좋은 코드에도 불구하고 Pyx 모듈이있는 파이썬 오류

사용자 정의 가능한 데이터 그래프 및 시각화를위한 Python 모듈 인 pyx로 작업을 수행하고 있습니다. 문제는 가장 기본적인 그래프 코드 예제를 직접 복사하여 붙여 넣어도 손상된 파일과 오류를 반환한다는 것입니다. Im 비교적 파이썬에 익숙하지 않고 이전에 이와 같은 오류를 본 적이 없습니다. 내 머리 위로 waaaaay입니다. 전에 간단한 캔버스 그리기를 실행했는데 제대로 작동했습니다. 여기서 무슨 일이야?

암호:

from pyx import *
g = graph.graphxy(width=10,
                  x=graph.axis.linear(min=-2, max=2)
                  )
g.plot(graph.data.function("y(x)=x**2"))
g.writeEPSfile("x") 

빨간색 오류 텍스트 :

Traceback (most recent call last):
  File "C:\Users\User\Desktop\test.py", line 9, in <module>
    g.writeEPSfile("x")
  File "C:\Python34\lib\site-packages\pyx\canvas.py", line 50, in wrappedindocument
    return method(d, file, **write_kwargs)
  File "C:\Python34\lib\site-packages\pyx\document.py", line 180, in writeEPSfile
    pswriter.EPSwriter(self, f, **kwargs)
  File "C:\Python34\lib\site-packages\pyx\pswriter.py", line 142, in __init__
    page.processPS(pagefile, self, acontext, registry, pagebbox)
  File "C:\Python34\lib\site-packages\pyx\document.py", line 130, in processPS
    self._process("processPS", *args)
  File "C:\Python34\lib\site-packages\pyx\document.py", line 78, in _process
    bbox.set(self.canvas.bbox()) # this bbox is not accurate
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 181, in bbox
    self.finish()
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 303, in finish
    self.doaxes()
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 580, in doaxes
    self.dolayout()
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 564, in dolayout
    self.doaxiscreate(axisname)
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 240, in doaxiscreate
    self.axes[axisname].create()
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 620, in create
    self.linkedto.docreate()
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 525, in docreate
    self._createfunction(*self._createargs, **self._createkwargs)
  File "C:\Python34\lib\site-packages\pyx\graph\graph.py", line 240, in doaxiscreate
    self.axes[axisname].create()
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 591, in create
    self.canvas = self.axis.create(self.data, self.positioner, self.graphtexrunner, self.errorname)
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 250, in create
    return _regularaxis._create(self, data, positioner, graphtexrunner, self.parter, self.rater, errorname)
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 220, in _create
    variants[0].storedcanvas = layout(variants[0])
  File "C:\Python34\lib\site-packages\pyx\graph\axis\axis.py", line 141, in layout
    self.painter.paint(canvas, data, self, positioner)
  File "C:\Python34\lib\site-packages\pyx\graph\axis\painter.py", line 192, in paint
    t.temp_labelbox = canvas.texrunner.text_pt(t.temp_x_pt, t.temp_y_pt, t.label, labelattrs)
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1408, in wrapped
    return f(self, *args, **kwargs)
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1439, in text_pt
    return self.instance.text_pt(*args, **kwargs)
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1261, in text_pt
    left_pt, right_pt, height_pt, depth_pt = self.do_typeset(expr, self.texmessages_run_default + self.texmessages_run + texmessages)
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1184, in do_typeset
    self.do_start()
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1326, in do_start
    super().do_start()
  File "C:\Python34\lib\site-packages\pyx\text.py", line 1139, in do_start
    self.popen = config.Popen(cmd, stdin=config.PIPE, stdout=config.PIPE, stderr=config.STDOUT, bufsize=0)
  File "C:\Python34\lib\site-packages\pyx\config.py", line 190, in Popen
    return subprocess.Popen(cmd, *args, **kwargs)
  File "C:\Python34\lib\subprocess.py", line 858, in __init__
    restore_signals, start_new_session)
  File "C:\Python34\lib\subprocess.py", line 1111, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified