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How to count "xxx": ["23", "1", "9"] and "xxx": ["2"], then the total should be 4.

How to count "xxx": ["23", "1", "9"] and "xxx": ["2"], then the total should be 4.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Python:

Data =

[
{
"creatt": "2022-02-28T13:05:24"
},
{
"creat": "2022-02-21T23:49:33"
},
{
"creat": "2022-02-21T11:08:23"
},
{
"creat": "2022-02-19T10:06:46",
"xxx": [
"23",
"1",
"9"
]
},
{
"creat": "2022-01-25T13:12:49",
"xxx": [
"2"
]
}
]
 
How to count "xxx": ["23", "1", "9"] and "xxx": ["2"], then the total should be 4.
 
I would like to return the 4.
 
my desired code:
{
  "total": 4
}
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