Random numbers and functions

[Deathwing]

Hi everyone, I'm fairly new with python and as such am playing around alot with just basic coding/scripting. I've spent the better part of today working with random numbers. Thanks for all your comments and advice it's really helped me to learn. I have a new question that I an thinking about right now, I have an idea of how to proceed but wanted to pose this question to get some advice.

Here is what I am trying to do and what I have figured out so far.

• I then want the script to generate random numbers that are with the bounds of the "upper left and lower right" vectors/coordinates
• So, basically none of the randomly generated decimal numbers can go out of the bounds of the "upper left and lower right" coordinates.
• So far by playing around I have coded the following thanks to the knowledge gained from the help of others on this forum.

import random
 
f = open(r "ni.txt", "w" )
 
#defining num function
 
def num(n):
      x,y = 150,200
      whil n < x and n < y:
            n += 1
            f.writelines(["%10.4f  %10.4f\n" % (random.random()*random.randrange(1,35),random.random()*random.randrange(1,35))])
 
# calling function num
num(random.randrange(1))
 
f.close
 
raw_input("\nPress ENTER to exit")
 
#-----------------------------------------
# output generated
#-----------------------------------------
 
   10.8011     7.2231
    7.1643    27.9521
    9.6282     1.6043
    0.2221    33.7514
    8.5689    11.9781
   14.6153     5.3605
   21.9485     8.3382
    2.7590    12.3986
    0.5102     2.3836
    1.3386    19.3828
    0.9377     0.4229
    1.6024     1.5889
    8.4589     4.4812
   29.6486     3.9461
   12.8277     3.5010
   22.9659     4.1116
   17.1734    17.1360
    7.3082     1.6732
    0.8224     0.2964
    1.0680     5.9264
    8.6494     3.6651
    7.1057     5.5809
    2.4803    10.0084
    6.0981     7.9107
    2.0459     2.5169
    3.9406    13.4154
    0.2515     7.6117
    6.7652    28.2090
   11.9972     9.7133
   12.6741    10.6329
   28.5646     6.6041
    5.0474     3.1988
    1.8366    17.3606
 
 

Now I know this is not the correct script but this is what I've got so far any advice/help would be greatly appreciated thanks everyone.

Sincerely,
Deathwing

[bvdet]

Hi everyone, I'm fairly new with python and as such am playing around alot with just basic coding/scripting. I've spent the better part of today working with random numbers. Thanks for all your comments and advice it's really helped me to learn. I have a new question that I an thinking about right now, I have an idea of how to proceed but wanted to pose this question to get some advice.

Here is what I am trying to do and what I have figured out so far.

• I then want the script to generate random numbers that are with the bounds of the "upper left and lower right" vectors/coordinates
• So, basically none of the randomly generated decimal numbers can go out of the bounds of the "upper left and lower right" coordinates.
• So far by playing around I have coded the following thanks to the knowledge gained from the help of others on this forum.

import random
 
f = open(r "ni.txt", "w" )
 
#defining num function
 
def num(n):
      x,y = 150,200
      whil n < x and n < y:
            n += 1
            f.writelines(["%10.4f  %10.4f\n" % (random.random()*random.randrange(1,35),random.random()*random.randrange(1,35))])
 
# calling function num
num(random.randrange(1))
 
f.close
 
raw_input("\nPress ENTER to exit")
 
#-----------------------------------------
# output generated
#-----------------------------------------
 
   10.8011     7.2231
    7.1643    27.9521
    9.6282     1.6043
    0.2221    33.7514
    8.5689    11.9781
   14.6153     5.3605
   21.9485     8.3382
    2.7590    12.3986
    0.5102     2.3836
    1.3386    19.3828
    0.9377     0.4229
    1.6024     1.5889
    8.4589     4.4812
   29.6486     3.9461
   12.8277     3.5010
   22.9659     4.1116
   17.1734    17.1360
    7.3082     1.6732
    0.8224     0.2964
    1.0680     5.9264
    8.6494     3.6651
    7.1057     5.5809
    2.4803    10.0084
    6.0981     7.9107
    2.0459     2.5169
    3.9406    13.4154
    0.2515     7.6117
    6.7652    28.2090
   11.9972     9.7133
   12.6741    10.6329
   28.5646     6.6041
    5.0474     3.1988
    1.8366    17.3606
 
 

Now I know this is not the correct script but this is what I've got so far any advice/help would be greatly appreciated thanks everyone.

Sincerely,
Deathwing

Do not forget the '()' after 'f.close'! How about this:

import random
 
x, y = 150, 200
f = open('your_file', 'w')
f.writelines(['%12.8f %14.8f\n' % (random.random()+random.randint(0,x-1), random.random()+random.randint(0, y-1)) for _ in range(35)])
f.close()
'''
144.97567827    89.82142758
 54.80707963   105.65392938
133.31185879   152.92742104
 64.71902430    58.47761159
104.39356908   195.75766194
...........................................
'''

[Deathwing]

Do not forget the '()' after 'f.close'! How about this:

import random
 
x, y = 150, 200
f = open('your_file', 'w')
f.writelines(['%12.8f %14.8f\n' % (random.random()+random.randint(0,x-1), random.random()+random.randint(0, y-1)) for _ in range(35)])
f.close()
'''
144.97567827    89.82142758
 54.80707963   105.65392938
133.31185879   152.92742104
 64.71902430    58.47761159
104.39356908   195.75766194
...........................................
'''

hmmm not sure.. but I'll check it out thanks for the advice not 100% sure what the entire code means so I'll have to study it first hehehehehe... who knew programming would be such a learning curve hehehe

[Deathwing]

Do not forget the '()' after 'f.close'! How about this:

import random
 
x, y = 150, 200
f = open('your_file', 'w')
f.writelines(['%12.8f %14.8f\n' % (random.random()+random.randint(0,x-1), random.random()+random.randint(0, y-1)) for _ in range(35)])
f.close()
'''
144.97567827    89.82142758
 54.80707963   105.65392938
133.31185879   152.92742104
 64.71902430    58.47761159
104.39356908   195.75766194
...........................................
'''

Hey dvbet thanks but I don't think that code is going to work. What I'm trying to do is designate an upper left coordinate and a lower right coordinate. Then within the bounds of those two coordinate I'm trying to generate a bunch of random numbers. So basically if you could picture a square grid in your mind , where you have an upperl left corner and a lower right corner.

Then in your in generate a bunch of random points that eash have x and y coordinates within this gride. So far this is my logic, my "Upper left: x = 373362.31, y = 43695559.51 and my "lower right coordinates are: x = 622395.55, 4038425.26.

This is why I was originally working on a function that has five variables I was thinking, x1, y1, x2, y2, and a num or n that would be used to produce all of the other random points.


I'm still not sure how to get this but I'm still playing around with it

[bvdet]

Hey dvbet thanks but I don't think that code is going to work. What I'm trying to do is designate an upper left coordinate and a lower right coordinate. Then within the bounds of those two coordinate I'm trying to generate a bunch of random numbers. So basically if you could picture a square grid in your mind , where you have an upperl left corner and a lower right corner.

Then in your in generate a bunch of random points that eash have x and y coordinates within this gride. So far this is my logic, my "Upper left: x = 373362.31, y = 43695559.51 and my "lower right coordinates are: x = 622395.55, 4038425.26.

This is why I was originally working on a function that has five variables I was thinking, x1, y1, x2, y2, and a num or n that would be used to produce all of the other random points.


I'm still not sure how to get this but I'm still playing around with it

We can easily modify the code to work that way:

import random
 
xUL = 373362.31
yUL = 43695559.51
xLR = 622395.55
yLR = 4038425.26
 
f = open(r'H:\TEMP\temsys\RandomNums3.txt', 'w')
f.writelines(['%9.2f %14.2f\n' % (random.uniform(xUL,xLR), random.uniform(yLR, yUL)) for _ in range(35)])
f.close()
 
'''
450742.25    15904885.61
408010.58    17529876.24
509410.49    31210428.63
609751.61    28548191.36
496748.10    13634931.19
401620.04    18545059.27
472709.78    19027787.41
388559.39    24144909.11
524567.31    18631123.05
511758.70    39517663.45
.....................................
'''

You can call me BV.

[Deathwing]

We can easily modify the code to work that way:

import random
 
xUL = 373362.31
yUL = 43695559.51
xLR = 622395.55
yLR = 4038425.26
 
f = open(r'H:\TEMP\temsys\RandomNums3.txt', 'w')
f.writelines(['%9.2f %14.2f\n' % (random.uniform(xUL,xLR), random.uniform(yLR, yUL)) for _ in range(35)])
f.close()
 
'''
450742.25    15904885.61
408010.58    17529876.24
509410.49    31210428.63
609751.61    28548191.36
496748.10    13634931.19
401620.04    18545059.27
472709.78    19027787.41
388559.39    24144909.11
524567.31    18631123.05
511758.70    39517663.45
.....................................
'''

You can call me BV.

wow! thanks again BV, to be honest I don't completely understand all of that code so as usual I will have to study it but I'm sure I can figure out the madness behind your extremely logical and efficient code writing , hehehehe.

[bvdet]

wow! thanks again BV, to be honest I don't completely understand all of that code so as usual I will have to study it but I'm sure I can figure out the madness behind your extremely logical and efficient code writing , hehehehe.

You are welcome. Thank YOU for sharing your problem with us and for the feedback.

[Deathwing]

You are welcome. Thank YOU for sharing your problem with us and for the feedback.

Hey okay... so I got a new question related to this one ? What if I want to allow the user to enter their own UL x and y and own LR x and y coordinates ? How would I go about doing that ? Here is what I have figured out so far.

import random
 
print\
       """
                            #---------------#
                            #    RPG 1.0    #
                            #---------------#
 
Welcome to Rndom_Point_Generator 1.0(RPG 1.0). RPG is very simple to use.
RPG generates a series of random points and writes these points to a .xyz
file.  In order to generate these points RPG asks the user to input two sets
of variables, an upper_left and lower_right set of coordinates. It then
proceeds to generate random points within the bounds of the upper_left and
lower_right coordinate values.
      """
 
 
 
 
print "\nPlease enter the upper left coordinates\n"
xUL = float(raw_input("enter your x value: "))
yUL = float(raw_input("enter you y value: "))
 
print "\nPlease enter the lower right coordinates\n"
xLR = float(raw_input("enter your x value: "))
yLR = float(raw_input("enter your y value: "))
 
 
f = open(r'xyz.txt', 'w')
 
 
f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,XLR),random.uniform (yLR,yUL))for _ in range(35)])
 
 
f.close()
 
 
raw_input("\nPress Enter to exit.")
 
 
 
 

I know it's not much different at all from what you've already explained BV but I am able to get the user to enter input I just can't get an output.

[bvdet]

Hey okay... so I got a new question related to this one ? What if I want to allow the user to enter their own UL x and y and own LR x and y coordinates ? How would I go about doing that ? Here is what I have figured out so far.

import random
 
print\
       """
                            #---------------#
                            #    RPG 1.0    #
                            #---------------#
 
Welcome to Rndom_Point_Generator 1.0(RPG 1.0). RPG is very simple to use.
RPG generates a series of random points and writes these points to a .xyz
file.  In order to generate these points RPG asks the user to input two sets
of variables, an upper_left and lower_right set of coordinates. It then
proceeds to generate random points within the bounds of the upper_left and
lower_right coordinate values.
      """
 
 
 
 
print "\nPlease enter the upper left coordinates\n"
xUL = float(raw_input("enter your x value: "))
yUL = float(raw_input("enter you y value: "))
 
print "\nPlease enter the lower right coordinates\n"
xLR = float(raw_input("enter your x value: "))
yLR = float(raw_input("enter your y value: "))
 
 
f = open(r'xyz.txt', 'w')
 
 
f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,XLR),random.uniform (yLR,yUL))for _ in range(35)])
 
 
f.close()
 
 
raw_input("\nPress Enter to exit.")
 
 
 
 

I know it's not much different at all from what you've already explained BV but I am able to get the user to enter input I just can't get an output.

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,XLR),random.uniform

SHOULD BE:

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform

Python is case sensitive.

[Deathwing]

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,XLR),random.uniform

SHOULD BE:

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform

Python is case sensitive.

sorry, that was a typo on my part. I now have the problem that the program seems to work but the ".txt" file that is created is blank empty, not filled in.

[bvdet]

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,XLR),random.uniform

SHOULD BE:

f.writelines(['9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform

Python is case sensitive.

I noticed another typo:

f.writelines(['%9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform

You had a missing '%'.

[Deathwing]

I noticed another typo:

f.writelines(['%9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform

You had a missing '%'.

awk... stupid me! thanks BV I had no idea typo's could be so evil in python hehehehe. I'll be more careful next time. :)

[Deathwing]

awk... stupid me! thanks BV I had no idea typo's could be so evil in python hehehehe. I'll be more careful next time. :)

I've now been experimenting with the command line, how could I convert this so that it would work on the command line ? I looked at the sys module and getopt but don't quite understand them? Suggestions ?

[bartonc]

I've now been experimenting with the command line, how could I convert this so that it would work on the command line ? I looked at the sys module and getopt but don't quite understand them? Suggestions ?

Do you mean that you would like to replace raw_input() with command-line arguments?

import sys
print sys.argv

will show all the command-line arguments pass when the script was invoked:

> pyhon theScript.py arg1 arg2 arg_n

[Deathwing]

Do you mean that you would like to replace raw_input() with command-line arguments?

import sys
print sys.argv

will show all the command-line arguments pass when the script was invoked:

> pyhon theScript.py arg1 arg2 arg_n

Thanks bartonc ! that's a good suggestions I came up with this code that works what do you think ? Any other ways I could have acomplished it ?

import sys,random
 
if len(sys.argv) !=6:
    sys.exit("You must enter at least 5 values")
 
xUL = float(sys.argv[1])
yUL = float(sys.argv[2])
xLR = float(sys.argv[3])
yLR = float(sys.argv[4])
points = int(sys.argv[5])
 
 
 
f = open(r'points.xyz', 'w')
 
 
f.writelines(['%9.2f%14.2f\n' % (random.uniform(xUL,xLR),random.uniform(yLR,yUL))for _ in range(points)])
 
 
f.close()
 
print '\nThanks for using RPG 1.0, your "points.xyz" file should now have been created.'
 
raw_input("\nPress Enter to exit.")