Sorting a list based on upper and lower case

Question

I have a list:

List1 = ['name','is','JOHN','My']

I want to append the pronoun as the first item in a new list and append the names at last. Other items should be in the middle and their positions can change.

So far I have written:

my_list = ['name','is','JOHN','My']

new_list = []

for i in my_list:
  if i.isupper():
    my_list.remove(i)
  new_list.append(i)
print(new_list)

Here, I can't check if an item is completely upper case or only its first letter is upper case.

Output I get:

['name','is','JOHN','My']

Output I want:

['My','name','is','JOHN']

or:

['My','is','name','JOHN']

EDIT: I have seen this post and it doesn’t have answers to my question.

`[t[1] for t in sorted((0 if s.istitle() else 2 if s.isupper() else 1, s) for s in List1)]` (and no I am not going to post it as an answer because it is not maintainable code even though it works...) — alani, Sep 08 '20 at 20:26

Barmar · Accepted Answer · 2020-09-08T20:45:38.827

3

i.isupper() will tell you if it's all uppercase.

To test if just the first character is uppercase and the rest lowercase, you can use i.istitle()

To make your final result, you can append to different lists based on the conditions.

all_cap = []
init_cap = []
non_cap = []

for i in my_list:
    if i.isupper():
        all_cap.append(i)
    elif i.istitle():
        init_cap.append(i)
    else: 
        non_cap.append(i)

new_list = init_cap + non_cap + all_cap
print(new_list)

DEMO

edited Sep 08 '20 at 20:45

answered Sep 08 '20 at 20:27

Barmar

741,623
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612

2

`istitle` method? – alani Sep 08 '20 at 20:28
That's even better – Barmar Sep 08 '20 at 20:31
@Barmar I am getting this as the output: `['John', 'My', 'name', 'is']` – null_override Sep 08 '20 at 20:43
1

I just ran it and get `['My', 'name', 'is', 'JOHN']` – Barmar Sep 08 '20 at 20:47
You'll get that output if the input contains `John` instead of `JOHN`. – Barmar Sep 08 '20 at 20:49
@Barmar Thanks. I got it. I mistakenly typed John. – null_override Sep 08 '20 at 20:53

Porkfu · Answer 2 · 2020-09-08T21:21:34.483

1

How about this:

s = ['name', 'is', 'JOHN', 'My']

pronoun = ''
name = ''
for i in s:
    if i.isupper():
        name = i
    if i.istitle():
        pronoun = i

result = [pronoun, s[0], s[1], name]

print(result)

edited Sep 08 '20 at 21:21

answered Sep 08 '20 at 20:26

Porkfu

71
5

I think you should write this as a comment – null_override Sep 08 '20 at 20:47
i can't leave comments :( – Porkfu Sep 08 '20 at 20:55
But you did comment above! – null_override Sep 08 '20 at 20:56
sorry, you are right. specifically, i cannot comment on other people's answers. i've edited my response with actual code. – Porkfu Sep 08 '20 at 21:10

Kirby Abogaa · Answer 3 · 2020-09-08T20:48:09.170

0

Don't @ me pls XD. Try this.

my_list = ['name','is','JOHN','My']
            
new_list = ['']

for i in range(len(my_list)):
  if my_list[i][0].isupper() and my_list[i][1].islower():
    new_list[0] = my_list[i]
  elif my_list[i].islower():
    new_list.append(my_list[i])
  elif my_list[i].isupper():
      new_list.append(my_list[i])
    
print(new_list)

edited Sep 08 '20 at 20:48

answered Sep 08 '20 at 20:46

Kirby Abogaa

51
2

You do the same thing in the `islower()` and `isupper()` cases. That won't reorder them. – Barmar Sep 08 '20 at 20:47
Did you try running it? XD ... just taking advantage of how code is read and implemented based on sequence...but then again, who am I to say...i'm still new to programming XD – Kirby Abogaa Sep 08 '20 at 20:49
1

Change the order of the input to `['JOHN','name','is','My']` and the result is `['My', 'JOHN', 'name', 'is']` – Barmar Sep 08 '20 at 20:53
All your code does is put the word with initial capital first, everything else is kept in the original order. – Barmar Sep 08 '20 at 20:53
You don't put the all-uppercase word last. – Barmar Sep 08 '20 at 20:53
but .append() DOES put the value in the last slot...doesn't it? which is why all upper-case word is in the last line of the code...it does re-order the sequence based on the problem presented – Kirby Abogaa Sep 08 '20 at 20:58
You're putting both `islower()` and `isupper()` in the last slot. – Barmar Sep 08 '20 at 21:06
1

You're not processing all the `islower()` first, you're processing them in the order that they appear in the input list. – Barmar Sep 08 '20 at 21:06
Try it with the altered input and you'll see. – Barmar Sep 08 '20 at 21:07

Sorting a list based on upper and lower case

3 Answers3