I recently upgraded Python 3.6.0rc1 over 3.6.0b4. Python would invoke just fine after the update, but following a system restart, I'm experiencing crashes on any invocation of Python. I suspect it's just a bad/corrupted install. I will do more investigation, but here's the report from MacOS.

Process:               Python [3211]
Path:                  /Library/Frameworks/Python.framework/Versions/3.6/Resources/Python.app/Contents/MacOS/Python
Identifier:            Python
Version:               3.6.0rc1 (3.6.0rc1)
Code Type:             X86-64 (Native)
Parent Process:        zsh [990]
Responsible:           Python [3211]
User ID:               501

Date/Time:             2016-12-12 09:36:50.115 -0500
OS Version:            Mac OS X 10.12.1 (16B2657)
Report Version:        12
Anonymous UUID:        31F72BE9-33AC-23C5-6CC1-DA2C20DDA3B2


Time Awake Since Boot: 1400 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fffc65e0dda __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fffc66cc787 pthread_kill + 90
2   libsystem_c.dylib             	0x00007fffc6546420 abort + 129
3   org.python.python             	0x00000001001280d1 Py_FatalError + 65
4   org.python.python             	0x0000000100129e21 _Py_InitializeEx_Private + 1377
5   org.python.python             	0x0000000100146c60 Py_Main + 1376
6   org.python.python             	0x0000000100000dfe 0x100000000 + 3582
7   org.python.python             	0x0000000100000c34 0x100000000 + 3124

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000000000006  rcx: 0x00007fff5bfff448  rdx: 0x0000000000000000
  rdi: 0x0000000000000307  rsi: 0x0000000000000006  rbp: 0x00007fff5bfff470  rsp: 0x00007fff5bfff448
   r8: 0x0000000000000000   r9: 0x0000000000000006  r10: 0x0000000008000000  r11: 0x0000000000000206
  r12: 0x00007fffcf286a20  r13: 0x0000000000000002  r14: 0x00007fffcf2a23c0  r15: 0x00007fff5bfff4d0
  rip: 0x00007fffc65e0dda  rfl: 0x0000000000000206  cr2: 0x00007fffcf284128
  
Logical CPU:     0
Error Code:      0x02000148
Trap Number:     133


Binary Images:
       0x100000000 -        0x100000ff7 +org.python.python (3.6.0rc1 - 3.6.0rc1) <581ACC12-D39B-9ED6-E4C0-DC4709F9A849> /Library/Frameworks/Python.framework/Versions/3.6/Resources/Python.app/Contents/MacOS/Python
       0x100003000 -        0x100225ff7 +org.python.python (3.6.0rc1, [c] 2001-2016 Python Software Foundation. - 3.6.0rc1) <57D55331-6C7E-012A-47A2-5CA85BB2ECAC> /Library/Frameworks/Python.framework/Versions/3.6/Python
    0x7fff60b9d000 -     0x7fff60bda287  dyld (421.2) <F5F79617-5669-3424-A2CF-18B23BB0C0C7> /usr/lib/dyld
    0x7fffb11c3000 -     0x7fffb165cff7  com.apple.CoreFoundation (6.9 - 1348.15) <C25C6FB8-E934-349C-952C-26CF913BAC33> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
    0x7fffc4cdc000 -     0x7fffc4cddff3  libDiagnosticMessagesClient.dylib (102) <422911A4-E273-3E88-BFC4-DF6470E48242> /usr/lib/libDiagnosticMessagesClient.dylib
    0x7fffc4f1b000 -     0x7fffc4f1cff3  libSystem.B.dylib (1238) <F62ED8CF-37FB-30E3-A453-C62BA28CAA07> /usr/lib/libSystem.B.dylib
    0x7fffc502c000 -     0x7fffc502cff3  libauto.dylib (187) <5BBF6A00-CC76-389D-84E7-CA88EDADE683> /usr/lib/libauto.dylib
    0x7fffc504d000 -     0x7fffc50a3ff7  libc++.1.dylib (307.4) <BEE86868-F831-384C-919E-2B286ACFE87C> /usr/lib/libc++.1.dylib
    0x7fffc50a4000 -     0x7fffc50cefff  libc++abi.dylib (307.2) <1CEF8ABB-7E6D-3C2F-8E0A-E7884478DD23> /usr/lib/libc++abi.dylib
    0x7fffc560a000 -     0x7fffc582ffff  libicucore.A.dylib (57132.0.1) <063DBF01-CEF8-3C2E-9917-A08358BB006D> /usr/lib/libicucore.A.dylib
    0x7fffc5bbf000 -     0x7fffc5f8fd97  libobjc.A.dylib (706) <F9AFE665-A3A2-3285-9495-19803A565861> /usr/lib/libobjc.A.dylib
    0x7fffc63b6000 -     0x7fffc63c7ff3  libz.1.dylib (67) <46E3FFA2-4328-327A-8D34-A03E20BFFB8E> /usr/lib/libz.1.dylib
    0x7fffc63d6000 -     0x7fffc63daff7  libcache.dylib (79) <84E55656-FDA9-3B29-9E4F-BE31B2C0AA3C> /usr/lib/system/libcache.dylib
    0x7fffc63db000 -     0x7fffc63e5fff  libcommonCrypto.dylib (60092.20.1) <D2711CB2-2D9A-3238-8082-CDB8AE60017F> /usr/lib/system/libcommonCrypto.dylib
    0x7fffc63e6000 -     0x7fffc63edfff  libcompiler_rt.dylib (62) <486BDE52-81B4-3446-BD72-23977CAE556F> /usr/lib/system/libcompiler_rt.dylib
    0x7fffc63ee000 -     0x7fffc63f6fff  libcopyfile.dylib (138) <0DA49B77-56EC-362D-98FF-FA78CFD986D6> /usr/lib/system/libcopyfile.dylib
    0x7fffc63f7000 -     0x7fffc6479fdb  libcorecrypto.dylib (442.20.2) <9846F683-6CED-3CE5-AE8A-B0A681F7FEEF> /usr/lib/system/libcorecrypto.dylib
    0x7fffc647a000 -     0x7fffc64acfff  libdispatch.dylib (703.20.1) <FDC0F71D-A415-306A-ABE8-CA21E25A55BB> /usr/lib/system/libdispatch.dylib
    0x7fffc64ad000 -     0x7fffc64b2ff3  libdyld.dylib (421.2) <7BFA3476-6210-3BCB-8CE8-9B952F87BD84> /usr/lib/system/libdyld.dylib
    0x7fffc64b3000 -     0x7fffc64b3ffb  libkeymgr.dylib (28) <09CD7CA6-46D2-3A9F-B9F1-7C4CA5CA0D68> /usr/lib/system/libkeymgr.dylib
    0x7fffc64c1000 -     0x7fffc64c1fff  liblaunch.dylib (972.20.3) <7AB2E2EA-8B47-3420-87CE-5EE18A4EEE49> /usr/lib/system/liblaunch.dylib
    0x7fffc64c2000 -     0x7fffc64c7fff  libmacho.dylib (894) <1EAE5ADD-490C-3B1F-9F97-447BA8E0E90F> /usr/lib/system/libmacho.dylib
    0x7fffc64c8000 -     0x7fffc64caff3  libquarantine.dylib (85) <78EF62D8-C890-3FC0-937A-C2FD8CEF8992> /usr/lib/system/libquarantine.dylib
    0x7fffc64cb000 -     0x7fffc64ccffb  libremovefile.dylib (45) <C4FC07FF-ED86-382E-B06F-33C34718080C> /usr/lib/system/libremovefile.dylib
    0x7fffc64cd000 -     0x7fffc64e5ff7  libsystem_asl.dylib (349.1.1) <2217DE86-0635-393E-93DD-A1344EC0EF4B> /usr/lib/system/libsystem_asl.dylib
    0x7fffc64e6000 -     0x7fffc64e6ff7  libsystem_blocks.dylib (67) <B8C3701D-5A91-3D35-999D-2DC8D5393525> /usr/lib/system/libsystem_blocks.dylib
    0x7fffc64e7000 -     0x7fffc6574fef  libsystem_c.dylib (1158.20.4) <FB1702C3-C521-37BD-91CB-559168785D22> /usr/lib/system/libsystem_c.dylib
    0x7fffc6575000 -     0x7fffc6578ffb  libsystem_configuration.dylib (888.20.5) <D7FC38C6-794C-3C26-AE4F-020A72E1BB79> /usr/lib/system/libsystem_configuration.dylib
    0x7fffc6579000 -     0x7fffc657cfff  libsystem_coreservices.dylib (41.2) <ADE57FD1-AFEB-3E86-820D-E4F28330F76A> /usr/lib/system/libsystem_coreservices.dylib
    0x7fffc657d000 -     0x7fffc6595ffb  libsystem_coretls.dylib (121.1.1) <8F7E9B12-400D-3276-A9C5-4546B0258554> /usr/lib/system/libsystem_coretls.dylib
    0x7fffc6596000 -     0x7fffc659cfff  libsystem_dnssd.dylib (765.20.4) <49E37AB9-776C-3F84-8AC2-9BDD0438ED9D> /usr/lib/system/libsystem_dnssd.dylib
    0x7fffc659d000 -     0x7fffc65c6fff  libsystem_info.dylib (503) <C686B834-5E7D-382C-AF6E-44AB78EE83E2> /usr/lib/system/libsystem_info.dylib
    0x7fffc65c7000 -     0x7fffc65e9ff7  libsystem_kernel.dylib (3789.21.4) <651F249F-D797-3FBD-A66F-66DFB48FCF38> /usr/lib/system/libsystem_kernel.dylib
    0x7fffc65ea000 -     0x7fffc6631fe7  libsystem_m.dylib (3121.4) <E3370D16-EBAA-3C7F-AC56-2D6EAD7DB0A4> /usr/lib/system/libsystem_m.dylib
    0x7fffc6632000 -     0x7fffc6650ff7  libsystem_malloc.dylib (116) <3DD17B88-B7A4-38B9-9E95-AB88E1C3B647> /usr/lib/system/libsystem_malloc.dylib
    0x7fffc6651000 -     0x7fffc66a8ff3  libsystem_network.dylib (856.20.4) <0F16BBE0-3092-390E-96D9-0B5DCC97B317> /usr/lib/system/libsystem_network.dylib
    0x7fffc66a9000 -     0x7fffc66b2ff3  libsystem_networkextension.dylib (563.20.3) <C8C8807B-F5C1-307E-8D67-02793B62E9ED> /usr/lib/system/libsystem_networkextension.dylib
    0x7fffc66b3000 -     0x7fffc66bcff3  libsystem_notify.dylib (165.20.1) <D38E3A3C-AEEE-321A-861E-160ABE4B20B4> /usr/lib/system/libsystem_notify.dylib
    0x7fffc66bd000 -     0x7fffc66c5fe7  libsystem_platform.dylib (126.1.2) <884DDF42-3CAE-334A-82CE-965617130FB1> /usr/lib/system/libsystem_platform.dylib
    0x7fffc66c6000 -     0x7fffc66d0ff7  libsystem_pthread.dylib (218.20.1) <F35891AC-CA82-3F97-9BE6-15EC3B4C36F6> /usr/lib/system/libsystem_pthread.dylib
    0x7fffc66d1000 -     0x7fffc66d4ff7  libsystem_sandbox.dylib (592.21.2) <FCF7F7C2-79B5-321F-901D-A190CD3D22A2> /usr/lib/system/libsystem_sandbox.dylib
    0x7fffc66d5000 -     0x7fffc66d6fff  libsystem_secinit.dylib (24) <A54B8FEF-E792-3C54-8E0B-E80A376662F2> /usr/lib/system/libsystem_secinit.dylib
    0x7fffc66d7000 -     0x7fffc66defff  libsystem_symptoms.dylib (532.1.1) <B26F656E-94F9-3834-9B03-51C4FF11D1BF> /usr/lib/system/libsystem_symptoms.dylib
    0x7fffc66df000 -     0x7fffc66ffff7  libsystem_trace.dylib (518.20.8) <046443DA-0474-3A73-A69F-1DC21C49B8AD> /usr/lib/system/libsystem_trace.dylib
    0x7fffc6700000 -     0x7fffc6705ffb  libunwind.dylib (35.3) <9F7C2AD8-A9A7-3DE4-828D-B0F0F166AAA0> /usr/lib/system/libunwind.dylib
    0x7fffc6706000 -     0x7fffc672fff7  libxpc.dylib (972.20.3) <CE86F4BA-EF31-33BD-8AC3-7BF25F632FA9> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 1016
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=130.3M resident=0K(0%) swapped_out_or_unallocated=130.3M(100%)
Writable regions: Total=35.7M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=35.7M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        2 
MALLOC                            19.3M       11 
MALLOC guard page                   16K        4 
VM_ALLOCATE                          4K        2 
__DATA                            3452K       49 
__LINKEDIT                       113.4M        5 
__TEXT                            16.8M       47 
__UNICODE                          556K        2 
__UNIXSTACK                       16.0M        2 
shared memory                        8K        3 
===========                     =======  ======= 
TOTAL                            169.5M      117 

Model: MacBookPro13,2, BootROM MBP132.0226.B00, 2 processors, Intel Core i7, 3.3 GHz, 16 GB, SMC 2.37f18
Graphics: kHW_IntelIrisGraphics550Item, Intel Iris Graphics 550, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, LPDDR3, 2133 MHz, 0x802C, 0x4D5435324C31473332443450472D30393320
Memory Module: BANK 1/DIMM0, 8 GB, LPDDR3, 2133 MHz, 0x802C, 0x4D5435324C31473332443450472D30393320
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x157), Broadcom BCM43xx 1.0 (7.21.171.47.1a8)
Bluetooth: Version 5.0.1f7, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
PCI Card: pci1b21,1142, USB eXtensible Host Controller, Thunderbolt@195,0,0
USB Device: USB 3.0 Bus
USB Device: iBridge
USB Device: USB 3.0 Bus
USB Device: ASM107x
USB Device: TUSB3410 Boot Device
USB Device: Microsoft® LifeCam Cinema(TM)
USB Device: ASM107x
Thunderbolt Bus: MacBook Pro, Apple Inc., 11.9
Thunderbolt Bus: MacBook Pro, Apple Inc., 11.9
Thunderbolt Device: 34UM95, LG Electronics, 3, 24.1