pandas.RangeIndex

class pandas.RangeIndex(start=None, stop=None, step=None, dtype=None, copy=False, name=None)

Immutable Index implementing a monotonic integer range.

RangeIndex is a memory-saving special case of an Index limited to representing monotonic ranges with a 64-bit dtype. Using RangeIndex may in some instances improve computing speed.

This is the default index type used by DataFrame and Series when no explicit index is provided by the user.

Parameters:

startint (default: 0), range, or other RangeIndex instance

If int and “stop” is not given, interpreted as “stop” instead.

stopint (default: 0)

The end value of the range (exclusive).

stepint (default: 1)

The step size of the range.

dtypenp.int64

Unused, accepted for homogeneity with other index types.

copybool, default False

Unused, accepted for homogeneity with other index types.

nameobject, optional

Name to be stored in the index.

Attributes

start	The value of the start parameter (0 if this was not supplied).
stop	The value of the stop parameter.
step	The value of the step parameter (1 if this was not supplied).

Methods

from_range(data[, name, dtype])

Create pandas.RangeIndex from a range object.

See also

Index

The base pandas Index type.

Examples

>>> list(pd.RangeIndex(5))
[0, 1, 2, 3, 4]

>>> list(pd.RangeIndex(-2, 4))
[-2, -1, 0, 1, 2, 3]

>>> list(pd.RangeIndex(0, 10, 2))
[0, 2, 4, 6, 8]

>>> list(pd.RangeIndex(2, -10, -3))
[2, -1, -4, -7]

>>> list(pd.RangeIndex(0))
[]

>>> list(pd.RangeIndex(1, 0))
[]