DataFrame.to_numpy

DataFrame.to_numpy(dtype=None, copy=False, na_value=)
将DataFrame转换为NumPy数组。

Parameters

dtype 要传递给 numpy.asarray() 的dtype
copy False：并不能确保to_numpy()是非复制的；True：确保制作副本
na_value 用于缺失值的值

Example

  1. import pandas as pd
  3. df = pd.DataFrame({'site':['google', 'baidu', 'wiki', 'pandas'],
  4.                     'age':[18, 39, 22, 45],
  5.                     'price': [1.0, 2.0, 3.0, 4.0],
  6.                     'color': ['red', 'black', None, 'red']}, index=['first', 'second', 'third', 'forth'])
  7. df.to_numpy()
  8. ------------------------------------------------------
  9. array([['google', 18, 1.0, 'red'],
  10.        ['baidu', 39, 2.0, 'black'],
  11.        ['wiki', 22, 3.0, None],
  12.        ['pandas', 45, 4.0, 'red']], dtype=object)