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DS-1000 / 441 / I just want to check if a numpy array contains a single number quickly similar…

Problem

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Problem:
I just want to check if a numpy array contains a single number quickly similar to contains for a list. Is there a concise way to do this?
a = np.array(9,2,7,0)
a.contains(0)  == true
A:
<code>
import numpy as np
a = np.array([9, 2, 7, 0])
number = 0
</code>
is_contained = ... # put solution in this variable
BEGIN SOLUTION
<code>

library

Numpy

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Source and history

upstream_id / Original problem ID
441
task_id
b2f2ae89-6107-5ab9-a7ea-6e6b86ed454a
task_key
default--test--441
task_revision_id
1
config / split
default / test

Official source

initial import