Hi, I want to create string in a for.
# Create string0, string1 ..... string10
for i in range [1,10]:
string="string"+i
But I have returned an error because i is not a string but integer.
How I can do it?
Thanks.
views:
176answers:
4
+5
A:
for i in range (1,10):
string="string"+str(i)
To get string0, string1 ..... string10, you could do like
>>> ["string"+str(i) for i in range(11)]
['string0', 'string1', 'string2', 'string3', 'string4', 'string5', 'string6', 'string7', 'string8', 'string9', 'string10']
S.Mark
2010-05-17 07:53:13
Am I missing something to get a downvote?
S.Mark
2010-05-17 08:52:47
Backticks are all sorts of silly.
Aaron Gallagher
2010-05-17 08:58:21
It's still worth mentioning that backticks are equivalent to `repr()`, not `str()`.
Bastien Léonard
2010-05-17 09:06:32
Bastien, Thanks for the note, but I think I don't put it back again.
S.Mark
2010-05-17 09:28:10
3 Downvotes? Really!
S.Mark
2010-05-17 09:31:38
Mmh, I tried to remove my vote (just a test), and then vote again; the vote is suppressed but I can't upvote it anymore... ("Your vote is now locked in unless this answer is edited")
Bastien Léonard
2010-05-17 09:56:50
@Bastien, yeah, there is 5 minutes window to undo up/downvotes, but once its over, its stuck and can't do different vote until next edit. I think thats by-design
S.Mark
2010-05-17 10:04:37
A:
for i in range[1,10]: string = "string" + str(i)
str(i) castsconverts the integer into a string.
Rizwan Kassim
2010-05-17 07:53:20
you only need to use a list for formatting when you have more than one format specifier, otherwise, it's ugly :)
Longpoke
2010-05-17 17:50:20
That's not a list, that's a tuple. And you also need it if the single item to be formatted is itself a tuple.
Ignacio Vazquez-Abrams
2010-05-17 20:48:51
+2
A:
for i in range(11):
string = "string{0}".format(i)
What you did (range[1,10]) is
- a TypeError since brackets denote an index (
a[3]) or a slice (a[3:5]) of a list, - a SyntaxError since
[1,10]is invalid, and - a double off-by-one error since
range(1,10)is[1, 2, 3, 4, 5, 6, 7, 8, 9], and you seem to want[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
And string = "string" + i is a TypeError since you can't add an integer to a string (unlike JavaScript).
Look at the documentation for Python's new string formatting method, it is very powerful.
Tim Pietzcker
2010-05-17 08:17:14