Less complicated concatenation in Python

Question

I have multiple str-variables and I want to concatenate them to single line but with separator:

var_a + 'SEPARATOR' + var_b + 'SEPARATOR' + var_c + 'SEPARATOR' + var_d

As you can see, it looks disgusting and unefficient.

So, is there any way to make it simpler by adding separator automatically between separate strings?

P.S. I like the way it works in print function:

print(var_a, var_b, var_c, var_d, sep="SEPARATOR")

Answer 1

Use join() function:

    words = [var_a,var_b,var_c,var_d]
    my_separator = "this is a separator"
    my_expected_sentence= my_separator.join(words)

Update: Also you can use your custom method:

def my_join(args, sep):
  sentence=""
  for i in args:
      sentence+=i+sep
  return sentence

words=["abc","def","ghi"]
data = my_join(words,'hello')
print(data)

In this way you can add separator before every words.Like:

def my_preceding_join(args, sep):
      sentence=""
      for i in args:
          sentence+=sep+i
      return sentence

    data = my_preceding_join(words,'hello')
    print(data)