How to pass command line arguments to dependent tasks

[bingozhu0197]

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Assume I have a foo task depends upon the bar task. I want to pass the argument verbose to the bar. How could I achieve that?
I read the article https://stackoverflow.com/questions/34957460/python-doit-use-arguments-in-dependent-tasks, but I still need to get how to save the argument.

def show_args(verbose=0):
print(f'{verbose}')

def save_arg(verbose):
return {'verbose': verbose}

def task_bar():
return {'actions': [show_args],
# 'getargs': {'verbose':('foo', 'verbose')}, #it will introduce cyclic dependencies**
'verbosity': 2,
}

def task_foo():
return {'actions': [save_arg],
'verbosity': 2,
'params': [
{
'name': 'verbose',
'long': 'verbose',
'short': 'v',
'type': bool,
'default': False,
},],
'task_dep':['bar'],
}