如何用另一个文件中的文本替换一个文件中的文本？

Question

I am trying to put text from a file in another file that also contains text. Example:

FILE 1 contains:

@WORLD

FILE 2 contains:

HELLO:LEARNING

I would like to insert the content of FILE1 into FILE2 to get:

HELLO@WORLD:LEARNING

More or less I have the code:

fname = input("Put your file: ")

if fname == "combos.txt":
    try:
        f = open(fname) #OPEN THE FILE "COMBOS.TXT"
        delimiter = ":"
        with open("combos.txt", "r", encoding='UTF-8')as f: #WITH THE FILE "COMBOS.TXT" OPENED AS VARIABLE F
            data = [f"{x}{delimiter}{y}" for x,y in [tuple(i.strip().split(delimiter)) for i in f.readlines()]] #

            with open("lowercase - combos.txt", "w+", encoding='UTF-8')as f:
                f.write("\n".join(data))
                
            input("Your file was edited successfully! Press enter to continue...")
        
        if platform.system() == "Windows":
            p = subprocess.call(["python", "start.py"])
    except:
        print("--Something went wrong while trying to load your file--")

The problem is in this part:

data = [f"{x}{delimiter}{y}" for x,y in [tuple(i.strip().split(delimiter)) for i in f.readlines()]] #

x and y are the text from FILE 2: HELLO (X): LEARNING (Y)

And I would like to add the text from FILE 1 --> @WORLD to FILE 2 in (X):

HELLO@WORLD (X): LEARNING (Y)

I don´t know how to fix it, I suppose that is editing variable X . I made different test (creating a variable to open the other file, or putting write() function. Not worked me, I don´t know if more or less is something like that but I couldn´t do it):

data = [f"{x}{delimiter}{y}"

Answer 1

IIUC, you want to create the new data to be in the format of:

{X from FILE2}{FILE 1}:{Y from FILE2}

Currently in your code I see that you only loop on a single file. You should loop on both files simultanasouly, using the zip function. Then simply construct your data:

with open(FILE1) as file1, open(FILE2) as file2:
    data = []
    for line1, line2 in zip(file1, file2):
        x, y = line2.split(':')
        data.append(f"{x}{line1.strip()}:{y}")

with open(FILE2, 'w') as file2:
    file2.writelines(data)

Note that you usually don't need to use readlines()/read() and create unnecessary lists/strings in memory for most file operations. You can just loop in-place directy on the lines of the file ( for line in file ) as files are iterators in Python.

Answer 2

Unsure of what you are wanting as the process of this program. I did come up with a result on my end matching your expectations. Validation is not provided, that is up to you.

# file1.txt = @WORLD
# file2.txt = HELLO:LEARNING
# file2.txt after run = HELLO@WORLD:LEARNING

def insert_file_in_file(f1_path, f2_path, placed_before = " "):
    with open(f1_path, "r") as f1:
        f1_text = f1.read()
    with open(f2_path, "r") as f2:
        f2_text = f2.read()

    with open(f2_path, "w") as f2:
        string_list = f2_text.split(placed_before)
        f2.write((f1_text + placed_before).join(string_list))

insert_file_in_file("file1.txt", "file2.txt", ":")