You want to call Python scripts in FineDataLink, as many of your data processing tasks are implemented through Python scripts.
FineDataLink provides a Python Script node for you to call Python scripts, as shown in the following figure.
1. The single quotation mark (') is forbidden in the script path and the parameter value if the Python script is stored on a Linux or a macOS system.
2. The double quotation mark (") is forbidden in the script path and the parameter value if the Python script is stored on a Windows system.
Call Python scripts via an SSH data connection.
Write Python code in the Python operator after configuring the Python environment.
The Python script holds the grade information.
Provide the student's name (with the argument being John in this example) as an input parameter for the Python script to fetch the student's grade. The fetched data is output to an automatically created file named test.txt, located in the Python script's path.
You can use the example data. Python Script.zip Student Name.xls
Before using the Python Script node to run a Python script, you need to configure the SSH data connection to connect to the remote target server, as shown in the following figure.
1. Fetch the student's name.
2. Output the fetched data as an argument.
Set the parameter name to w, as this is the parameter received by the example Python script. Fetch data from all rows in the first column. The default value is only for previewing at downstream nodes and won't be used during actual execution. You can copy the value from Parameter Preview on the right.
Drag in the Python Script node, set the Python script to be run, and add the script parameter set in the section "Fetching the Student's Name and Output It as a Parameter," as shown in the following figure.
The following table describes each setting item.
Enter the complete path of the Python script to be executed on the target server of the SSH connection, where:
The script file should have the .py extension.
Referencing parameters is supported.
The script path must be secure against shell injection.
1. Define the parameter to be passed to the script, where:
You can select existing parameters only. Parameters with the same name are not supported.
The script parameter must be secure against shell injection.
Unconfigured script parameters are not allowed.
Parameters are passed to the script in a top-to-bottom order.
2. From version 4.1.0 onwards, the drop-down list displays the configured parameters, which are divided into task parameters and global parameters:
Parameters with identical names are also included, among which the effective ones are arranged by priority from high to low as follows: parameters set in Parameter Assignment nodes, parameters of the task containing the invocation task, custom parameters, global parameters, and built-in parameters.
Unavailable parameters are shown in gray.
Set the maximum execution time for the command. It is set to Unlimited by default.
The command will be terminated if execution exceeds X second(s), with X ranging from 0 to 1,000,000.
Specify the output character encoding, which defaults to UTF-8.
Options in the drop-down list include:
UTF-8
GBK
BIG5
ISO-8859-1
1. Click Run to execute the task. The running result in Log upon successful execution is shown in the following figure.
2. Check the content of the test.txt file automatically created in the directory of the Python script, which is shown in the following figure.
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