Hi! I'm using Craig Finch Sage Beginner's Guide to learn to use Sage.
However, when I ran the following code (both in the notebook and terminal
mode)
sage: var('x')
x
sage: sinc(x) = sin(x)/x
sage: plot(sinc, (x, -10, 10))
the following error appeared (terminal mode)
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-4-04a086d308e2> in <module>()
----> 1 plot(sinc, (x, -Integer(10), Integer(10)))
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/displayhook
.pyc in __call__(self, result)
250 self.start_displayhook()
251 self.write_output_prompt()
--> 252 format_dict, md_dict = self.compute_format_data(result)
253 self.write_format_data(format_dict, md_dict)
254 self.update_user_ns(result)
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/displayhook
.pyc in compute_format_data(self, result)
152
153 """
--> 154 return self.shell.display_formatter.format(result)
155
156 def write_format_data(self, format_dict, md_dict=None):
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/formatters.pyc
in format(self, obj, include, exclude)
198 md = None
199 try:
--> 200 data = formatter(obj)
201 except:
202 # FIXME: log the exception
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc
in __call__(self, obj)
518 sage: fmt.set_display('simple')
519 """
--> 520 if self.try_format_graphics(obj):
521 return ''
522 s = self.try_format_obj(obj)
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc
in try_format_graphics(self, obj)
415 from sage.structure.sage_object import SageObject
416 if isinstance(obj, SageObject) and hasattr(obj, '_graphics_'
):
--> 417 return obj._graphics_()
418 return False
419
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in _graphics_(self)
822 Graphics object consisting of 0 graphics primitives]
823 """
--> 824 self.show()
825 return True
826
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
in wrapper(*args, **kwds)
469 kwds[self.name + "options"] = suboptions
470
--> 471 return func(*args, **kwds)
472
473 #Add the options specified by @options to the signature of
the wrapped
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in show(self, filename, linkmode, **kwds)
1816 filename = graphics_filename()
1817
-> 1818 self.save(filename, **kwds)
1819
1820 if sage.plot.plot.EMBEDDED_MODE:
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
in wrapper(*args, **kwds)
469 kwds[self.name + "options"] = suboptions
470
--> 471 return func(*args, **kwds)
472
473 #Add the options specified by @options to the signature of
the wrapped
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in save(self, filename, **kwds)
2893 SageObject.save(self, filename)
2894 else:
-> 2895 from matplotlib import rcParams
2896 rc_backup = (rcParams['ps.useafm'],
rcParams['pdf.use14corefonts'],
2897 rcParams['text.usetex']) # save the
rcParams
/home/myorro/Sage/local/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/__init__.py
in <module>()
154 # cbook must import matplotlib only within function
155 # definitions, so it is safe to import from it here.
--> 156 from matplotlib.cbook import is_string_like
157 from matplotlib.compat import subprocess
158
/home/myorro/Sage/local/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/cbook.py
in <module>()
26 from weakref import ref, WeakKeyDictionary
27
---> 28 import numpy as np
29 import numpy.ma as ma
30
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/__init__.pyc in
<module>()
151 return loader(*packages, **options)
152
--> 153 from . import add_newdocs
154 __all__ = ['add_newdocs', 'ModuleDeprecationWarning']
155
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/add_newdocs.py in
<module>()
11 from __future__ import division, absolute_import, print_function
12
---> 13 from numpy.lib import add_newdoc
14
15
###############################################################################
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/lib/__init__.py
in <module>()
16
17 from . import scimath as emath
---> 18 from .polynomial import *
19 #import convertcode
20 from .utils import *
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/lib/polynomial.py
in <module>()
17 from numpy.lib.function_base import trim_zeros, sort_complex
18 from numpy.lib.type_check import iscomplex, real, imag
---> 19 from numpy.linalg import eigvals, lstsq, inv
20
21 class RankWarning(UserWarning):
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/linalg/__init__.py
in <module>()
48 from .info import __doc__
49
---> 50 from .linalg import *
51
52 from numpy.testing import Tester
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/linalg/linalg.py
in <module>()
27 )
28 from numpy.lib import triu, asfarray
---> 29 from numpy.linalg import lapack_lite, _umath_linalg
30 from numpy.matrixlib.defmatrix import matrix_power
31 from numpy.compat import asbytes
ImportError: libgfortran.so.3: cannot open shared object file: No such file
or directory
I didn't really understand what happened, so I ran the same plot code
again, and this is what appeared
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-5-04a086d308e2> in <module>()
----> 1 plot(sinc, (x, -Integer(10), Integer(10)))
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/displayhook
.pyc in __call__(self, result)
250 self.start_displayhook()
251 self.write_output_prompt()
--> 252 format_dict, md_dict = self.compute_format_data(result)
253 self.write_format_data(format_dict, md_dict)
254 self.update_user_ns(result)
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/displayhook
.pyc in compute_format_data(self, result)
152
153 """
--> 154 return self.shell.display_formatter.format(result)
155
156 def write_format_data(self, format_dict, md_dict=None):
/home/myorro/Sage/local/lib/python2.7/site-packages/IPython/core/formatters.pyc
in format(self, obj, include, exclude)
198 md = None
199 try:
--> 200 data = formatter(obj)
201 except:
202 # FIXME: log the exception
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc
in __call__(self, obj)
518 sage: fmt.set_display('simple')
519 """
--> 520 if self.try_format_graphics(obj):
521 return ''
522 s = self.try_format_obj(obj)
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/displayhook.pyc
in try_format_graphics(self, obj)
415 from sage.structure.sage_object import SageObject
416 if isinstance(obj, SageObject) and hasattr(obj, '_graphics_'
):
--> 417 return obj._graphics_()
418 return False
419
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in _graphics_(self)
822 Graphics object consisting of 0 graphics primitives]
823 """
--> 824 self.show()
825 return True
826
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
in wrapper(*args, **kwds)
469 kwds[self.name + "options"] = suboptions
470
--> 471 return func(*args, **kwds)
472
473 #Add the options specified by @options to the signature of
the wrapped
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in show(self, filename, linkmode, **kwds)
1816 filename = graphics_filename()
1817
-> 1818 self.save(filename, **kwds)
1819
1820 if sage.plot.plot.EMBEDDED_MODE:
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
in wrapper(*args, **kwds)
469 kwds[self.name + "options"] = suboptions
470
--> 471 return func(*args, **kwds)
472
473 #Add the options specified by @options to the signature of
the wrapped
/home/myorro/Sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
in save(self, filename, **kwds)
2893 SageObject.save(self, filename)
2894 else:
-> 2895 from matplotlib import rcParams
2896 rc_backup = (rcParams['ps.useafm'],
rcParams['pdf.use14corefonts'],
2897 rcParams['text.usetex']) # save the
rcParams
/home/myorro/Sage/local/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/__init__.py
in <module>()
154 # cbook must import matplotlib only within function
155 # definitions, so it is safe to import from it here.
--> 156 from matplotlib.cbook import is_string_like
157 from matplotlib.compat import subprocess
158
/home/myorro/Sage/local/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/cbook.py
in <module>()
26 from weakref import ref, WeakKeyDictionary
27
---> 28 import numpy as np
29 import numpy.ma as ma
30
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/__init__.py in
<module>()
151 return loader(*packages, **options)
152
--> 153 from . import add_newdocs
154 __all__ = ['add_newdocs', 'ModuleDeprecationWarning']
155
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/add_newdocs.py in
<module>()
11 from __future__ import division, absolute_import, print_function
12
---> 13 from numpy.lib import add_newdoc
14
15
###############################################################################
/home/myorro/Sage/local/lib/python2.7/site-packages/numpy/lib/__init__.py
in <module>()
15 from .ufunclike import *
16
---> 17 from . import scimath as emath
18 from .polynomial import *
19 #import convertcode
ImportError: cannot import name scimath
I'm sorry if I'm making you look at all the error reports. But I don't
really know how to troubleshoot these kinds of errors yet. Can anyone
please help me
(1) understand the problem
(2) fix the error
so that I may be able to try and fix something similar by myself in the
future?
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