How to take the first two letters of a variable in python?

Question

I have a dataset like below:

data
id    message
 1    ffjffjf
 2    ddjbgg
 3    vvnvvv
 4    eevvff
 5    ggvfgg

Expected output:

data
id    message  splitmessage
 1    ffjffjf    ff
 2    ddjbgg     dd
 3    vvnvvv     vv
 4    eevvff     ee
 5    ggvfgg     gg

I am very new to Python. So how can I take 1st two letters from each row in splitmessage variable.

my data exactly looks like below image
need to split that
so from the image i want only hour and min's which are 12 to 16 elements in each row of vfreceiveddate variable.

Show your current code. Also, you do want to do your basic research based on the terms "python substring" — reto, Mar 30 '15 at 06:20

score 1 · Answer 1 · answered Mar 30 '15 at 07:23

1

dataset = [
    { "id": 1, "message": "ffjffjf" },
    { "id": 2, "message": "ddjbgg" },
    { "id": 3, "message": "vvnvvv" },
    { "id": 4, "message": "eevvff" },
    { "id": 5, "message": "ggvfgg" }
]

for d in dataset:
    d["splitmessage"] = d["message"][:2]

answered Mar 30 '15 at 07:23

Ihor Pomaranskyy

5,437
34
37

my data type is pandas.core.series.series so how can i do that at that point – surendra Mar 30 '15 at 08:14
I asked exactly for output of ```print``` command, which will help me to determine what data structure is used to represent the date you have to deal with. – Ihor Pomaranskyy Mar 30 '15 at 08:36
By the way, if you have to extract some parts of date/time representation, it's probable not the best idea to manipulate strings. You can work with ```datetime``` objects. – Ihor Pomaranskyy Mar 30 '15 at 08:38

score 0 · Accepted Answer · edited May 23 '17 at 11:43

0

What you want is a substring.

mystr = str(id1)
splitmessage = mystr[:2]

Method we are using is called slicing in python, works for more than strings.

In next example 'message' and 'splitmessage' are lists.

message = ['ffjffjf', 'ddjbgg']
splitmessage = []
for myString in message:
    splitmessage.append(myString[:2])
print splitmessage

edited May 23 '17 at 11:43

Community

1
1

answered Mar 30 '15 at 06:28

Laraconda

667
6
15

in mystr = str(id1) what do you mean by id1 – surendra Mar 30 '15 at 06:37
I mean the message at id 1. – Laraconda Mar 30 '15 at 06:43
it is working only for the 1st one, mystr = str(data['message']) splitmessage = mystr[:2] but how can i do that for whole variable – surendra Mar 30 '15 at 07:20
```myString``` as the name for variable violates PEP-0008! – Ihor Pomaranskyy Mar 30 '15 at 07:25
Iterating the whole dataset and appending the new string to splitmessage. – Laraconda Mar 30 '15 at 07:28
Thanks for the observation, @Igor – Laraconda Mar 30 '15 at 07:29

score 0 · Answer 3 · answered Mar 30 '15 at 06:49

0

If you want to do it for the entire table, I would do it like this:

dataset = [id1, id2, id3 ... ]
for id in dataset:
   splitid = id[:2]

answered Mar 30 '15 at 06:49

Seraphim

181
8

How to take the first two letters of a variable in python?

3 Answers3