Random number between 0 and 1 in python

Question

I want a random number between 0 and 1  like 0 3452  I used random randrange 0  1  but it is always 0 for me  What should I do

User · Answer

you can use use numpy random module  you can get array of random number in shape of your choice you want   gt  gt  gt  import numpy as np  gt  gt  gt  np random random 1  0  0 17425892129128229  gt  gt  gt  np random random  3 2   array    0 7978787    0 9784473             0 49214277   0 06749958            0 12944254   0 80929816     gt  gt  gt  np random random  3 1   array    0 86725993            0 36869585            0 2601249      gt  gt  gt  np random random  4 1   array    0 87161403            0 41976921            0 35714702            0 31166808     gt  gt  gt  np random random sample   0 47108547995356098

User · Answer

You can use random uniform  import random random uniform 0  1

User · Answer

random randrange 0 2  this works

User · Answer

random random   does exactly that   gt  gt  gt  import random  gt  gt  gt  for i in range 10           print random random         0 908047338626 0 0199900075962 0 904058545833 0 321508119045 0 657086320195 0 714084413092 0 315924955063 0 696965958019 0 93824013683 0 484207425759   If you want really random numbers  and to cover the range  0  1     gt  gt  gt  import os  gt  gt  gt  int from bytes os urandom 8   byteorder  big       1  lt  lt  64  - 1  0 7409674234050893

User · Answer

I want a random number between 0 and 1  like 0 3452   random random   is what you are looking for      From python docs    random random   Return the next random floating point number in the   range  0 0  1 0       And  btw  Why your try didn t work    Your try was  random randrange 0  1      From python docs    random randrange   Return a randomly selected element from range start  stop  step   This is equivalent to choice range start  stop  step    but doesn   t actually build a range object    So  what you are doing here  with random randrange a b  is choosing a random element from range a b   in your case  from range 0 1   but  guess what   the only element in range 0 1   is 0  so  the only element you can choose from range 0 1   is 0  that s why you were always getting 0 back

User · Answer

My variation that I find to be more flexible   str Key                str FullKey             str CharacterPool    01234ABCDEFfghij -   for int I in range 64        str Key   random choice str CharacterPool       str FullKey   str FullKey   str Key

User · Answer

RTM  From the docs for the Python random module   Functions for integers   random randrange stop  random randrange start  stop   step        Return a randomly selected element from range start  stop  step       This is equivalent to choice range start  stop  step    but doesn   t     actually build a range object    That explains why it only gives you 0  doesn t it   range 0 1  is  0    It is choosing from a list consisting of only that value    Also from those docs   random random           Return the next random floating point number in the range  0 0  1 0     But if your inclusion of the numpy tag is intentional  you can generate many random floats in that range with one call using a np random function

[python] Random number between 0 and 1 in python

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