How to get the value of the build parameter ?

[Asa6]

jenkins api:
http://xxxxxx/job/test/descriptorByName/net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition/fillValueItems?param=

result:
{"_class":"net.uaznia.lukanus.hudson.plugins.gitparameter.model.ItemsErrorModel","errors":[],"values":[{"name":"4b91af67 2020-10-25 18:11 xxxxx xxxxxxx@xxxx.com 1. xxxxxxxxxxxxxxxxxxxx","value":"4b91af1111115df6212f1fdsfdsaf4223826f43434"}]}

[Asa6]

job = jk.get_job('test')
for action in job.api_json()['actions']:
for parameter in action['parameterDefinitions']:
print(parameter)

result:
{'_class': 'hudson.model.ParametersDefinitionProperty', 'parameterDefinitions': [{'_class': 'net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterDefinition', 'defaultParameterValue': {'_class': 'net.uaznia.lukanus.hudson.plugins.gitparameter.GitParameterValue', 'value': '${commit}'}, 'description': None, 'name': '', 'type': 'PT_REVISION'}]}

the result is a variable（'value': '${commit}'）？

[joelee2012]

to get parameters of build with following code

 paramters = build.get_parameters()

[Asa6]

I want to get the optional value of the build parameter before the build, not after the build

similar to this:

display a list of optional values ​​for build parameters

[joelee2012]

try following code

params = []
for p in job.api_json()['property']:
    if 'parameterDefinitions' in p:
        params = p['parameterDefinitions']

but for your case, the "${commit}" is variable which will be evaluated during building, so you can't get an exact value for job.

[Asa6]

Run the above code, the result is still "${commit}". Is there another way?

[joelee2012]

No, because the "${commit}" is bundled with build not the job

[Asa6]

OK, thanks for your answer

[Asa6]

Sorry, it was caused by my jenkins configuration error. Using job.api_json can get the value correctly

、
params = []
for p in job.api_json()['property']:
if 'parameterDefinitions' in p:
params = p['parameterDefinitions']
、

Return：
{'name': 'gitchange', 'value': '747d8ddfds2323fdsafdasf239575473bd43254'}