In Python, How Do I Create a String of N Characters in One Line of Code?
I Need to Generate a String with N Characters in Python. Is There a One Line Answer to Achieve This with the Existing Python Library? for Instance, I Need a...
I need to generate a string with n characters in Python. Is there a one line answer to achieve this with the existing Python library? For instance, I need a string of 10 letters:
string_val = 'abcdefghij'
6 Answers
To simply repeat the same letter 10 times:
string_val = "x" * 10 # gives you "xxxxxxxxxx"
And if you want something more complex, like n random lowercase letters, it's still only one line of code (not counting the import statements and defining n):
from random import choice
from string import ascii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) for i in range(n))
The first ten lowercase letters are string.lowercase[:10] (if you have imported the standard library module string previously, of course;-).
Other ways to "make a string of 10 characters": 'x'*10 (all the ten characters will be lowercase xs;-), ''.join(chr(ord('a')+i) for i in xrange(10)) (the first ten lowercase letters again), etc, etc;-).
if you just want any letters:
'a'*10 # gives 'aaaaaaaaaa'
if you want consecutive letters (up to 26):
''.join(['%c' % x for x in range(97, 97+10)]) # gives 'abcdefghij'
Why "one line"? You can fit anything onto one line.
Assuming you want them to start with 'a', and increment by one character each time (with wrapping > 26), here's a line:
>>> mkstring = lambda(x): "".join(map(chr, (ord('a')+(y%26) for y in range(x))))
>>> mkstring(10)
'abcdefghij'
>>> mkstring(30)
'abcdefghijklmnopqrstuvwxyzabcd'
This might be a little off the question, but for those interested in the randomness of the generated string, my answer would be:
import os
import string
def _pwd_gen(size=16):
chars = string.letters
chars_len = len(chars)
return str().join(chars[int(ord(c) / 256. * chars_len)] for c in os.urandom(size))
If you can use repeated letters, you can use the * operator:
>>> 'a'*5
'aaaaa'
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
