python prettytable_prettytable安装成功 也报错

将内容如表格方式整齐输出

from prettytable import PrettyTable  
x = PrettyTable(["City name", "Area", "Population", "Annual Rainfall"])  
x.align["City name"] = "l" # Left align city names  
x.padding_width = 1 # One space between column edges and contents (default)  
x.add_row(["Adelaide",1295, 1158259, 600.5])  
x.add_row(["Brisbane",5905, 1857594, 1146.4])  
x.add_row(["Darwin", 112, 120900, 1714.7])  
x.add_row(["Hobart", 1357, 205556, 619.5])  
x.add_row(["Sydney", 2058, 4336374, 1214.8])  
x.add_row(["Melbourne", 1566, 3806092, 646.9])  
x.add_row(["Perth", 5386, 1554769, 869.4])  
print x

结果:
+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
| Adelaide  | 1295 |  1158259   |      600.5      |
| Brisbane  | 5905 |  1857594   |      1146.4     |
| Darwin    | 112  |   120900   |      1714.7     |
| Hobart    | 1357 |   205556   |      619.5      |
| Sydney    | 2058 |  4336374   |      1214.8     |
| Melbourne | 1566 |  3806092   |      646.9      |
| Perth     | 5386 |  1554769   |      869.4      |
+-----------+------+------------+-----------------+

https://code.google.com/p/prettytable/wiki/Tutorial#Selecting_subsets_of_data