import sys                       
import time                      
                                 
#import kafka                    
                                 
print('stdout1')                 
print('stderr1', file=sys.stderr)
                                 
print('stdout2')                 
print('stderr2', file=sys.stderr)
                                 
sys.stdout.flush()               
sys.stderr.flush()               
                                 
print('stdout3')                 
print('stderr3', file=sys.stderr)
                                 
print('stdout4')                 
print('stderr4', file=sys.stderr)
                                 
time.sleep(10000)                





output:

swh-indexer-journal-client_1             | stderr1
swh-indexer-journal-client_1             | stderr2
swh-indexer-journal-client_1             | stdout1
swh-indexer-journal-client_1             | stdout2