I have a function within which I have a for loop that is looking for a certain string, which if true executes a different function. What I can't work out is how to create a variable within which to store the outcome of the for loop. I want to take the outcome (i.e. this function was executed or this string was present) and pass that into another function but I cannot get the variable to remember the outcome. Any help would be greatly greatly appreciated. Thank you

for something in something:
    def a_func():
        
        if this  == 'A':
            func_1()
        if this  == 'B':
            func_2()    
        if this  == 'C':
            func_3()  
        if this  == 'D':
            func_4() 

        return this

    this = a_func()

CodePudding user response：

What you want to do and what you have done do not seem to align well. Currently, your code is poorly written. However, it can be fixed as follows:

def func_1():
    return 1
    
def func_2():
    return 2
    
def func_3():
    return 3
    
def func_4():
    return 4
    
action_for_value = {
    'A': func_1,
    'B': func_2,
    'C': func_3,
    'D': func_4,
}
    
for something in ['A', 'B', 'C', 'D', 'E']:
    print(action_for_value[something]() if something in action_for_value else "Not found!!")

This example stores functions corresponding to values in a dictionary and then basis if the value is present, makes a function call.

Here it is in action.

Some notes about your current code:

1. Declaring a function inside a for loop is never correct, and has quite a few consequences. Move it outside the for block, and then call the function inside the for block.
2. You want to assign the value of the func_x to a variable which is either global or at least outside the for loop. Alternatively, you can return from a_func the value from func_x as if this == 'A': return func_1() and then use the return value to assign this.

From the looks of it, I would ask you to review your understanding of the basics of Python. A lot of it seems cobbled together without a good understanding of what is happening.

CodePudding user response：

I'm not sure what you're actually trying to do, but defining a function inside of a for loop is definitely not the way to do so.

def func_1():
    pass

def func_2():
    pass

def func_3():
    pass

def func_4():
    pass

def a_func(this):
    if this  == 'A':
        func_1()
        return f'{this} found and func_1() ran.'
    elif this  == 'B':
        func_2()    
        return f'{this} found and func_2() ran.'
    elif this  == 'C':
        func_3()  
        return f'{this} found and func_3() ran.'
    elif this  == 'D':
        func_4() 
        return f'{this} found and func_4() ran.'
    else:
        pass
        

something = ['A', 'B', 'C', 'D']

outputs = [a_func(x) for x in something]

for value in outputs:
    print(value)

Output:

A found and func_1() ran.
B found and func_2() ran.
C found and func_3() ran.
D found and func_4() ran.