tweaking random number

[Nikhil Verma]

Hi All

I want to generate a random number of 8 digits which involve 3 number and 5
digits.
Like this :-

def random_number():
# do something

random_number()
123abcde # first 3 numbers and 5 letters after the numbers.

I am able to generate the random number 8 digit like this:-

def random_number():
characters = list(string.ascii_lowercase + string.ascii_uppercase\
+ string.digits)
coll_rand = []
for i in range(8):
random.shuffle(characters)
coll_rand.append(characters[0])
return ''.join(coll_rand)

This generates like this Kkrgt56r

Thanks in advance

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Regards
Nikhil Verma
+91-958-273-3156
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Re: tweaking random number

[MRAB]

On 09/05/2012 08:01, Nikhil Verma wrote:

Hi All

I want to generate a random number of 8 digits which involve 3 number
and 5 digits.
Like this :-

def random_number():
 # do something

random_number()
123abcde # first 3 numbers and 5 letters after the numbers.

I am able to generate the random number 8 digit like this:-

def random_number():
 characters = list(string.ascii_lowercase + string.ascii_uppercase\
 + string.digits)
 coll_rand = []
 for i in range(8):
 random.shuffle(characters)
 coll_rand.append(characters[0])
 return ''.join(coll_rand)

This generates like this Kkrgt56r


Use random.choice to pick a random digit or a random letter.
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Re: tweaking random number

[Chris Angelico]

On Wed, May 9, 2012 at 5:01 PM, Nikhil Verma varma.nikhi...@gmail.com wrote:
 Hi All

 I want to generate a random number of 8 digits which involve 3 number and 5
 digits.

(That's 3 digits and 5 letters) Pretty easy. Do you want to
distinguish between uppercase and lowercase letters?

Your current random_number function (btw, I wouldn't call it number
as it isn't one) is most of one possible solution. Divide it into two
parts, one part that generates the digits and another part that
generates the letters. Your 'characters' template would thus be
different for the two parts.

There are other solutions, which involve the generation of less random
numbers, but your way will work.

ChrisA
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Re: tweaking random number

[Peter Otten]

Nikhil Verma wrote:

 Hi All
 
 I want to generate a random number of 8 digits which involve 3 number and
 5 digits.
 Like this :-
 
 def random_number():
 # do something
 
 random_number()
 123abcde # first 3 numbers and 5 letters after the numbers.
 
 I am able to generate the random number 8 digit like this:-
 
 def random_number():
 characters = list(string.ascii_lowercase + string.ascii_uppercase\
 + string.digits)
 coll_rand = []
 for i in range(8):
 random.shuffle(characters)
 coll_rand.append(characters[0])
 return ''.join(coll_rand)
 
 This generates like this Kkrgt56r
 
 Thanks in advance

If you generalize your random_number() function

 import random, string
 def random_code(n=8, 
chars=string.ascii_lowercase+string.ascii_uppercase+string.digits):
... return .join(random.choice(chars) for _ in range(n))
... 
 random_code()
'NgcLhYdR'
 random_code()
'j9gafcHh'
 random_code(chars=123ABC)
'C311BA31'
 random_code(n=4)
'MAsV'

you can use it as a building block quite easily:

 def three_five():
... return random_code(3, string.digits) + random_code(5, 
string.ascii_lowercase + string.ascii_uppercase)
... 
 three_five()
'656xEWmd'
 three_five()
'589XqZcI'
 three_five()
'168iOOIM'


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