在Mac osx 10.9.4上使用pip install twisted in virtualenv时,我得到了这个结果：

命令“python setup.py egg_info”失败,错误代码1在/ private / var / folders / 9r / 3b500gbs3093ms87mqqbckr80000gn / T / pip-build-doynftp7 / twisted /

我不知道该如何解决.我使用了easy_install,但是我遇到了SSL验证问题.有人有类似的问题吗？其余的错误消息如下.

Collecting twisted

Using cached Twisted-16.6.0.tar.bz2

Complete output from command python setup.py egg_info:

Download error on https://pypi.python.org/simple/incremental/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) -- Some packages may not be found!

Couldn't find index page for 'incremental' (maybe misspelled?)

Download error on https://pypi.python.org/simple/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) -- Some packages may not be found!

No local packages or working download links found for incremental>=16.10.1

Traceback (most recent call last):

File "", line 1, in

File "/private/var/folders/9r/3b500gbs3093ms87mqqbckr80000gn/T/pip-build-lqvxc68n/twisted/setup.py", line 21, in

setuptools.setup(**_setup["getSetupArgs"]())

File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/distutils/core.py", line 108, in setup

_setup_distribution = dist = klass(attrs)

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/setuptools/dist.py", line 317, in __init__

self.fetch_build_eggs(attrs['setup_requires'])

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/setuptools/dist.py", line 372, in fetch_build_eggs

replace_conflicting=True,

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/pkg_resources/__init__.py", line 851, in resolve

dist = best[req.key] = env.best_match(req, ws, installer)

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1123, in best_match

return self.obtain(req, installer)

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1135, in obtain

return installer(requirement)

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/setuptools/dist.py", line 440, in fetch_build_egg

return cmd.easy_install(req)

File "/Users/Complex-Cauchy/1/lib/python3.6/site-packages/setuptools/command/easy_install.py", line 668, in easy_install

raise DistutilsError(msg)

distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('incremental>=16.10.1')

----------------------------------------

命令“python setup.py egg_info”失败,错误代码1在/ private / var / folders / 9r / 3b500gbs3093ms87mqqbckr80000gn / T / pip-build-lqvxc68n / twisted /

运行openssl s_client -showcerts -connect pypi.python.org:443

?返回以下内容：

CONNECTED(00000003)

depth=1 /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 Extended Validation Server CA

verify error:num=20:unable to get local issuer certificate

verify return:0

---

Certificate chain

0 s:/businessCategory=Private Organization/1.3.6.1.4.1.311.60.2.1.3=US/1.3.6.1.4.1.311.60.2.1.2=Delaware/serialNumber=3359300/street=16 Allen Rd/postalCode=03894-4801/C=US/ST=NH/L=Wolfeboro/O=Python Software Foundation/CN=www.python.org

i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 Extended Validation Server CA

-----BEGIN CERTIFICATE-----

MIIIWjCCB0KgAwIBAgIQCXCW7BLw16II/CMOsOFe/jANBgkqhkiG9w0BAQsFADB1

..

-----END CERTIFICATE-----

1 s:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 Extended Validation Server CA

i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert High Assurance EV Root CA

-----BEGIN CERTIFICATE-----

MIIEtjCCA56gAwIBAgIQDHmpRLCMEZUgkmFf4msdgzANBgkqhkiG9w0BAQsFADBs

....

-----END CERTIFICATE-----

Server certificate

subject=/businessCategory=Private Organization/1.3.6.1.4.1.311.60.2.1.3=US/1.3.6.1.4.1.311.60.2.1.2=Delaware/serialNumber=3359300/street=16 Allen Rd/postalCode=03894-4801/C=US/ST=NH/L=Wolfeboro/O=Python Software Foundation/CN=www.python.org

issuer=/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 Extended Validation Server CA

---

No client certificate CA names sent

---

SSL handshake has read 3524 bytes and written 456 bytes

---

New, TLSv1/SSLv3, Cipher is AES128-SHA

Server public key is 2048 bit

Secure Renegotiation IS supported

Compression: NONE

Expansion: NONE

SSL-Session:

Protocol : TLSv1

Cipher : AES128-SHA

Session-ID: BC7695FF86D2B82B20468A13E3F3E13AE23776B500E64665305EEBAF49BB54D1

Session-ID-ctx:

Master-Key:8D25B34237A3C74E90317D87BA74A2AAF0E8C424FB2ADE3D72E5F234D5E043C4527641290B928B3A22 1BE7D44116CFB1

Key-Arg : None

Start Time: 1487035770

Timeout : 300 (sec)

Verify return code: 0 (ok)