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嘗試安裝matplotlib，我已經收到以下錯誤消息（參見下圖）：易於安裝matplotlib - 缺少腳本的easy_install-xrixnr
C:\Users\UserName>easy_install matplotlib
Searching for matplotlib
Reading http://pypi.python.org/simple/matplotlib/
Reading http://matplotlib.sourceforge.net
Reading https://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0
Reading https://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-0.99.3/
Reading http://sourceforge.net/project/showfiles.php?group_id=80706&package_id=82474
Reading https://sourceforge.net/project/showfiles.php?group_id=80706&package_id=278194
Reading http://sourceforge.net/project/showfiles.php?group_id=80706
Reading https://sourceforge.net/project/showfiles.php?group_id=80706&package_id=82474
Reading https://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-0.99.1/
Reading https://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0.1/
Best match: matplotlib 1.0.1-r0
Downloading http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0.1/matplotlib-1.0.1_r0-py2.6-win32.egg/download
Processing download
error: Couldn't find a setup script in c:\users\username\appdata\local\temp\easy_install-xrixnr\download
環境：Python 2.6中，Win7的64位
任何想法是什麼失蹤？