How to change a string into uppercase

Question

I have problem in changing a string into uppercase with Python. In my research, I got string.ascii_uppercase but it doesn't work.

The following code:

 >>s = 'sdsd'
 >>s.ascii_uppercase

Gives this error message:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'str' object has no attribute 'ascii_uppercase'

My question is: how can I convert a string into uppercase in Python?

Easy tutorial on doing this: http://www.dreamsyssoft.com/python-scripting-tutorial/strings-tutorial.php — Rocky Pulley, Jan 15 '13 at 18:05
Related: [How to convert string to lowercase in Python?](http://stackoverflow.com/q/6797984/95735) :) — Piotr Dobrogost, May 05 '13 at 14:09

score 1314 · Accepted Answer · edited Feb 28 '22 at 10:26

1314

Use str.upper():

>>> s = 'sdsd'
>>> s.upper()
'SDSD'

See String Methods.

edited Feb 28 '22 at 10:26

Tomerikoo

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answered Feb 13 '12 at 07:51

Dan D.

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162

Also worth mentioning `title()`, `'abc def'.title()` will give you `Abc Def` – Burhan Khalid Jan 14 '14 at 12:34
1

It works for char type as well. Thank you for your helpful answer. – yves Baumes Jan 16 '16 at 14:01
2

@yvesBaumes what do you mean by "char type"? Python does not have chars. Only strings with length of 1 – Ayxan Haqverdili Jul 26 '19 at 19:19
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*Please Note:* The `.upper()` and `.lower()` functions do not modify the original `str` i.e. use `s = s.upper()` for effective results – Chaitanya Jan 08 '20 at 23:21

score 96 · Answer 2 · answered Feb 13 '12 at 07:56

To get upper case version of a string you can use str.upper:

s = 'sdsd'
s.upper()
#=> 'SDSD'

On the other hand string.ascii_uppercase is a string containing all ASCII letters in upper case:

import string
string.ascii_uppercase
#=> 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

score 19 · Answer 3 · answered Jun 27 '16 at 15:50

19

to make the string upper case -- just simply type

s.upper()

simple and easy! you can do the same to make it lower too

s.lower()

etc.

answered Jun 27 '16 at 15:50

Katie T

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score 18 · Answer 4 · edited Oct 16 '17 at 11:11

18

s = 'sdsd'
print (s.upper())
upper = raw_input('type in something lowercase.')
lower = raw_input('type in the same thing caps lock.')
print upper.upper()
print lower.lower()

edited Oct 16 '17 at 11:11

Community

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answered Jul 16 '14 at 00:49

H CODE

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Welcome to Stack Overflow @HCode! It is customary to add some commentary to your code. – aliteralmind Jul 16 '14 at 02:57

score 7 · Answer 5 · edited May 01 '18 at 05:56

for making uppercase from lowercase to upper just use

"string".upper()

where "string" is your string that you want to convert uppercase

for this question concern it will like this:

s.upper()

for making lowercase from uppercase string just use

"string".lower()

where "string" is your string that you want to convert lowercase

for this question concern it will like this:

s.lower()

If you want to make your whole string variable use

s="sadf"
# sadf

s=s.upper()
# SADF

score 5 · Answer 6 · answered Oct 15 '18 at 22:28

5

For questions on simple string manipulation the dir built-in function comes in handy. It gives you, among others, a list of methods of the argument, e.g., dir(s) returns a list containing upper.

answered Oct 15 '18 at 22:28

bartfrenk

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score 1 · Answer 7 · answered Sep 14 '21 at 05:58

1

For converting first letter of each word into capital in a sentence

s = 'this is a sentence'

str.title(s)

>>> 'This Is A Sentence'

answered Sep 14 '21 at 05:58

coderina

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How to change a string into uppercase

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