Python 尝试导入 pylab 时出现“导入错误：没有名为 pytz 的模块”？
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'ImportError: No module named pytz' when trying to import pylab?
提问by nale
As far as I can tell, I don't even need pytz for what I'm doing.
据我所知，我什至不需要 pytz 来完成我正在做的事情。
I'm re-learning python for image processing using the O'Reilly book 'Programming Computer Vision with Python' for work (and I'm also new to mac, so on both counts I apologise if this is a stupid question). Along with a 'empire.jpg' picture, I'm trying to run the script on page 16 which goes as follows:
我正在使用 O'Reilly 的书“使用 Python 编程计算机视觉”重新学习用于图像处理的 Python（我也是 mac 的新手，所以在这两个方面，如果这是一个愚蠢的问题，我深表歉意）。连同“empire.jpg”图片，我正在尝试运行第 16 页上的脚本，如下所示：
from PIL import Image
from pylab import *
# read image to array
im = array(Image.open('empire.jpg')) # plot the image
imshow(im)
# some points
x = [100,100,400,400]
y = [200,500,200,500]
# plot the points with red star-markers
plot(x,y,'r*')
# line plot connecting the first two points
plot(x[:2],y[:2])
# add title and show the plot
title('Plotting: "empire.jpg"')
show()
but I get the following output with an error:
但我得到以下输出错误：
File "plotch1.py", line 2, in <module>
from pylab import *
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/pylab.py", line 1, in <module>
from matplotlib.pylab import *
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/pylab.py", line 208, in <module>
from matplotlib import mpl # pulls in most modules
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/mpl.py", line 4, in <module>
from matplotlib import axes
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/axes.py", line 18, in <module>
from matplotlib import dates as mdates
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/dates.py", line 82, in <module>
import pytz
ImportError: No module named pytz
I'm using OS X 10.9.4. I've installed matplotlib and numpy from macpython.org and I've installed scipy 0.11.0 all for python 2.5.
我使用的是 OS X 10.9.4。我已经从 macpython.org 安装了 matplotlib 和 numpy，并且我已经为 python 2.5 安装了 scipy 0.11.0。
Do I even need pytz? If not, how can I get around this error?
我什至需要 pytz 吗？如果没有，我该如何解决这个错误？
回答by Itay Kahana
pylabrequires pytz.
The easiest way to install a package in Python is to run pip install pytz.
pylab需要pytz。在 Python 中安装包的最简单方法是运行pip install pytz.
Today, Python comes with pip pre-installed, but use these instructions if you need to install it: Installation: Do I need to install pip?
今天，Python 预装了 pip，但如果您需要安装它，请使用以下说明：安装：我需要安装 pip 吗？
回答by Vicrobot
Firstly if you have installed pip then remove it by deleting the folder of pip inside python directory. Then install pip by this command:
首先如果你已经安装了 pip 然后通过删除 python 目录中的 pip 文件夹来删除它。然后通过以下命令安装pip：
$ sudo easy_install pip
Then you need to install pytz again by this command:
然后你需要通过这个命令再次安装pytz：
$ sudo pip install pytz
Don't update pip to 10th version because it might contain bugs which is causing problems.
不要将 pip 更新到第 10 版，因为它可能包含导致问题的错误。
