Python regex — extraneous matchings

Question

I want to split a string using -, +=, ==, =, +, and white-space as delimiters. I want to keep the delimiter

Answer 1

Try this:

def tokenize(s):
  import re
  pattern = re.compile("(\-|\+\=|\=\=|\=|\+)|\s+")
  x = pattern.split(s)
  result = []
  for item in x:
    if item != '' and item != None:
      result.append(item)
  return result

print(tokenize("hello-+==== =+  there"))