Python for Data Analysis 数据含USDA食品数据库

Python for Data Analysis 各章节示例数据（含USDA食品数据库）

def works_fine（）:
    a = 5
    b = 6
    assert（a + b == 11）

def throws_an_exception（）:
    a = 5
    b = 6
    assert（a + b == 10）

def calling_things（）:
    works_fine（）
    throws_an_exception（）

calling_things（）

 属性            大小     日期    时间   名称
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     目录           0  2018-03-01 17:12  Python for Data Analysis-1st-edition\
     目录           0  2018-03-01 17:13  Python for Data Analysis-1st-edition\pydata-book-1st-edition\
     目录           0  2018-03-01 17:12  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\
     目录           0  2018-03-01 17:12  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\movielens\
     文件      171308  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\movielens\movies.dat
     文件    24594131  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\movielens\ratings.dat
     文件        5189  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\movielens\README
     文件      134368  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\movielens\users.dat
     目录           0  2018-03-01 17:12  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\
     文件        5724  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\NationalReadMe.pdf
     文件       24933  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1880.txt
     文件       24065  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1881.txt
     文件       26559  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1882.txt
     文件       26003  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1883.txt
     文件       28670  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1884.txt
     文件       28625  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1885.txt
     文件       29822  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1886.txt
     文件       29532  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1887.txt
     文件       33065  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1888.txt
     文件       32297  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1889.txt
     文件       33621  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1890.txt
     文件       33186  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1891.txt
     文件       36542  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1892.txt
     文件       35434  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1893.txt
     文件       36817  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1894.txt
     文件       38232  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1895.txt
     文件       38747  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1896.txt
     文件       37936  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1897.txt
     文件       40937  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1898.txt
     文件       38141  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1899.txt
     文件       46898  2017-11-16 00:30  Python for Data Analysis-1st-edition\pydata-book-1st-edition\ch02\names\yob1900.txt
............此处省略177个文件信息