How do I access YAML key, value in Python

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Python

YAML

I want to make TS1 to sleep for 10secs and TS2 to sleep for 20secs.
Pls help me.

What I have tried:

In YAML:
stepsleep:

sleeptimeflag: True

TS: [1,2]

sleeptimeTS: [10,20]

In Python:
In TS1: #this should sleep 10secs
if (self.stepsleep['sleeptimeflag']):

if (self.test_step_count in self.stepsleep['TS']):

for key, value in self.stepsleep.iteritems():
time.sleep(self.stepsleep[sleeptimeTS])