如何使用 Python 中的 function 在两个列表之间进行过滤？

Question

I am attempting to get Python to filter values between two lists. It is pasting the values of the original list and ignoring the instructions. Thanks in advance for your input.

string_val = ['Tom','Kyle','Carl','Tom','Mike','Austin']
delval = ['Tom','Kyle']


def filter_list(string_val, delval):
    new_string =[]
    for v in string_val:
        if (string_val) != (delval):
            new_string.append(v)
    return new_string

result = filter_list(string_val, delval)
print(result)

Answer 1

You're comparing wrong value, you should compare each value instead of entire delval.

def filter_list(string_val, delval):
    new_string =[]
    for v in string_val:
        found = False
        if v not in delval:
            new_string.append(v)
    return new_string

result = filter_list(string_val, delval)
print(result)

Answer 2

First of all you are iterating through string_val which has names. You want to check if each name is in delval . Do this using in I think your looking for something like this (list comprehension)

string_val = ['Tom','Kyle','Carl','Tom','Mike','Austin']
delval = ['Tom','Kyle']
def filterList(string_val,delval):
    return [names for names in string_val if names not in delval]
print(filterList(string_val,delval))

output

['Carl', 'Mike', 'Austin']

Answer 3

Here's the Python one-liner code to find the disjoint elements.

def filter_list(string_val, delval):
    return list(set(string_val) - set(delval))

Output

['Austin', 'Mike', 'Carl']