read_csv, as_dates example

example.txt

read dumb data into heterogeneous container

        manufacturer    model   hwy     displ   year    cyl     drv     cty     trans   fl      class
        (str)   (str)   (int)   (num)   (date)  (int)   (str)   (int)   (str)   (str)   (str)
0       audi    a4      29      1.8     1999    4       f       18      auto(l5)        p       compact
1       audi    a4      29      1.8     1999    4       f       21      manual(m5)      p       compact
2       audi    a4      31      2       2008    4       f       20      manual(m6)      p       compact
3       audi    a4      30      2       2008    4       f       21      auto(av)        p       compact
4       audi    a4      26      2.8     1999    6       f       16      auto(l5)        p       compact
5       audi    a4      26      2.8     1999    6       f       18      manual(m5)      p       compact