错误命令'gcc'失败，退出状态为1

Question

I installed Scrapy on windows 7 64bit. When I enter scrapy startproject tutorial in CMD, I get an error:

ImportError: No module named `cryptography.hazmat.bindings.openssl.binding`

To solve this, I want to install pycrypto. When I run pip install pycrypto , the next error was: _Unable to find vcvarsall.bat _ , because I have installed Visual Studio 2010, to solve this, I installed mingw32 and set environment variable and disabled my antivirus and removed -mno-cygwin from cygwinccompiler.py :

if self.gcc_version < '4' or is_cygwingcc():
    no_cygwin = ''
else:
    no_cygwin = ' -mno-cygwin'

Became:

if self.gcc_version < '4' or is_cygwingcc():
    no_cygwin = ''
else:
    no_cygwin = ''

And now I get the error:

error command 'gcc' failed with exit status 1

(Installed python 2.7 64)

Please guide me.

Answer 1

The easy thing is just to install the binary builds from http://www.voidspace.org.uk/python/modules.shtml#pycrypto

Then you can attempt building the PyCrypto C extensions again at leisure:

• Visual Studio ships with a CMD shortcut that vcvarsall.bat . Use that shortcut to start cmd.exe and run pip install from there.
• (alternatively) Install cygwin instead of mingw to avoid having to change PyCrypto's build scripts
• Pycrypto have dependencies on either GMP or MPIR for bignums. Cygwin ships precompiled binaries of those. I'm sure there are Mingw based projects that have GMP precompiled as well.
• You'd need to either get prebuild binaries and headers for Pycrypto's dependencies or build them manually yourself