python - matplotlib 基础问题

Question

请原谅我的简单问题。我刚开始使用 Matplotlib，但遇到了一些困难。

我可以毫无问题地使用解释器运行以下命令:

>>> from pylab import *  
>>> plot([1,2,3])  
>>> show()  

上面的代码生成了一个漂亮的图形。

但是，如果我将以下代码放入一个文件中并运行它，则会出现错误:

#!/usr/bin/env python
# encoding: utf-8

import sys
import os
from pylab import *

plot([1,2,3])
show()

这是错误信息:

Traceback (most recent call last):
  File "/Users/sbrown/Desktop/new1.py", line 12, in <module>
    from pylab import *
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/__init__.py", line 133, in <module>
    from matplotlib.rcsetup import (defaultParams,
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/rcsetup.py", line 19, in <module>
    from matplotlib.colors import is_color_like
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/colors.py", line 54, in <module>
    import matplotlib.cbook as cbook
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/cbook.py",     line 15, in <module>
    import new
  File "/Users/sbrown/Desktop/new.py", line 2, in <module>
    plot([1,2,3])
NameError: name 'plot' is not defined
>>> 

知道问题出在哪里吗？提前感谢您提供的任何帮助!

Answer 1

看起来您的桌面上有一个文件正在隐藏标准 Python new 模块:

>>> import new
>>> new
<module 'new' from '/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/new.pyc'>

重命名或删除 $HOME/Desktop/new.py 并重试。