Pip在Python 3.5与2.7（RHEL）上的安装速度明显较慢

Question

我目前正在运行Red Hat 7.3并从SCL（www.softwarecollections.org/en/scls/rhscl/rh-python35/）安装了Python 3.5。当我尝试点击安装C密集包（如numpy和pandas）时，Python 3.5上的安装过程比我尝试在本机Python 2.7安装中安装相同包的时间要长得多（每个包6分钟，而大约10秒） 。

我有一些自动化进程正在频繁地构建和重建虚拟环境，所以这对整体性能产生了巨大的影响。有谁知道为什么这些安装在Python 3.5中花费更长的时间？任何帮助将不胜感激。

下面是两个版本的'pip install numpy -v'的片段。即跳出我的明显的一点就是海合会建筑，发生在2.7 3.5而不是，但我不知道为什么...

机Python 2.7：

Looking up "https://pypi.python.org/packages/dd/b5/47bd2174dbb14e5fa2dd6ad28fd1d54d38e84d29c1b131a00354ddb0cae0/numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl" in the cache 
    Current age based on date: 5291 
    Freshness lifetime from max-age: 31557600 
    The response is "fresh", returning cached response 
    31557600 > 5291 
    Using cached numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl 
    Downloading from URL https://pypi.python.org/packages/dd/b5/47bd2174dbb14e5fa2dd6ad28fd1d54d38e84d29c1b131a00354ddb0cae0/numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl#md5=a0b187652045bfb4c014f24c921c644b (from https://pypi.python.org/simple/numpy/) 
Installing collected packages: numpy 

Successfully installed numpy-1.13.0 
Cleaning up... 

SCL的Python 3.5：

... 
    LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_not_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:675:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar1_not_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:703:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_not_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_less_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:675:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar1_less_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:703:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_less_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_less_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:675:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar1_less_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:703:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_less_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_greater_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:675:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar1_greater_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:703:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_greater_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_greater_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:675:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar1_greater_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:703:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_scalar2_greater_equal_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:727:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 64) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_sqrt_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:753:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:759:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_absolute_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:804:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:810:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_negative_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:804:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:810:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 16) { 
      ^
    In file included from numpy/core/src/umath/loops.c.src:39:0: 
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_maximum_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:836:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     if (i + 3 * stride <= n) { 
          ^
    In file included from numpy/core/src/umath/loops.c.src:39:0: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:844:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 32) { 
      ^
    In file included from numpy/core/src/umath/loops.c.src:39:0: 
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_minimum_DOUBLE’: 
    numpy/core/src/umath/simd.inc.src:836:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     if (i + 3 * stride <= n) { 
          ^
    In file included from numpy/core/src/umath/loops.c.src:39:0: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:844:9: note: in expansion of macro ‘LOOP_BLOCKED’ 
      LOOP_BLOCKED(@type@, 32) { 
      ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_logical_or_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:910:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 16) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_reduce_logical_or_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:942:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(npy_bool, 32) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_binary_logical_and_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:910:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 16) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_reduce_logical_and_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:942:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(npy_bool, 32) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_absolute_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:984:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 16) { 
     ^
    numpy/core/src/umath/simd.inc.src: In function ‘sse2_logical_not_BOOL’: 
    numpy/core/src/umath/simd.inc.src:107:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for(; i < npy_blocked_end(peel, sizeof(type), vsize, n);\ 
       ^
    numpy/core/src/umath/simd.inc.src:984:5: note: in expansion of macro ‘LOOP_BLOCKED’ 
     LOOP_BLOCKED(@type@, 16) { 
     ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_FLOAT’: 
    numpy/core/src/umath/loops.c.src:1635:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i++) { 
         ^
    numpy/core/src/umath/loops.c.src:1658:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:1676:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i++) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_DOUBLE’: 
    numpy/core/src/umath/loops.c.src:1635:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i++) { 
         ^
    numpy/core/src/umath/loops.c.src:1658:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:1676:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i++) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_LONGDOUBLE’: 
    numpy/core/src/umath/loops.c.src:1635:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i++) { 
         ^
    numpy/core/src/umath/loops.c.src:1658:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:1676:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i++) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_HALF’: 
    numpy/core/src/umath/loops.c.src:1635:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i++) { 
         ^
    numpy/core/src/umath/loops.c.src:1658:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:1676:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i++) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_CFLOAT’: 
    numpy/core/src/umath/loops.c.src:2410:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i += 2) { 
         ^
    numpy/core/src/umath/loops.c.src:2434:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:2452:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i+=2) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_CDOUBLE’: 
    numpy/core/src/umath/loops.c.src:2410:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i += 2) { 
         ^
    numpy/core/src/umath/loops.c.src:2434:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:2452:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i+=2) { 
        ^
    numpy/core/src/umath/loops.c.src: In function ‘pairwise_sum_CLONGDOUBLE’: 
    numpy/core/src/umath/loops.c.src:2410:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 0; i < n; i += 2) { 
         ^
    numpy/core/src/umath/loops.c.src:2434:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (i = 8; i < n - (n % 8); i += 8) { 
         ^
    numpy/core/src/umath/loops.c.src:2452:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
      for (; i < n; i+=2) { 
        ^
    gcc: numpy/core/src/umath/umathmodule.c 
    gcc: numpy/core/src/umath/reduction.c 
    gcc: numpy/core/src/private/mem_overlap.c 
    numpy/core/src/private/mem_overlap.c: In function ‘diophantine_dfs’: 
    numpy/core/src/private/mem_overlap.c:420:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
        for (j = 0; j < n; ++j) { 
           ^
    numpy/core/src/private/mem_overlap.c: In function ‘strides_to_terms’: 
    numpy/core/src/private/mem_overlap.c:715:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for (i = 0; i < PyArray_NDIM(arr); ++i) { 
        ^
    numpy/core/src/private/mem_overlap.c: In function ‘solve_may_share_memory’: 
    numpy/core/src/private/mem_overlap.c:801:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     if (rhs != (npy_uintp)rhs) { 
       ^
    numpy/core/src/private/mem_overlap.c: In function ‘solve_may_have_internal_overlap’: 
    numpy/core/src/private/mem_overlap.c:890:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for (j = 0; j < nterms; ++j) { 
        ^
    numpy/core/src/private/mem_overlap.c:908:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] 
     for (j = 0; j < nterms; ++j) { 
        ^
    gcc: numpy/core/src/umath/ufunc_type_resolution.c 
    gcc: numpy/core/src/umath/ufunc_object.c 
    numpy/core/src/umath/ufunc_object.c: In function ‘PyUFunc_GenericReduction’: 
    numpy/core/src/umath/ufunc_object.c:3897:15: warning: unused variable ‘out_obj’ [-Wunused-variable] 
     PyObject *out_obj = NULL; 
       ^
    gcc: numpy/core/src/private/ufunc_override.c 
    gcc -pthread -shared -L/opt/rh/rh-python35/root/usr/lib64-Wl,-z,relro build/temp.linux-x86_64-3.5/numpy/core/src/umath/umathmodule.o build/temp.linux-x86_64-3.5/numpy/core/src/umath/reduction.o build/temp.linux-x86_64-3.5/build/src.linux-x86_64-3.5/numpy/core/src/umath/loops.o build/temp.linux-x86_64-3.5/numpy/core/src/umath/ufunc_object.o build/temp.linux-x86_64-3.5/build/src.linux-x86_64-3.5/numpy/core/src/umath/scalarmath.o build/temp.linux-x86_64-3.5/numpy/core/src/umath/ufunc_type_resolution.o build/temp.linux-x86_64-3.5/numpy/core/src/umath/override.o build/temp.linux-x86_64-3.5/numpy/core/src/private/mem_overlap.o build/temp.linux-x86_64-3.5/numpy/core/src/private/ufunc_override.o -L/opt/rh/rh-python35/root/usr/lib64 -Lbuild/temp.linux-x86_64-3.5 -lnpymath -lm -lpython3.5m -o build/lib.linux-x86_64-3.5/numpy/core/umath.cpython-35m-x86_64-linux-gnu.so 
    building 'numpy.core.umath_tests' extension 
    compiling C sources 
    C compiler: gcc -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -I/opt/rh/rh-python35/root/usr/include -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC 

    compile options: '-DNPY_INTERNAL_BUILD=1 -DHAVE_NPY_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -Inumpy/core/include -Ibuild/src.linux-x86_64-3.5/numpy/core/include/numpy -Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/opt/rh/rh-python35/root/usr/include/python3.5m -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -c' 
    gcc: build/src.linux-x86_64-3.5/numpy/core/src/umath/umath_tests.c 
    gcc -pthread -shared -L/opt/rh/rh-python35/root/usr/lib64-Wl,-z,relro build/temp.linux-x86_64-3.5/build/src.linux-x86_64-3.5/numpy/core/src/umath/umath_tests.o -L/opt/rh/rh-python35/root/usr/lib64 -Lbuild/temp.linux-x86_64-3.5 -lpython3.5m -o build/lib.linux-x86_64-3.5/numpy/core/umath_tests.cpython-35m-x86_64-linux-gnu.so 
    building 'numpy.core.test_rational' extension 
    compiling C sources 
    C compiler: gcc -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -I/opt/rh/rh-python35/root/usr/include -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC 

    compile options: '-DNPY_INTERNAL_BUILD=1 -DHAVE_NPY_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 -Inumpy/core/include -Ibuild/src.linux-x86_64-3.5/numpy/core/include/numpy -Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -I/opt/rh/rh-python35/root/usr/include/python3.5m -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -Ibuild/src.linux-x86_64-3.5/numpy/core/src/private -Ibuild/src.linux-x86_64-3.5/numpy/core/src/npymath -c' 
    gcc: build/src.linux-x86_64-3.5/numpy/core/src/umath/test_rational.c 
    gcc -pthread -shared -L/opt/rh/rh-python35/root/usr/lib64-Wl,-z,relro build/temp.linux-x86_64-3.5/build/src.linux-x86_64-3.5/numpy/core/src/umath/test_rational.o -L/opt/rh/rh-python35/root/usr/lib64 -Lbuild/temp.linux-x86_64-3.5 -lpython3.5m -o build/lib.linux-x86_64-3.5/numpy/core/test_rational.cpython-35m-x86_64-linux-gnu.so 
    building 'numpy.core.struct_ufunc_test' extension 
    compiling C sources 
    C compiler: gcc -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -I/opt/rh/rh-python35/root/usr/include -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC 
... 
     Removing source in /tmp/pip-build-12s9oqxb/numpy 
    Successfully installed numpy-1.13.0 
    Cleaning up... 

Answer 1

我注意到相同的行为，但它似乎通过升级点子来解决。

默认情况下，rh-python35似乎随pip 7.1.0一起提供，并且pip警告9.0.1可用。升级到这似乎解决了与numpy（和其他类似问题的包）的问题，它现在可以快速安装，并具有与Python 2.7类似的日志签名：

[confuser@es-node-0 ~]$ python -m venv myenv 
[confuser@es-node-0 ~]$ source myvenv/bin/activate 
(myvenv) [confuser@es-node-0 ~]$ pip --version 
pip 7.1.0 from /home/confuser/virtso/lib64/python3.5/site-packages (python 3.5) 
(myvenv) [confuser@es-node-0 ~]$ pip install --upgrade pip 
You are using pip version 7.1.0, however version 9.0.1 is available. 
You should consider upgrading via the 'pip install --upgrade pip' command. 
Collecting pip 
    Using cached pip-9.0.1-py2.py3-none-any.whl 
Installing collected packages: pip 
    Found existing installation: pip 7.1.0 
Uninstalling pip-7.1.0: 
    Successfully uninstalled pip-7.1.0 
Successfully installed pip-9.0.1 
(myvenv) [confuser@es-node-0 ~]$ time pip install numpy -v 
Collecting numpy 
    Using cached numpy-1.13.0-cp35-cp35m-manylinux1_x86_64.whl 
Installing collected packages: numpy 

..... 

Skipping link https://pypi.python.org/packages/ff/9e/54a8f4abbe80db332b4574e67fec52f3018d5f246077c8348bcc9ec79e3e/numpy-1.12.0rc2-cp35-none-win32.whl#md5=320ba3c9eb8c9c83527d12362cb3dced (from https://pypi.python.org/simple/numpy/); it is not compatible with this Python 
    Using version 1.13.0 (newest of versions: 1.3.0, 1.4.1, 1.5.0, 1.5.1, 1.6.0, 1.6.1, 1.6.2, 1.7.0, 1.7.1, 1.7.2, 1.8.0, 1.8.1, 1.8.2, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.10.0, 1.10.0.post2, 1.10.1, 1.10.2, 1.10.3, 1.10.4, 1.11.0, 1.11.1, 1.11.2, 1.11.3, 1.12.0, 1.12.1, 1.13.0) 
    Looking up "https://pypi.python.org/packages/f0/b9/50edeee58c1bed8db12c636f890547e5de33c12ffc4214cf5531c34ba0b1/numpy-1.13.0-cp35-cp35m-manylinux1_x86_64.whl" in the cache 
    Current age based on date: 723 
    Freshness lifetime from max-age: 31557600 
    The response is "fresh", returning cached response 
    31557600 > 723 
    Using cached numpy-1.13.0-cp35-cp35m-manylinux1_x86_64.whl 
    Downloading from URL https://pypi.python.org/packages/f0/b9/50edeee58c1bed8db12c636f890547e5de33c12ffc4214cf5531c34ba0b1/numpy-1.13.0-cp35-cp35m-manylinux1_x86_64.whl#md5=d6e6af5f3f5b5711501045b63e8281f4 (from https://pypi.python.org/simple/numpy/) (requires-python:>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*) 
Installing collected packages: numpy 

Successfully installed numpy-1.13.0 
Cleaning up... 

real 0m2.817s 
user 0m2.286s 
sys 0m0.384s 
(myvenv) [confuser@es-node-0 ~]$