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数组简单操作
数组简单操作
mac
2022-06-30
107
a
=
[
3
,
4
]
a
=
a
+
[
5
,
6
]
# [3, 4, 5, 6]
a
=
[
3
,
4
]
a
.
extend
(
[
5
,
6
]
)
# [3, 4, 5, 6]
a
=
[
3
,
4
]
a
.
append
(
5
)
a
.
append
(
6
)
# [3, 4, 5, 6]
list()
import
itertools
as
it it
.
chain
(
*
[
[
3
，
4
]
,
[
5
，
6
]
]
)
# out: <itertools.chain at 0x22d920442e8>
import
numpy
as
np np
.
concatenate
(
(
[
3
,
4
]
,
[
5
,
6
]
)
)
# out: array([3, 4, 5, 6])
import
numpy
as
np np
.
hstack
(
(
[
3
,
4
]
,
[
5
,
6
]
)
)
# out: array([3, 4, 5, 6])
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