I want to count the designated elements in each array of two-dimensional arrays.

Two-dimensional arrays include:I'd like to count how many numbers are in each array. What should I do?

If anyone knows, please let me know.

Two-dimensional array of interest:

two_array_list=[0,0,0, 'None', [1,1, 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None']

desired output:

 [3,2,0,0]

# or

3
2
0
0

python

2022-09-30 22:00

3 Answers

I think you can use .count.

For example, how about the following?

two_array_list=[0,0,0, 'None', [1,1, 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None']

for list in two_array_list:
    n = list.count ("None")
    print(len(list)-n)

Instead of counting
how many numbers? Counting "How many None" and subtracting that number from each list.

2022-09-30 22:00

Take sum() using int(True)==1, int(False)==0.

 from numbers import Number

two_array_list = [
  [0,0,0, 'None',
  [1, 1, 'None', 'None',
  ['None', 'None', 'None', 'None', 'None',
  ['None', 'None', 'None', 'None']
]

counts = [sum(isinstance(v, Number) for vina) for a two_array_list ]
print(counts)

#=>
[3, 2, 0, 0]

Me:
Are the numbers and 'None' only included in the list?

Dear hideto.T:
Numeric and string only.

Then you don't need to use isinstance() and you can do the following:

 counts = [sum(v!='None' for vina) for a two_array_list ]

2022-09-30 22:00

You can do it by applying this article and list inclusion.
count how many of an object type there are in a list Python

a=[1,1.23, 'abc', 'ABC', 6.45, 2, 3, 4, 4.98]

sum(isinstance(i,int)for i in a)

I think it will look like this.

two_array_list=[0,0,0, 'None', [1,1, 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None']
result = [sum(isinstance(i, int) for i in a) for a two_array_list ]
print(result)

In addition, if int is included as well as float, this article (the first answer, not the resolution mark in ) should be applied.
How to accept the input of both int and float types?

if isinstance(num, (int, float)):
    #dostuff

It will look like this.

two_array_list=[0,0,0, 'None', [1,2.5, 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None', 'None']
result = [sum(isinstance(i, (int, float)) for i in a) for a two_array_list ]
print(result)

2022-09-30 22:00

If you have any answers or tips

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