python中的_fastmath错误:HAVE_DECL_MPZ_POWM_SEC

我在Red Hat 6.4上运行python 2.6

我使用paramiko sftp在一台机器上运行了一个脚本.当我把它转移到另一台机器时,我得到了一个例外:( SFTP file has no attribute __exit__沿着这些方向的东西).

我决定用pip升级paramiko(认为它会解决问题).现在我在运行python脚本时得到这个:

  ...
  File "/usr/lib/python2.6/site-packages/paramiko/__init__.py", line 64, in 
    from transport import SecurityOptions, Transport
  File "/usr/lib/python2.6/site-packages/paramiko/transport.py", line 33, in 
    from paramiko import util
  File "/usr/lib/python2.6/site-packages/paramiko/util.py", line 33, in 
    from paramiko.common import *
  File "/usr/lib/python2.6/site-packages/paramiko/common.py", line 98, in 
    from Crypto import Random
  File "/usr/lib64/python2.6/site-packages/Crypto/Random/__init__.py", line 29, in 
    from Crypto.Random import _UserFriendlyRNG
  File "/usr/lib64/python2.6/site-packages/Crypto/Random/_UserFriendlyRNG.py", line 38, in 
    from Crypto.Random.Fortuna import FortunaAccumulator
  File "/usr/lib64/python2.6/site-packages/Crypto/Random/Fortuna/FortunaAccumulator.py", line 39, in 
    import FortunaGenerator
  File "/usr/lib64/python2.6/site-packages/Crypto/Random/Fortuna/FortunaGenerator.py", line 34, in 
    from Crypto.Util.number import ceil_shift, exact_log2, exact_div
  File "/usr/lib64/python2.6/site-packages/Crypto/Util/number.py", line 56, in 
    if _fastmath is not None and not _fastmath.HAVE_DECL_MPZ_POWM_SEC:
AttributeError: 'module' object has no attribute 'HAVE_DECL_MPZ_POWM_SEC'

所以帮忙!!