如何判断函数输出是否存在于列表中并分至不同列表存储？

Got it, let's tweak your code to fit the new logic you described. First, I renamed the sum variable to sum_val—since sum is a built-in Python function, using it as a variable name can cause unexpected issues later on. I also added a second empty list (I called it myOtherList, feel free to rename it to something more descriptive for your use case) and wrapped the check-and-add logic into a helper function to keep things clean.

Here's the updated code:

myUniqueList = []
myOtherList = []  # New empty list for values not present in myUniqueList

def add_Item_To_List(item):
    sum_val = item + 36
    return sum_val

def add_to_correct_list(value):
    # Check if the value exists in myUniqueList
    if value in myUniqueList:
        myUniqueList.append(value)
    else:
        myOtherList.append(value)

# Test the functions with your original variables
var = 37
var2 = add_Item_To_List(var)
add_to_correct_list(var2)

var3 = add_Item_To_List(var2)
add_to_correct_list(var3)

var4 = add_Item_To_List(var3)
add_to_correct_list(var4)

# Print both lists to verify the result
print("myUniqueList:", myUniqueList)
print("myOtherList:", myOtherList)

How It Works: #

• We start with two empty lists: myUniqueList (your original list) and myOtherList for values that aren't in myUniqueList.
• The add_Item_To_List function stays mostly the same, just with the safer variable name.
• The new add_to_correct_list function handles the core logic: it checks if the calculated value is already in myUniqueList. If it is, we add it to myUniqueList; if not, we send it to myOtherList.
• We use this helper function each time we get a value from add_Item_To_List to avoid repeating the check logic over and over.

Example Output: #

When you run this code, since none of the calculated values (73, 109, 145) are in the initially empty myUniqueList, all of them will end up in myOtherList:

myUniqueList: []
myOtherList: [73, 109, 145]

If you want to test the "exists" case, you could add something like this before calculating var2:

myUniqueList.append(73)

Then var2 (which is 73) will be added to myUniqueList instead of myOtherList.

内容的提问来源于stack exchange，提问作者cams