Hello,
this is the first time I write here. I'm using Python + PyQt4 +
matplotlib on Windows 7.
First, I installed Python 2.7 and the other packages. After some time I
decided to go back to 2.6.
I removed any packages (with the uninstaller) and also any PATH entry.
Finally, I installed Python 2.6 and matplotlib.
Now when I execute a script that contain a matplotlib object I run into
this error:
Traceback (most recent call last):
File "C:\Users\Femtotech\Documents\Femtotech\Airlight\Photodiode
array\Software\Photodiode Array Monitor\main.py", line 12, in <module>
from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg as
FigureCanvas
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_qtagg.py",
line 12, in <module>
from backend_qt import qt, FigureManagerQT, FigureCanvasQT,\
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_qt.py",
line 19, in <module>
raise ImportError("Qt backend requires pyqt to be installed.")
ImportError: Qt backend requires pyqt to be installed.
>>>
*** Remote Interpreter Reinitialized ***
>>>
Traceback (most recent call last):
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_qt4.py",
line 215, in resizeEvent
self.draw()
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_qt4agg.py",
line 130, in draw
FigureCanvasAgg.draw(self)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 394, in draw
self.figure.draw(self.renderer)
File
"C:\Development\Python26\lib\site-packages\matplotlib\artist.py", line
55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File
"C:\Development\Python26\lib\site-packages\matplotlib\figure.py", line
798, in draw
func(*args)
File
"C:\Development\Python26\lib\site-packages\matplotlib\artist.py", line
55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Development\Python26\lib\site-packages\matplotlib\axes.py",
line 1934, in draw
a.draw(renderer)
File
"C:\Development\Python26\lib\site-packages\matplotlib\artist.py", line
55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Development\Python26\lib\site-packages\matplotlib\axis.py",
line 1017, in draw
tick.draw(renderer)
File
"C:\Development\Python26\lib\site-packages\matplotlib\artist.py", line
55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Development\Python26\lib\site-packages\matplotlib\axis.py",
line 234, in draw
self.label1.draw(renderer)
File
"C:\Development\Python26\lib\site-packages\matplotlib\artist.py", line
55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "C:\Development\Python26\lib\site-packages\matplotlib\text.py",
line 524, in draw
bbox, info = self._get_layout(renderer)
File "C:\Development\Python26\lib\site-packages\matplotlib\text.py",
line 298, in _get_layout
ismath=False)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 180, in get_text_width_height_descent
font = self._get_agg_font(prop)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 221, in _get_agg_font
font = FT2Font(str(fname))
RuntimeError: Could not open facefile C:\Program Files
(x86)\Python27\lib\site-packages\matplotlib\mpl-data\fonts\ttf\Vera.ttf;
Cannot_Open_Resource
Traceback (most recent call last):
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_qt4agg.py",
line 83, in paintEvent
FigureCanvasAgg.draw(self)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 394, in draw
self.figure.draw(self.renderer)
[cut]
File "C:\Development\Python26\lib\site-packages\matplotlib\text.py",
line 524, in draw
bbox, info = self._get_layout(renderer)
File "C:\Development\Python26\lib\site-packages\matplotlib\text.py",
line 298, in _get_layout
ismath=False)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 180, in get_text_width_height_descent
font = self._get_agg_font(prop)
File
"C:\Development\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
line 221, in _get_agg_font
font = FT2Font(str(fname))
RuntimeError: Could not open facefile C:\Program Files
(x86)\Python27\lib\site-packages\matplotlib\mpl-data\fonts\ttf\Vera.ttf;
Cannot_Open_Resource
You see, "C:\Development\Python26" is the correct folder of the new
installation but "C:\Program Files (x86)\Python27" was the older (and
deleted) one.
I don't know how it still search in the old path. There are no entry of
that folder in the PATH variable.
What should I do to fix the issue? I can't run any program that uses
matplotlib anymore!
Thank in advance!
Marco
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