在Python中使用循环和数组来改变条件 [英] Change conditions using loop and array in python
问题描述
我在python中有旧的脚本,在哪里
pre $如果__name__ =='__main__':< BR>
我们调用函数的参数。如果它的参数等于一些字符串,我们应该调用函数。
旧代码。
if sys.argv [1] =='add':
sys.exit(add(db,usr ))
if sys.argv [1] =='rem':
sys.exit(rem(db,usr))
if sys.argv [1] =='rmusr' :
sys.exit(rmusr(db,usr))
第一次,我想过切换案例,但我怎么知道,蟒蛇没有它。我试图循环和数组。
我可以使用它吗?对不起,我开始学习Python,2小时前。但是,这是非常有趣的,我希望你能帮助我。
actions = ['add','rem' ,'rmusr']
for a actions:
if sys.argv [1] =='a':
sys.exit(a(db,usr))
是否正确?我怎么知道,我们不应该用$来调用变量。请帮忙。
您可以将函数添加到字典中,然后使用用户输入字符串来检索函数:
$ $ $ $ $ $ $ $ $'$'$'$'$''$'$' :rmusr,
}
action = sys.argv [1]
如果在动作中执行动作:
sys.exit(actions [action]( db,usr))
i have and old script in python, where in
if __name__ == '__main__': <br>
We call arguments of functions. And if it argument equals some string we should call function. Old code.
if sys.argv[1] == 'add':
sys.exit(add(db, usr))
if sys.argv[1] == 'rem':
sys.exit(rem(db, usr))
if sys.argv[1] == 'rmusr':
sys.exit(rmusr(db, usr))
At the first time, i thought about "switch case", but how i find out, python does not have it. And i tried to loop and array. Can i use it on this ? Sorry, i started learn python, 2 hours ago. But it is very interesting, and i hope, that you can help me.
actions = ['add','rem','rmusr']
for a in actions:
if sys.argv[1] == 'a':
sys.exit(a(db, usr))
Is it correct ? How i find out, we should not call variables with "$". Please help.
You can add the functions to the dictionary and then use the user-input string to retrieve the function:
actions = {
'add': add,
'rem': rem,
'rmusr': rmusr,
}
action = sys.argv[1]
if action in actions:
sys.exit(actions[action](db, usr))
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