how do I concatenate the name:value pairs of request headers with the tab (\t) separator such that name field is all in lower case

Below are the points to be considered.

1. Get the first header value for the name.

2. Trim the leading and trailing white spaces.

   MEDevel.com: Open-source for Healthcare and Education

   Collecting and validating open-source software for healthcare, education, enterprise, development, medical imaging, medical records, and digital pathology.

   Visit Medevel

3. Replace all repeated white spaces with a single space.

4. Concatenate the name, value pairs with the tab (\t)separator(name field is all in lower case).

5. Terminate the headers with another tab (\t) separator.

   import re

   headers ={
   "Accept" : "application/vnd.accept_header-status.v11+json",
   "Content-Type" : "application/vnd.content-type_header.v11+json"
   }

   canonicalize_headers=’\t’.join(h for h in headers)

   print(canonicalize_headers)

Sample input:

Host: akaa-xxxxxxxxxxxxxxxx-xxxxxxxxxxxxxxxx.aa-dev.net.net
 x-a: va
 x-c: "      xc        "
 x-b:    w         b

Sample Output:

POST\thttp\takaa-xxxxxxxxxxxxxxxx-xxxxxxxxxxxxxxxx.aa-dev.net\t
 /sample-api/v1/property/?fields=x&format=json&cpcode=1234\tx-a:va\tx-b:w b\tx-c:" xc "\t\t\t

need to create a post request with signing headers, link for documentation:
https://developer.akamai.com/legacy/introduction/Client_Auth.html

>Solution :

From what I have understood, what you are looking for is:

def clean(headers):
    for k, v in headers.items:
        k = re.sub(r"\s+", " ", k.strip())
        yield f"{k.lower()}\t{v}"


canonicalize_headers = "\t".join(clean(headers))