help(pd.concat)
Help on function concat in module pandas.tools.merge:
help(pd.concat)
Help on function concat in module pandas.tools.merge:
concat(objs, axis=0, join='outer', join_axes=None, ignore_index=False, keys=None, levels=None, names=None, verify_integrity=False, copy=True)
Concatenate pandas objects along a particular axis with optional set logic
along the other axes. Can also add a layer of hierarchical indexing on the
concatenation axis, which may be useful if the labels are the same (or
overlapping) on the passed axis number
是按行组装多个表格的
Parameters
----------
objs : a sequence or mapping of Series, DataFrame, or Panel objects
If a dict is passed, the sorted keys will be used as the `keys`
argument, unless it is passed, in which case the values will be
selected (see below). Any None objects will be dropped silently unless
they are all None in which case a ValueError will be raised
axis : { 0, 1, ...}, default 0
The axis to concatenate along
join : { 'inner', 'outer'}, default 'outer'
How to handle indexes on other axis(es)
join_axes : list of Index objects
Specific indexes to use for the other n - 1 axes instead of performing
inner/outer set logic
verify_integrity : boolean, default False
Check whether the new concatenated axis contains duplicates. This can
be very expensive relative to the actual data concatenation
keys : sequence, default None
If multiple levels passed, should contain tuples. Construct
hierarchical index using the passed keys as the outermost level
levels : list of sequences, default None
Specific levels (unique values) to use for constructing a
MultiIndex. Otherwise they will be inferred from the keys
names : list, default None
Names for the levels in the resulting hierarchical index
ignore_index : boolean, default False
If True, do not use the index values along the concatenation axis. The
resulting axis will be labeled 0, ..., n - 1. This is useful if you are
concatenating objects where the concatenation axis does not have
meaningful indexing information. Note the index values on the other
axes are still respected in the join.
copy : boolean, default True
If False, do not copy data unnecessarily
Notes
-----
The keys, levels, and names arguments are all optional
Returns
-------
concatenated : type of objects
series 是一个有序的字典,因此索引即可是关键字,也可是下标序号
series 的索引不知是整数:
标签名 标签名的list 标签名的切片(尾端包含)
下标 下标的list 下标的切片(尾端不包含)
布尔型数组
即一个有 一个没有的索引 运算和为nan