In [1]:

    

!echo a > a.txt
!echo b > b.txt
!echo c > c.txt
!echo d > d.txt


    

In [2]:

    

%preview result.txt

input: 'a.txt', 'b.txt', 'c.txt', 'd.txt', group_by=1
output: 'result.txt'
sh: expand=True
  cat {_input} > {_output}

print(f'output = {_output}, step output = {step_output}')


    

    




output = result.txt, step output = result.txt
output = result.txt, step output = result.txt
output = result.txt, step output = result.txt
output = result.txt, step output = result.txt

In [3]:

    

input: 'a.txt', 'b.txt', 'c.txt', 'd.txt', group_by=1
output: f'{_input:n}.bak'

sh: expand=True
  cat {_input} > {_output}

print(f'output = {_output}, step output = {step_output}')


    

    




INFO: scratch_0 (index=0) is ignored due to saved signature
INFO: scratch_0 (index=1) is ignored due to saved signature
INFO: scratch_0 (index=2) is ignored due to saved signature
INFO: scratch_0 (index=3) is ignored due to saved signature

In [4]:

    

%run
[10]
input: 'a.txt', 'b.txt', 'c.txt', 'd.txt', group_by=1
output: f'{_input:n}.bak'

stop_if(_index==2, 'Skip group 3')

sh: expand=True
  cat {_input} > {_output}

print(f'output = {_output}, step output = {step_output}')

[20]
print('Step input: (output of previous step)')
print(step_input)


    

    




INFO: default_10 (index=0) is ignored due to saved signature
INFO: default_10 (index=1) is ignored due to saved signature
INFO: Skip group 3
INFO: default_10 (index=3) is ignored due to saved signature






    




Step input: (output of previous step)
a.bak b.bak d.bak

In [ ]: