Package (Python PIL/Pillow) installed but I can't import it

问题

I've been using python for simple data processing scripts, but now I want to do some image processing and I encountered a problem. Importing the pillow module doesn't seem to work. I found a simple script here to check what packages are installed and I found it, but importing it doesn't seem to work.

Here's the code I'm trying to run:

import pip
installed_packages = pip.get_installed_distributions()
installed_packages_list = sorted(["%s==%s" % (i.key, i.version)
     for i in installed_packages])
print(installed_packages_list)

import pillow

And here's the result:

runfile('C:/Users/Augustas/.spyder2/temp.py', wdir=r'C:/Users/Augustas/.spyder2')
['-curses==2.2', 'aafigure==0.5', 'alembic==0.7.1', 'apptools==4.2.1', 'argparse==1.2.2', 'astroid==1.3.2', 'astropy==0.4.2', 'atom==0.3.10', 'babel==1.3', 'backports.ssl-match-hostname==3.4.0.2', 'beaker==1.6.4', 'beautifulsoup4==4.3.2', 'beautifulsoup==3.2.1', 'blockcanvas==4.0.3', 'blosc==1.2.4', 'bottleneck==0.8.0', 'cchardet==0.3.5', 'cdecimal==2.3', 'certifi==14.05.14', 'cffi==0.8.6', 'chaco==4.5.0', 'chardet==2.3.0', 'codetools==4.2.0', 'colorama==0.3.2', 'configobj==5.0.6-xy.1', 'configparser==3.3.0r2', 'cov-core==1.15.0', 'coverage==3.7.1', 'cryptography==0.6.1', 'cssselect==0.9.1', 'cvxopt==1.1.7', 'cvxpy==0.2.15', 'cx-freeze==4.3.3', 'cython==0.21.1', 'datrie==0.7', 'decorator==3.4.0', 'dill==0.2.1', 'distlib==0.1.9', 'docutils-aafigure==0.3', 'docutils==0.12', 'ecdsa==0.12.dev1', 'ecos==1.0.5', 'ed25519ll==0.6', 'egenix-mx-base==3.2.8', 'enable==4.4.1', 'enaml==0.9.8', 'enamllexer==0.0.0', 'encore==0.6.0', 'enum34==1.0.4', 'envisage==4.4.0', 'ets==4.4.4', 'etsdevtools==4.0.2', 'etsproxy==0.1.2', 'execnet==1.2.0', 'fabric==1.10.0', 'faulthandler==2.4', 'ffnet==0.7.1', 'fonttools==2.4', 'formlayout==1.0.15', 'funcsigs==0.4', 'futures==2.2.0', 'gdal==1.11.1', 'gevent-websocket==0.9.3', 'gevent==1.0.1', 'graphcanvas==4.0.2', 'greenlet==0.4.5', 'grin==1.2.1-xy1', 'guidata==1.6.1', 'guiqwt==2.3.2', 'h5py==2.3.1', 'html5lib==0.999', 'imageio==0.5.1', 'imread==0.5.1-git.xy.1', 'ipdb==0.8', 'ipdbplugin==1.4.1', 'ipython==2.3.1', 'jaraco.timing==1.1', 'jaraco.util==10.6.2dev', 'jaraco.windows==3.1.2dev', 'jdcal==1.0', 'jinja2==2.7.3', 'keyring==4.0', 'kiwisolver==0.1.3', 'logilab-common==0.63.2', 'lxml==3.4.1', 'mahotas==1.2.3', 'mako==1.0.0', 'markupsafe==0.23', 'matplotlib==1.4.2', 'mayavi==4.3.1', 'mdp==3.3', 'mock==1.0.1', 'modernize==0.4', 'more-itertools==2.3.dev', 'ndg-httpsclient==0.3.3', 'netcdf4==1.1.1', 'netifaces==0.10.4', 'networkx==1.9.1', 'nose-cov==1.6', 'nose-fixes==1.3', 'nose==1.3.4', 'numexpr==2.4', 'numpy==1.8.2', 'objgraph==1.8.1', 'opencv-python==2.4.9', 'openpyxl==2.1.3', 'pandas==0.15.2', 'paramiko==1.15.1', 'pathlib==1.0.1', 'patsy==0.3.0', 'pdfrw==0.1', 'pep8==1.5.7', 'pillow==2.6.1', 'ply==3.4', 'polygon==2.0.5', 'pp==1.6.4', 'psutil==2.1.3', 'py2exe==0.6.9', 'py==1.4.26', 'pyamg==2.1.0', 'pyasn1-modules==0.0.5', 'pyasn1==0.1.8rc2', 'pyaudio==0.2.8', 'pycares==0.6.3', 'pycparser==2.11.dev1', 'pycrypto==2.6.1', 'pycurl==7.19.5', 'pydicom==0.9.9', 'pyemf==2.0.0', 'pyface==4.4.0', 'pyflakes==0.8.1', 'pygments==2.0.1', 'pygraphviz==1.3.dev', 'pyhdf==0.8.3', 'pyhyphen==2.0.5', 'pyicu==1.8-xy.1', 'pylint==1.4.0', 'pymc==2.3.4', 'pyminuit==1.2.1', 'pyodbc==3.0.7', 'pyopengl-accelerate==3.1.0', 'pyopengl==3.1.0', 'pyopenssl==0.14', 'pyparallel==0.2', 'pyparsing==2.0.3', 'pypdf2==1.23', 'pypdf==1.13', 'pyreadline==2.0.6-xy.1', 'pyserial==2.7', 'pytest-bench==0.3.0', 'pytest-cache==1.0', 'pytest-cov==1.8.1', 'pytest-flakes==0.2', 'pytest-pep8==1.0.6', 'pytest-runner==2.1.2', 'pytest-xdist==1.11', 'pytest==2.6.4', 'python-dateutil==2.3', 'pytz==2014.10', 'pyvisa==1.6.1', 'pywavelets==0.2.2', 'pywin32==219', 'pywin==0.3.1', 'pywinauto==0.4.2', 'pyyaml==3.11', 'pyzmq==14.4.1', 'reportlab==3.1.10', 'requests==2.5.0', 'rope==0.10.2', 'rst2pdf==0.93', 'sampy==1.2.1', 'scikit-image==0.10.1', 'scikit-learn==0.15.2', 'scimath==4.1.2', 'scipy==0.14.0', 'scs==1.0.6', 'seaborn==0.5.1', 'sendkeys==0.3', 'simplejson==3.6.5', 'singledispatch==3.4.0.3', 'six==1.8.0', 'smc.freeimage==0.3dev', 'sphinx==1.2.3', 'sphinxcontrib-aafig==1.0', 'sphinxcontrib-napoleon==0.2.8', 'spyder==2.3.2', 'sqlalchemy==0.9.8', 'statsmodels==0.6.1', 'svg2rlg==0.3', 'svglib==0.6.3', 'sympy==0.7.6', 'tables==3.1.1', 'tempita==0.5.2', 'termcolor==1.1.0', 'toolz==0.7.0', 'tornado==4.0.2', 'traits==4.5.0', 'traitsui==4.4.0', 'ttfquery==1.0.5', 'ujson==1.33', 'uncertainties==2.4.6.1', 'unittest2==0.8.0', 'veusz==1.22', 'virtualenv==1.11.6', 'virtualenvwrapper-win==1.1.5', 'vitables==2.1', 'vpython==5.74', 'vtk==5.10.1', 'wheel==0.24.0', 'whoosh==2.5.7', 'wincertstore==0.2', 'winpdb==1.4.8', 'wsaccel==0.6.2', 'wxpython-common==2.8.12.1', 'wxpython==2.8.12.1', 'xhtml2pdf==0.0.7.dev', 'xlrd==0.9.3', 'xlwt==0.7.5']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 601, in runfile
    execfile(filename, namespace)
  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 66, in execfile
    exec(compile(scripttext, filename, 'exec'), glob, loc)
  File "C:/Users/Augustas/.spyder2/temp.py", line 7, in <module>
    import pillow
ImportError: No module named pillow

I'm running this on Windows 8.1 using Spyder and Python 2.7.9

回答1:

You are importing incorrectly. Try using:

import  PIL
from PIL import Image

PIL i.e Python Imaging Library is no longer maintained, Pillow is used instead. To maintain backwards compatibility, PIL module name is used in imports.

回答2:

In fact, Pillow is installed under name "PIL", so:

import PIL as pillow
from PIL import Image
...

Look this:

回答3:

Checkout the doc:

http://pillow.readthedocs.org/handbook/tutorial.html

You must import it like that:

import PIL

来源：https://stackoverflow.com/questions/30547931/package-python-pil-pillow-installed-but-i-cant-import-it