title: Python quit unexpectedly when trying to make a simple graph
body: <p>I am running Mac OS X 10.8.4 and Python 2.7.</p>
  
  <p>I just wanted to make a scatter plot graph in python. It runs completely fine until I begin to put in the lines about graph. So when I include window = plt.figure(). </p>
  
  <p>Here is my code:</p>
  
  <pre><code>import csv
  import numpy as np
  import matplotlib.pyplot as plt
  # this program will graph things on a scatter plot
  
  def scatter(filename):
      flux_array =[]
      ratio_array = []
      with open(filename, "U") as csvfile:
          reader = csv.reader(csvfile, delimiter = ',', quoting = csv.QUOTE_NONNUMERIC)
          for row in reader: 
              flux_array.append(row[0])
              ratio_array.append(row[1])
      window = plt.figure()
      plot = window.add_subplot(111, autoscale_on = True) #sets up plot in figure\
      plot.set_title("H-aplha vs. H-alpha/H-beta")
      plot.set_xlabel("H-aplha")
      plot.set_ylabel("ratio")
      plot.scatter(flux_array,ratio_array, 10, "b")
      window.show()
  
  if __name__ == "__main__":
  scatter('/Users/Emily/Documents/MMO_2013/Graphs/sample.csv')
  </code></pre>
  
  <p>Here is the error I get: (sorry it is really long)
  A new window pops up and that has the headline "Python has quit unexpectedly"
  And in the rest of the window it says:</p>
  
  <pre><code>Process:         Python [23039]
  Path:            /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
  Identifier:      org.python.python
  Version:         2.7.0 (2.7.0)
  Code Type:       X86 (Native)
  Parent Process:  Python [23034]
  User ID:         501
  
  Date/Time:       2013-06-20 16:44:34.145 -0400
  OS Version:      Mac OS X 10.8.4 (12E55)
  Report Version:  10
  
  Interval Since Last Report:          14896 sec
  Crashes Since Last Report:           6
  Per-App Interval Since Last Report:  26 sec
  Per-App Crashes Since Last Report:   6
  Anonymous UUID:                      9498690C-E00D-5F98-DA9B-09FF275B2770
  
  Crashed Thread:  0  Dispatch queue: com.apple.main-thread
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000
  
  Application Specific Information:
  abort() called
  
  Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
  
  0   libsystem_kernel.dylib          0x96e0ea6a __pthread_kill + 10
  
  1   libsystem_c.dylib               0x95a9cb2f pthread_kill + 101
  
  2   libsystem_c.dylib               0x95ad34ec abort + 168
  
  3   Tcl                             0x02a9cd93 Tcl_PanicVA + 229
  
  4   Tcl                             0x02a9cdae Tcl_Panic + 27
  
  5   Tcl                             0x02a7324d 0x2a20000 + 340557
  
  6   Tcl                             0x02a68626 TclStackAlloc + 60
  
  7   Tcl                             0x02a94ddf TclResetShadowedCmdRefs + 31
  
  8   Tcl                             0x02a2c35b Tcl_CreateCommand + 432
  
  9   _tkagg.so                       0x029f27e0 _tkinit(_object*, _object*) + 112
  
  10  org.python.python               0x000ca3e0 PyEval_EvalFrameEx + 20720
  
  11  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  12  org.python.python               0x000ca471 PyEval_EvalFrameEx + 20865
  
  13  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  14  org.python.python               0x000ca471 PyEval_EvalFrameEx + 20865
  
  15  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  16  org.python.python               0x00041ca2 function_call + 162
  
  17  org.python.python               0x0000f375 PyObject_Call + 85
  
  18  org.python.python               0x000c7d5b PyEval_EvalFrameEx + 10859
  
  19  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  20  org.python.python               0x00041ca2 function_call + 162
  
  21  org.python.python               0x0000f375 PyObject_Call + 85
  
  22  org.python.python               0x00021c66 instancemethod_call + 422
  
  23  org.python.python               0x0000f375 PyObject_Call + 85
  
  24  org.python.python               0x000c435e PyEval_CallObjectWithKeywords + 78
  
  25  _tkinter.so                     0x00722ccc PythonCmd + 220
  
  26  Tcl                             0x00737377 TclInvokeStringCommand + 135
  
  27  Tcl                             0x00738fc8 TclEvalObjvInternal + 678
  
  28  Tcl                             0x0075e4e5 TclExecuteByteCode + 2050
  
  29  Tcl                             0x0075dc49 Tcl_ExprObj + 1115
  
  30  Tcl                             0x0073b3fa Tcl_ExprBooleanObj + 40
  
  31  Tcl                             0x007418ba Tcl_IfObjCmd + 210
  
  32  Tcl                             0x00738fc8 TclEvalObjvInternal + 678
  
  33  Tcl                             0x0073a061 EvalEx + 926
  
  34  Tcl                             0x00739cbe Tcl_EvalEx + 50
  
  35  Tk                              0x01006b83 Tk_BindEvent + 4036
  
  36  Tk                              0x0100b2ea TkBindEventProc + 295
  
  37  Tk                              0x01012460 Tk_HandleEvent + 1277
  
  38  Tk                              0x0102ab46 TkDoConfigureNotify + 114
  
  39  Tk                              0x0102a9c5 Tk_MakeWindowExist + 331
  
  40  Tk                              0x0102aa63 Tk_MapWindow + 34
  
  41  Tk                              0x0102379b ArrangePacking + 1750
  
  42  Tcl                             0x00791309 TclServiceIdle + 61
  
  43  Tcl                             0x0078086d Tcl_DoOneEvent + 337
  
  44  Tk                              0x0100c5e0 Tk_UpdateObjCmd + 135
  
  45  Tcl                             0x00738fc8 TclEvalObjvInternal + 678
  
  46  Tcl                             0x007392fd Tcl_EvalObjv + 118
  
  47  _tkinter.so                     0x00724738 Tkapp_Call + 216
  
  48  org.python.python               0x000ca3e0 PyEval_EvalFrameEx + 20720
  
  49  org.python.python               0x000cbc88 PyEval_EvalFrameEx + 27032
  
  50  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  51  org.python.python               0x000ca471 PyEval_EvalFrameEx + 20865
  
  52  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  53  org.python.python               0x000ca471 PyEval_EvalFrameEx + 20865
  
  54  org.python.python               0x000cbc88 PyEval_EvalFrameEx + 27032
  
  55  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  56  org.python.python               0x000caefa PyEval_EvalFrameEx + 23562
  
  57  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  58  org.python.python               0x00041ca2 function_call + 162
  
  59  org.python.python               0x0000f375 PyObject_Call + 85
  
  60  org.python.python               0x000c7d5b PyEval_EvalFrameEx + 10859
  
  61  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  62  org.python.python               0x000ca471 PyEval_EvalFrameEx + 20865
  
  63  org.python.python               0x000cc4ba PyEval_EvalCodeEx + 2042
  
  64  org.python.python               0x000cc647 PyEval_EvalCode + 87
  
  65  org.python.python               0x000f24bf PyRun_StringFlags + 287
  
  66  org.python.python               0x000f25be PyRun_SimpleStringFlags + 78
  
  67  org.python.python               0x00109db8 Py_Main + 1512
  
  68  org.python.python               0x00001f82 0x1000 + 3970
  
  69  org.python.python               0x00001ea9 0x1000 + 3753
  
  Threads 1-6 ...
  
  Thread 0 crashed with X86 Thread State (32-bit):
    eax: 0x00000000  ebx: 0x02ad639d  ecx: 0xbfffba8c  edx: 0x96e0ea6a
    edi: 0xac6efa28  esi: 0x00000006  ebp: 0xbfffbaa8  esp: 0xbfffba8c
     ss: 0x00000023  efl: 0x00000206  eip: 0x96e0ea6a   cs: 0x0000000b
     ds: 0x00000023   es: 0x00000023   fs: 0x00000000   gs: 0x0000000f
    cr2: 0x02ad639d
  Logical CPU: 0
  
  Binary Images:
      0x1000 -     0x1ff5 +org.python.python (2.7.0 - 2.7.0) &lt;E493A842-C949-A532-656D-BC10750CCB80&gt; /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
      0x5000 -   0x142fe3 +org.python.python (2.7.0, [c] 2004-2008 Python Software Foundation. - 2.7.0) &lt;2815ECAD-BE96-97DE-C757-303EB571862B&gt; /Library/Frameworks/Python.framework/Versions/2.7/Python
    0x2d6000 -   0x2d7fff +time.so (???) &lt;36AF5C9C-9495-3868-8A5A-4706C959F102&gt; 
  a lot more lines like this...
  /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_locale.so
   0x1554000 -  0x1556ff5 +_csv.so (???) &lt;A4454B5F-D112-B662-F4A5-9B2E3C630DD2&gt; /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_csv.so
   0x161c000 -  0x16bdff9  multiarray.so (27.4) &lt;3A9DA8B8-2C58-3FB0-B491-968A52101BA4&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/multiarray.so
   0x16d1000 -  0x1708ffe  umath.so (27.4) &lt;F31C1D02-F34A-36F5-847C-16CB5DC6610A&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/umath.so
   0x1714000 -  0x1725ff7  _sort.so (27.4) &lt;36D7E10C-CC33-3A4A-9717-29F165644354&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/_sort.so
   0x176a000 -  0x176efff  _dotblas.so (27.4) &lt;C457183A-71CF-39AF-BEDD-8874CB2D190C&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/_dotblas.so
   0x1772000 -  0x178cff0  scalarmath.so (27.4) &lt;078B9F29-CD28-3635-BCBC-4CFC6B392BEA&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/scalarmath.so
   0x1791000 -  0x1791ff5 +_weakref.so (???) &lt;CC5A6874-5A1A-4431-FB8B-3CA18F0DDE5D&gt; 
  more lines like this...
   0x2e22000 -  0x2e23ffd  com.apple.ironwoodcore (1.1.1 - 1.1.1) &lt;098CE576-3239-3B41-9141-A5BE6E476C84&gt; /System/Library/PrivateFrameworks/SpeechObjects.framework/Versions/A/Frameworks/DictationServicesCore.framework/DictationServicesCore
  0x8fe75000 - 0x8fea7e57  dyld (210.2.3) &lt;23516BE4-29BE-350C-91C9-F36E7999F0F1&gt; /usr/lib/dyld
  0x90007000 - 0x9000ffff  libcopyfile.dylib (89) &lt;4963541B-0254-371B-B29A-B6806888949B&gt; /usr/lib/system/libcopyfile.dylib
  a lot more lines like this...
  /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib
  
  External Modification Summary:
    Calls made by other processes targeting this process:
      task_for_pid: 2
      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: 818
      thread_create: 1
      thread_set_state: 0
  Model: MacBookPro7,1, BootROM MBP71.0039.B0E, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB, SMC 1.62f7
  Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MB
  Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
  Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
  AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (5.106.98.100.17)
  </code></pre>
  
  <p>I have googled this quite a bit, but there aren't any answers really.</p>
  
  <p>Thanks!</p>