)
lxml (3.4.4)
MarkupSafe (0.23)
matplotlib (1.4.3)
meld (3.14.0)
mercurial (3.5.2)
mibian (0.1.3)
mock (2.0.0)
mutagen (1.29)
myhdl (0.8.1)
ndg-httpsclient (0.4.0)
nose (1.3.7)
ntplib (0.3.3)
numpy (1.9.2)
pandas (0.19.0)
pbr (1.10.0)
pdfshuffler (0.6.0)
pexpect (4.0.1)
Phatch (0.2.7)
Pillow (3.0.0)
pip (9.0.0)
ply (3.6)
progress (1.2)
protobuf (2.6.1)
ptyprocess (0.5.1)
pwquality (1.3.0)
pyalsa (1.0.29)
pyasn1 (0.1.8)
pyasn1-modules (0.0.6)
pycparser (2.14)
pycurl (7.19.5.1)
pyflakes (1.0.0)
PyGithub (1.25.2)
Pygments (2.1.3)
pygobject (3.18.2)
pygpgme (0.3)
pyinotify (0.9.6)
pykickstart (2.13)
pyliblo (0.9.1)
pyliblzma (0.5.3)
pylint (1.4.3)
PyOpenGL (3.1.0)
PyOpenGL-accelerate (3.1.0)
pyOpenSSL (0.15.1)
pyparsing (2.1.5)
pyparted (3.10.7)
pyPdf (1.13)
pypoppler (0.12.2)
pyserial (3.1.1)
PySocks (1.5.6)
python-augeas (0.5.0)
python-dateutil (2.4.2)
python-dmidecode (3.12.2)
python-ldap (2.4.17)
python-ly (0.9.4)
python-meh (0.43)
python-nss (0.16.0)
python-poppler-qt4 (0.18.1)
python-systemd (231)
pytz (2015.4)
pyudev (0.21.0)
pyusb (1.0.0)
pyxattr (0.5.3)
PyXB (1.2.4)
pyxdg (0.25)
PyYAML (3.11)
reportlab (3.3.0)
requests (2.10.0)
rope (0.10.2)
rpm-python (4.13.0rc1)
scdate (1.10.9)
scipy (0.14.1)
setuptools (18.0.1)
simplejson (3.5.3)
six (1.9.0)
slip (0.6.4)
slip.dbus (0.6.4)
Sphinx (1.2.3)
spyder (2.3.8)
SSSDConfig (1.14.1)
tepache (1.2)
uniconvertor (2.0)
Unidecode (0.4.16)
urlgrabber (3.10.1)
urllib3 (1.15.1)
vollib (0.1.5)
wxPython (3.0.2.0)
wxPython-common (3.0.2.0)
yum-langpacks (0.4.5)
yum-metadata-parser (1.1.4)

所有的东西都在那里，vollib (0.1.5)，lets rational (1.0.9)，simplejson (3.5.3)，numpy (1.9.2)和熊猫(0.19.0)都在列表中.

我不明白vollib有什么问题。有人能帮我安装这个包吗？

Answer 1

首先，black_scholes不包括在 package中，所以您不能只使用import vollib。第二，black_scholes是一个不可调用的模块。正确的用法：

import vollib.black_scholes
c = vollib.black_scholes.black_scholes('c',100,90,.5,.01,.2)