数据结构
两种核心数据类型,Series和DataFrame。...np.random.randn(3), index=['a', 'b', 'a'])
a -0.127293
b -0.439537
a 0.727805
dtype: float64
Series数据类型...Dict of 1D ndarrays, lists, dicts, or Series
2-D numpy.ndarray
Structured or record ndarray
A Series
Another...copy=True)
Merge. SQL中Join类似操作入口。
>>> pd.merge(left, right,
... how='inner',
......copy=True,
... indicator=False,
... validate=None)
参考
Merge, join, and concatenate