In python what is the difference between random uniform and random random

Question

In python for the random module  what is the difference between random uniform   and random random    They both generate pseudo random numbers  random uniform   generates numbers from a uniform distribution and random random   generates the next random number  What is the difference

User · Answer

In random random    the output lies between 0  amp  1   and it takes no input parameters  Whereas random uniform   takes parameters   wherein you can submit the range of the random number  e g  import random as ra  print ra random    print ra uniform 5 10   OUTPUT - 0 672485369423  7 9237539416

User · Answer

random random   gives you a random floating point number in the range  0 0  1 0   so including 0 0  but not including 1 0 which is also known as a semi-open range   random uniform a  b  gives you a random floating point number in the range  a  b    where rounding may end up giving you b    The implementation of random uniform   uses random random   directly   def uniform self  a  b        Get a random number in the range  a  b  or  a  b  depending on rounding       return a    b-a    self random     random uniform 0  1  is basically the same thing as random random    as 1 0 times float value closest to 1 0 still will give you float value closest to 1 0 there is no possibility of a rounding error there

User · Answer

Apart from what is being mentioned above   uniform   can also be used for generating multiple random numbers that too with the desired shape which is not possible with  random    np random seed 99  np random random     generates 0 6722785586307918   while the following code  np random seed 99  np random uniform 0 0  1 0  size    5 2     generates this  array   0 67227856  0 4880784            0 82549517  0 03144639           0 80804996  0 56561742           0 2976225   0 04669572           0 9906274   0 00682573      This can t be done with random       and if you re generating the random      numbers for ML related things  most of the time  you ll end up using  uniform

User · Answer

The difference is in the arguments  It s very common to generate a random number from a uniform distribution in the range  0 0  1 0   so random random   just does this  Use random uniform a  b  to specify a different range

User · Answer

According to the documentation on random uniform      Return a random floating point number N such that a  lt   N  lt   b for a  lt   b and b  lt   N  lt   a for b  lt  a    while random random      Return the next random floating point number in the range  0 0  1 0     I e  with random uniform you specify a range you draw pseudo-random numbers from  e g  between 3 and 10  With random random you get a number between 0 and 1

[python] In python, what is the difference between random.uniform() and random.random()?

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