### Thread: Outout of array

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#### Outout of array

I've few questions.
1. How to generate float numbers in an array?
I use something like that
Code:
```import array
import random
a=array.array('i',(random.randint(-50,51) for i in xrange(10)));
print a```
This gives integer [-50; 50], but how to get float, for example, [-1, 1], not [-1, 1)?
2. How to output array in columns?
For example, I have generated array and I want to make output in 3 columns, how can I do it?
3. How to output array in rows?
Same that with columns, but, for example, in 10 rows.
2. numpy handles arrays more elegantly than does plain old python. Look for the enthought python distribution, or scipy.org

>>> random.random()
0.95659562170489

You might have to make lists of array to get "tables" using array. Yes, arrays don't support a "collection type".
3. One way to do that:
Code:
```''' array_floats1.py
create a Python array of 10 random floats between -1 and 1
print the elements with different options
'''

# allows Python27 to use Python3 print() options
from __future__ import print_function

import array
import random as rn

arr = array.array('f',[rn.random()*rn.choice([-1,1]) for i in range(10)])

# print 3 items max per row
count = 1
for item in arr:
#print(count, count % 3)
if count % 3 == 0:
print("%10.6f" % item, end="\n")
else:
print("%10.6f" % item, end=" ")
count += 1

print("")

print('-'*32)

# print 1 item per row
for item in arr:
print("%10.6f" % item)

''' potential output -->
-0.357831  -0.926154   0.836476
0.317901  -0.845858  -0.940639
0.895811   0.133088   0.346653
0.618086
--------------------------------
-0.357831
-0.926154
0.836476
0.317901
-0.845858
-0.940639
0.895811
0.133088
0.346653
0.618086
'''```