Python从.txt文件替换多个字符串

Question

I would like to use the .replace function to replace multiple strings with in a .txt file, to run my servos. My .txt looks like this: A5,0,500,1,400.

 data_dict = {} 

for line in data:

    line = line.replace("\n","","","")

    line_list = line.split(",")

    Object = line_list[0]
    num_one = line_list[1]
    num_two = line_list[2]
    num_three = line_list[3]
    num_four = line_list[4]


    data_dict[object] = [num_one, num_two, num_three, num_four]
    pass

return data_dict

The problem is here: line = line.replace("\\n","","","")

This is the error: TypeError: replace() takes at most 3 arguments (4 given)

It works with line = line.replace("\\n","") but that is just one servo, I need to run two.

Thank you

Answer 1

When you access replace as an instance method, you must only use 3 arguments. The first argument (the string) is implicit. This is why you see the error.

Further, you can use len(line) as a cheap way to replace all occurrences without knowing how many there are -- there can only be at most the number of characters in the string.

line.replace("\n", "", len(line))