如何在 Python 中将数组声明为 function 参数？

Question

I have declared an empty list. I want to store in that one some strings from a text file. If I am doing without creating TXT_to_PList it is working smoothly. But using TXT_to_PList length of deTrimis array will be 0 . Why?

deTrimis = []

def TXT_to_PList(fileName,array):
    with open(fileName) as f:
        array = f.read().splitlines()
TXT_to_PList('strings.txt',deTrimis)
print (len(deTrimis))

Answer 1

You don't need that empty list at all:

def TXT_to_PList(fileName):
    with open(fileName) as f:
        return f.read().splitlines()

deTrimis = TXT_to_PList('strings.txt')

Answer 2

You can't modify function argument by assignment, change it to:

array.extend(f.read().splitlines())

see more info here: Why can a function modify some arguments as perceived by the caller, but not others?