CODEWITHSUNDEEP
pythonpython-3.xdictionary
Gokturk
Gokturk

Reputation: 47

Creating one line string with Dictionary Keys in Python3

I need to create one line string with dictionary's keys in Python3. I can print them in one line with end='' function but i can't update like that.

I have a dictionary like below.

array = {
'MERCHANT': "TEST",
'ORDER_REF':  "Test123",
'BACK_REF': "http://2ac99X37.ngrok.io/",
'ORDER_PNAME[0]': "BLA",
'ORDER_PCODE[0]': "BLA",
'ORDER_PINFO[0]': "BLA",
'ORDER_PRICE[0]': "1",
'ORDER_VAT[0]': "18",

}

And i'm sorting them to their keys and getting length 

for k, v in sorted(array.items()):
hashstring =str(len(v)) + str(v)

But when i print the hashstring at this step, they printing like below

25http://2ac99X37.ngrok.io/
4TEST
3BLA
3BLA
3BLA
11
7Test123
218

I need to update them like below because true hash calculation

25http://2ac99X37.ngrok.io/ 4TEST 3BLA 3BLA 3BLA 11 7Test123 218

Like i was mentioned above; I can print them in one line with end='' function but this is not effecting the "hashstring" parameters value.

My hash calculation code is like below.

signature = hmac.new(secret.encode('utf-8'), hashstring.encode('utf-8'), hashlib.md5).hexdigest()

Could you please assist me ?

Best,

Upvotes: 0

Views: 920

Answers (3)

Mohd
Mohd

Reputation: 5613

You need to initialize hashstring before your loop, then keep concatenating to it in your loop, as the following:

hashstring = ''
for k, v in sorted(array.items()):
    hashstring += '{}{} '.format(len(v), v)
hashstring = hashstring[:-1]  # to remove the trailing space

Output:

25http://2ac99X37.ngrok.io/ 4TEST 3BLA 3BLA 3BLA 11 7Test123 218

or you can use list comprehension instead of the loop to do it in one line as the following:

hashstring = ' '.join(['{}{}'.format(len(v), v) for k, v in sorted(array.items())])

Upvotes: 1

bphi
bphi

Reputation: 3195

Your code isn't properly formatted.

I think the issue is in your for loop.

If you write hashstring =str(len(v)) + str(v) it will represent a different value every time you print it.

Try

hashstring=''
for k, v in sorted(array.items()):
    hashstring += str(len(v)) + str(v)
print(hashstring)

Upvotes: 0

juanpa.arrivillaga
juanpa.arrivillaga

Reputation: 96171

Whenever you want to want to combine many individual strings into one string with a separator, you want to use .join. So, accumulate your parts into a list, then .join them:

In [6]: hashparts = []

In [7]: for k, v in sorted(array.items()):
   ...:     hashparts.append(str(len(v)) + str(v))
   ...:

In [8]: hashstring = ' '.join(hashparts)

In [9]: print(hashstring)
25http://2ac99X37.ngrok.io/ 4TEST 3BLA 3BLA 3BLA 11 7Test123 218

Upvotes: 0

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