pandas.Index

class pandas.Index

Immutable ndarray implementing an ordered, sliceable set. The basic object storing axis labels for all pandas objects

Parameters:

data : array-like (1-dimensional)

dtype : NumPy dtype (default: object)

copy : bool

Make a copy of input ndarray

name : object

Name to be stored in the index

tupleize_cols : bool (default: True)

When True, attempt to create a MultiIndex if possible

Notes

An Index instance can only contain hashable objects

Attributes

T	return the transpose, which is by definition self
base	return the base object if the memory of the underlying data is shared
data	return the data pointer of the underlying data
flags
has_duplicates
is_monotonic	alias for is_monotonic_increasing (deprecated)
is_monotonic_decreasing	return if the index is monotonic decreasing (only equal or
is_monotonic_increasing	return if the index is monotonic increasing (only equal or
itemsize	return the size of the dtype of the item of the underlying data
names
nbytes	return the number of bytes in the underlying data
ndim	return the number of dimensions of the underlying data, by definition 1
nlevels
shape	return a tuple of the shape of the underlying data
size	return the number of elements in the underlying data
strides	return the strides of the underlying data
values	return the underlying data as an ndarray

asi8
dtype
inferred_type
is_all_dates
is_unique
name

Methods

all(*args, **kwargs)	Return whether all elements are True
any(*args, **kwargs)	Return whether any element is True
append(other)	Append a collection of Index options together
argmax([axis])	return a ndarray of the maximum argument indexer
argmin([axis])	return a ndarray of the minimum argument indexer
argsort(*args, **kwargs)	return an ndarray indexer of the underlying data
asof(label)	For a sorted index, return the most recent label up to and including the passed label.
asof_locs(where, mask)	where : array of timestamps
astype(dtype)
copy([names, name, dtype, deep])	Make a copy of this object.
delete(loc)	Make new Index with passed location(-s) deleted
diff(*args, **kwargs)
difference(other)	Compute sorted set difference of two Index objects
drop(labels)	Make new Index with passed list of labels deleted
drop_duplicates([take_last])	Return Index with duplicate values removed
duplicated([take_last])	Return boolean np.array denoting duplicate values
equals(other)	Determines if two Index objects contain the same elements.
factorize([sort, na_sentinel])	Encode the object as an enumerated type or categorical variable
format([name, formatter])	Render a string representation of the Index
get_duplicates()
get_indexer(target[, method, limit])	Compute indexer and mask for new index given the current index.
get_indexer_for(target, **kwargs)	guaranteed return of an indexer even when non-unique
get_indexer_non_unique(target)	return an indexer suitable for taking from a non unique index
get_level_values(level)	Return vector of label values for requested level, equal to the length
get_loc(key[, method])	Get integer location for requested label
get_slice_bound(label, side, kind)	Calculate slice bound that corresponds to given label.
get_value(series, key)	Fast lookup of value from 1-dimensional ndarray.
get_values()	return the underlying data as an ndarray
groupby(to_groupby)	Group the index labels by a given array of values.
hasnans()	return if I have any nans; enables various perf speedups
holds_integer()
identical(other)	Similar to equals, but check that other comparable attributes are
insert(loc, item)	Make new Index inserting new item at location.
intersection(other)	Form the intersection of two Index objects.
is_(other)	More flexible, faster check like is but that works through views
is_boolean()
is_floating()
is_integer()
is_lexsorted_for_tuple(tup)
is_mixed()
is_numeric()
is_object()
is_type_compatible(kind)
isin(values[, level])	Compute boolean array of whether each index value is found in the passed set of values.
item()	return the first element of the underlying data as a python scalar
join(other[, how, level, return_indexers])	Internal API method.
map(mapper)
max()	The maximum value of the object
min()	The minimum value of the object
nunique([dropna])	Return number of unique elements in the object.
order([return_indexer, ascending])	Return sorted copy of Index
putmask(mask, value)	return a new Index of the values set with the mask
ravel([order])	return an ndarray of the flattened values of the underlying data
reindex(target[, method, level, limit])	Create index with target’s values (move/add/delete values as necessary)
rename(name[, inplace])	Set new names on index.
repeat(n)	return a new Index of the values repeated n times
searchsorted(key[, side])	np.ndarray searchsorted compat
set_names(names[, level, inplace])	Set new names on index.
set_value(arr, key, value)	Fast lookup of value from 1-dimensional ndarray.
shift([periods, freq])	Shift Index containing datetime objects by input number of periods and
slice_indexer([start, end, step, kind])	For an ordered Index, compute the slice indexer for input labels and
slice_locs([start, end, step, kind])	Compute slice locations for input labels.
sort(*args, **kwargs)
summary([name])
sym_diff(other[, result_name])	Compute the sorted symmetric difference of two Index objects.
take(indexer[, axis])	return a new Index of the values selected by the indexer
to_datetime([dayfirst])	For an Index containing strings or datetime.datetime objects, attempt
to_native_types([slicer])	slice and dice then format
to_series(**kwargs)	Create a Series with both index and values equal to the index keys
tolist()	return a list of the Index values
transpose()	return the transpose, which is by definition self
union(other)	Form the union of two Index objects and sorts if possible
unique()	Return array of unique values in the object.
value_counts([normalize, sort, ascending, ...])	Returns object containing counts of unique values.
view([cls])