DataFrame.head

DataFrame.head(n=5)
返回前n行。
对于n的负值，此函数返回除最后n行之外的所有行，相当于：df[:, -n]

Parameters

Example

import pandas as pd
df = pd.DataFrame({'site':['google', 'baidu', 'wiki', 'pandas'],
                    'age':[18, 39, 22, 45],
                    'price': [1.0, 2.0, 3.0, 4.0],
                    'color': ['red', 'black', None, 'red']})
df.head(3)
-----------------------------------------------------------------
    site    age    price    color
0    google    18    1.0        red
1    baidu    39    2.0        black
2    wiki    22    3.0        None

Example

import pandas as pd
df = pd.DataFrame({'site':['google', 'baidu', 'wiki', 'pandas'],
                    'age':[18, 39, 22, 45],
                    'price': [1.0, 2.0, 3.0, 4.0],
                    'color': ['red', 'black', None, 'red']})
df.head(-2)
---------------------------------------------------------
    site    age    price    color
0    google    18    1.0        red
1    baidu    39    2.0        black