问题:

我试图使用pip在virtualenv中安装pycurl,但出现此错误

ImportError: pycurl: libcurl link-time ssl backend (openssl) is different from compile-time ssl backend (none/other)

我读了一些文档,其中说: “要解决此问题,您需要告诉setup.py使用了什么SSL后端” (源),尽管由于使用pip安装了pycurl,所以我不确定该怎么做。

使用pip安装pycurl时如何指定SSL后端?

谢谢

I was trying to install pycurl in a virtualenv using pip and I got this errorI read some documentation saying that “To fix this, you need to tell setup.py what SSL backend is used” (source) although I am not sure how to do this since I installed pycurl using pip.How can I specify the SSL backend when installing pycurl with pip?Thanks

问题:

我正在尝试安装lxml以在我的Mac上安装scrapy(v 10.9.4)

╭─[email protected] ~
╰─➤  pip install lxml
Downloading/unpacking lxml
  Downloading lxml-3.4.0.tar.gz (3.5MB): 3.5MB downloaded
  Running setup.py (path:/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/setup.py) egg_info for package lxml
    /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
      warnings.warn(msg)
    Building lxml version 3.4.0.
    Building without Cython.
    Using build configuration of libxslt 1.1.28

    warning: no previously-included files found matching '*.py'
Installing collected packages: lxml
  Running setup.py install for lxml
    /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
      warnings.warn(msg)
    Building lxml version 3.4.0.
    Building without Cython.
    Using build configuration of libxslt 1.1.28
    building 'lxml.etree' extension
    cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/usr/include/libxml2 -I/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/src/lxml/includes -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace
    cc -bundle -undefined dynamic_lookup -arch x86_64 -arch i386 -Wl,-F. build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.9-intel-2.7/lxml/etree.so
    building 'lxml.objectify' extension
    cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/usr/include/libxml2 -I/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/src/lxml/includes -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.objectify.o -w -flat_namespace
    cc -bundle -undefined dynamic_lookup -arch x86_64 -arch i386 -Wl,-F. build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.objectify.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.9-intel-2.7/lxml/objectify.so
    error: could not create '/lib/python2.7/site-packages/lxml': Permission denied
    Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip-_xm20j-record/install-record.txt --single-version-externally-managed --compile:
    /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'

  warnings.warn(msg)

Building lxml version 3.4.0.

Building without Cython.

Using build configuration of libxslt 1.1.28

running install

running build

running build_py

creating build

creating build/lib.macosx-10.9-intel-2.7

creating build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/__init__.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/_elementpath.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/builder.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/cssselect.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/doctestcompare.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/ElementInclude.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/pyclasslookup.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/sax.py -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/usedoctest.py -> build/lib.macosx-10.9-intel-2.7/lxml

creating build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/__init__.py -> build/lib.macosx-10.9-intel-2.7/lxml/includes

creating build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/__init__.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/_diffcommand.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/_html5builder.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/_setmixin.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/builder.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/clean.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/defs.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/diff.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/ElementSoup.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/formfill.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/html5parser.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/soupparser.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

copying src/lxml/html/usedoctest.py -> build/lib.macosx-10.9-intel-2.7/lxml/html

creating build/lib.macosx-10.9-intel-2.7/lxml/isoschematron

copying src/lxml/isoschematron/__init__.py -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron

copying src/lxml/lxml.etree.h -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/lxml.etree_api.h -> build/lib.macosx-10.9-intel-2.7/lxml

copying src/lxml/includes/c14n.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/config.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/dtdvalid.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/etreepublic.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/htmlparser.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/relaxng.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/schematron.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/tree.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/uri.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xinclude.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xmlerror.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xmlparser.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xmlschema.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xpath.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/xslt.pxd -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/etree_defs.h -> build/lib.macosx-10.9-intel-2.7/lxml/includes

copying src/lxml/includes/lxml-version.h -> build/lib.macosx-10.9-intel-2.7/lxml/includes

creating build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources

creating build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/rng

copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/rng

creating build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl

copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl

copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl

creating build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -> build/lib.macosx-10.9-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1

running build_ext

building 'lxml.etree' extension

creating build/temp.macosx-10.9-intel-2.7

creating build/temp.macosx-10.9-intel-2.7/src

creating build/temp.macosx-10.9-intel-2.7/src/lxml

cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/usr/include/libxml2 -I/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/src/lxml/includes -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace

cc -bundle -undefined dynamic_lookup -arch x86_64 -arch i386 -Wl,-F. build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.9-intel-2.7/lxml/etree.so

building 'lxml.objectify' extension

cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/usr/include/libxml2 -I/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/src/lxml/includes -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.objectify.o -w -flat_namespace

cc -bundle -undefined dynamic_lookup -arch x86_64 -arch i386 -Wl,-F. build/temp.macosx-10.9-intel-2.7/src/lxml/lxml.objectify.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.macosx-10.9-intel-2.7/lxml/objectify.so

running install_lib

creating /lib/python2.7/site-packages/lxml

error: could not create '/lib/python2.7/site-packages/lxml': Permission denied

----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip-_xm20j-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /private/var/folders/8l/t7tcq67d34v7qq_4hp3s1dm80000gn/T/pip_build_ishaantaylor/lxml
Storing debug log for failure in /Users/ishaantaylor/Library/Logs/pip.log

如果有人可以帮助我,我会非常感激! 我怀疑这个问题与python的多个版本有关,但我不确定如何检查或修复它。

编辑1:当我尝试sudo pip install lxml :

╭─[email protected] ~
╰─➤  sudo pip install lxml
Traceback (most recent call last):
  File "/bin/pip", line 7, in <module>
    from pip import main
ImportError: No module named pip

编辑2:当我尝试STATIC_DEPS=true sudo pip install lxml

╭─[email protected] ~
╰─➤  STATIC_DEPS=true sudo pip install lxml
Traceback (most recent call last):
  File "/bin/pip", line 7, in <module>
    from pip import main
ImportError: No module named pip

此外,我尝试使用pip安装另一个包,但也无法正常工作..请参阅下文:

╭─[email protected] /lib/python2.7/site-packages
╰─➤  pip install requests
Downloading/unpacking requests
  Downloading requests-2.4.1-py2.py3-none-any.whl (458kB): 458kB downloaded
Installing collected packages: requests
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/commands/install.py", line 283, in run
    requirement_set.install(install_options, global_options, root=options.root_path)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 1435, in install
    requirement.install(install_options, global_options, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 671, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 901, in move_wheel_files
    pycompile=self.pycompile,
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 215, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 205, in clobber
    os.makedirs(destdir)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/lib/python2.7/site-packages/requests'
Storing debug log for failure in /Users/ishaantaylor/Library/Logs/pip.log

编辑4:试图下载virtualenv,人们推荐这个作为sudo的替代品。 结果如下:

╭─[email protected] ~
╰─➤  pip install virtualenv                                                               127 ↵
Downloading/unpacking virtualenv
  Downloading virtualenv-1.11.6-py2.py3-none-any.whl (1.6MB): 1.6MB downloaded
Installing collected packages: virtualenv
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/commands/install.py", line 283, in run
    requirement_set.install(install_options, global_options, root=options.root_path)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 1435, in install
    requirement.install(install_options, global_options, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 671, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 901, in move_wheel_files
    pycompile=self.pycompile,
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 215, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 209, in clobber
    shutil.copy2(srcfile, destfile)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 130, in copy2
    copyfile(src, dst)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 83, in copyfile
    with open(dst, 'wb') as fdst:
IOError: [Errno 13] Permission denied: '/lib/python2.7/site-packages/virtualenv.py'

Storing debug log for failure in /Users/ishaantaylor/Library/Logs/pip.log

编辑5:

╭─[email protected] ~
╰─➤  sudo pip install virtualenv                                                            1 ↵
Password:
Traceback (most recent call last):
  File "/bin/pip", line 7, in <module>
    from pip import main
ImportError: No module named pip
╭─[email protected] ~
╰─➤  pip install virtualenv                                                                 1 ↵
Downloading/unpacking virtualenv
  Downloading virtualenv-1.11.6-py2.py3-none-any.whl (1.6MB): 1.6MB downloaded
Installing collected packages: virtualenv
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/commands/install.py", line 283, in run
    requirement_set.install(install_options, global_options, root=options.root_path)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 1435, in install
    requirement.install(install_options, global_options, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 671, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/req.py", line 901, in move_wheel_files
    pycompile=self.pycompile,
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 215, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/wheel.py", line 209, in clobber
    shutil.copy2(srcfile, destfile)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 130, in copy2
    copyfile(src, dst)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 83, in copyfile
    with open(dst, 'wb') as fdst:
IOError: [Errno 13] Permission denied: '/lib/python2.7/site-packages/virtualenv.py'

Storing debug log for failure in /Users/ishaantaylor/Library/Logs/pip.log

编辑6:响应hd1:

╭─[email protected] ~
╰─➤  curl -kLso /tmp/get-pip.py https://bootstrap.pypa.io/get-pip.py
╭─[email protected] ~
╰─➤  sudo python get-pip.py
python: can't open file 'get-pip.py': [Errno 2] No such file or directory

编辑7:响应hd1:

╭─[email protected] /
╰─➤  curl -kLso /tmp/get-pip.py https://bootstrap.pypa.io/get-pip.py
╭─[email protected] /
╰─➤  cd ~
╭─[email protected] ~
╰─➤  sudo python /tmp/get-pip.py
Requirement already up-to-date: pip in /usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg
Cleaning up...
╭─[email protected] ~
╰─➤  sudo pip install virtualenv
Downloading/unpacking virtualenv
  Downloading virtualenv-1.11.6-py2.py3-none-any.whl (1.6MB): 1.6MB downloaded
Installing collected packages: virtualenv
Successfully installed virtualenv
Cleaning up...
╭─[email protected] ~
╰─➤  mkdir -p ~/.virtualenvs
╭─[email protected] ~
╰─➤  virtualenv ~/.virtualenvs/lxmltest
Traceback (most recent call last):
  File "/bin/virtualenv", line 7, in <module>
    from virtualenv import main
ImportError: No module named virtualenv
╭─[email protected] ~
╰─➤  which virtualenv                                                       1 ↵
/bin/virtualenv
╭─[email protected] ~
╰─➤ echo -e ${PATH//:/\\n}
/usr/local/bin
/usr/bin
/bin
/usr/sbin
/sbin
/opt/X11/bin

This question already has an answer here:Cannot install Lxml on Mac os x 10.9 23 answersdjango installation: cannot use pip to install django on linux(ubuntu) 3 answersI am trying to install lxml to install scrapy on my Mac (v 10.9.4)If somebody could help me I would really appreciate it!I have a suspicion that the issue has to do with multiple versions of python but I’m not sure how to check or fix that.Edit 1: When I try sudo pip install lxml :Edit 2: When I try STATIC_DEPS=true sudo pip install lxmlAlso, I tried installing another package with pip and that didn’t work either.. see below:Edit 4: Tried to download virtualenv, people recommended this as an alternative to sudo.Result is below:Edit 5:Edit 6: In response to hd1:Edit 7: In Response to hd1:

问题:

我目前在Ubuntu 14.04,使用python 2.7和cv2。

当我运行此代码时:

import numpy as np
import cv2

img = cv2.imread('2015-05-27-191152.jpg',0)
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

它返回:

 File "face_detection.py", line 11, in <module>
    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
cv2.error: /home/arthurckl/Desktop/opencv-3.0.0-rc1/modules/imgproc/src/color.cpp:7564: error: (-215) scn == 3 || scn == 4 in function cvtColor

我已经在这里搜索了一个答案,说我可能以错误的方式加载我的照片,因为它应该有3个维度:行,列和深度。

当我打印img.shape时,它只返回两个数字,所以我一定做错了。 但我不知道加载照片的正确方法。

I’m currently in Ubuntu 14.04, using python 2.7 and cv2.When I run this code:it returns:I already searched here and one answer said that I could be loading my photo the wrong way, because it should have 3 dimensions: rows, columns and depth.When I print the img.shape it returns only two numbers, so I must be doing it wrong.But I don’t know the right way to load my photo.

问题:

我正在尝试使用python自动下载历史股票数据。 我尝试打开的URL以CSV文件响应,但我无法使用urllib2打开。 我之前在几个问题中已经尝试更改用户代理,我甚至尝试接受响应cookie,没有运气。 你能帮忙吗?

注意:同样的方法适用于雅虎财经。

码:

import urllib2,cookielib

site= "http://www.nseindia.com/live_market/dynaContent/live_watch/get_quote/getHistoricalData.jsp?symbol=JPASSOCIAT&fromDate=1-JAN-2012&toDate=1-AUG-2012&datePeriod=unselected&hiddDwnld=true"

hdr = {'User-Agent':'Mozilla/5.0'}

req = urllib2.Request(site,headers=hdr)

page = urllib2.urlopen(req)

错误

文件“C:\\ Python27 \\ lib \\ urllib2.py”,第527行,在http_error_default中引发HTTPError(req.get_full_url(),代码,msg,hdrs,fp)urllib2.HTTPError:HTTP错误403:禁止

谢谢你的协助

I am trying to automate download of historic stock data using python.The URL I am trying to open responds with a CSV file, but I am unable to open using urllib2.I have tried changing user agent as specified in few questions earlier, I even tried to accept response cookies, with no luck.Can you please help.Note: The same method works for yahoo Finance.Code:ErrorFile “C:\\Python27\\lib\\urllib2.py”, line 527, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) urllib2.HTTPError: HTTP Error 403: ForbiddenThanks for your assistance

问题:

我想覆盖对类中一个变量的访问,但通常返回所有其他变量。 如何使用__getattribute__完成此操作?

我尝试了以下操作(它也应说明我要执行的操作),但是出现了递归错误:

class D(object):
    def __init__(self):
        self.test=20
        self.test2=21
    def __getattribute__(self,name):
        if name=='test':
            return 0.
        else:
            return self.__dict__[name]

>>> print D().test
0.0
>>> print D().test2
...
RuntimeError: maximum recursion depth exceeded in cmp

I want to override access to one variable in a class, but return all others normally.How do I accomplish this with __getattribute__ ?I tried the following (which should also illustrate what I’m trying to do) but I get a recursion error: