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You can use Python to write functions in a custom container of Function Compute. This topic describes how to deploy and invoke a Python 3.9 function. You can also modify the Python sample code as needed for custom development.

Prerequisites

Procedure

Run the following command in the specified directory to initialize a project:
```
s init start-fc-custom-container-event-python3.9 -d start-cc-py39
```
Note -d specifies the name of the folder in which the sample project resides. You can customize the folder name as required.
Run the following command to go to the project directory:
```
cd start-cc-py39
```
Optional: Modify the sample code as needed for custom development.
Modify the s.yaml file.
Change the value of the image field in the s.yaml file to your image name.

Run the following command to deploy the project:

s deploy -y

Sample command output:

[2022-02-09 06:46:07] [INFO] [S-CLI] - Start the pre-action
......
helloworld:
  region:   cn-hangzhou
  service:
    name: hello-world-service
  function:
    name:       py39-event-function
    runtime:    custom-container
    handler:    not-used
    memorySize: 256
    timeout:    60

Run the following command to remotely invoke the function:

s invoke -e "hello world"

Sample command output:

========= FC invoke Logs begin =========
FC Invoke Start RequestId: 8bb53c93-09f9-4a3d-a61f-3a2f2e0030e0
hello world
FC Invoke End RequestId: 8bb53c93-09f9-4a3d-a61f-3a2f2e0030e0

Duration: 2.46 ms, Billed Duration: 3 ms, Memory Size: 256 MB, Max Memory Used: 18.18 MB
========= FC invoke Logs end =========

FC Invoke Result:
Hello from FC event function, your input: hello world, request_id: 8bb53c93-09f9-4a3d-a61f-3a2f2e0030e0

End of method: invoke