I've tried both of these versions:
import random
def r(n):
random.seed(1234)
for i in range(n):
x=random.uniform(-1,1)
y=random.uniform(-1,1)
return (x,y)
import random
def r(n):
random.seed(1234)
while n>0:
n-=1
x=random.uniform(-1,1)
y=random.uniform(-1,1)
return (x,y)
But both only produce 1 point.
I'm hoping to make it produce n random points (x,y) and have it print out all n points.
You just need to accumulate your results in a list and return the list. This works:
import random
def r(n):
random.seed(1234)
results = []
for i in range(n):
x=random.uniform(-1,1)
y=random.uniform(-1,1)
results.append((x,y))
return results
results = r(10)
print(results)
Out:
[(0.9329070713842775, -0.11853480164929464),
(-0.9850170598828256, 0.8219519248982483),
(0.878537994727528, 0.16445514611789824),
(0.3431269629759701, -0.8321235463258321),
(0.5329618655835926, -0.5263804492737645),
(-0.9383719565467801, 0.577545434472567),
(-0.3078220688057538, 0.24656295007833706),
(0.23163139020723045, -0.7028907225834249),
(-0.6338187051801367, -0.7711740606226247),
(-0.9707624390261818, -0.026496918790483326)]
You can create the list very succinctly using a list comprehension as shown below:
import random
random.seed(1234)
def r(n):
""" Create, print out, and return a list of `n` random points. """
points = [(random.uniform(-1,1), random.uniform(-1,1)) for _ in range(n)]
print(points)
return points
Use print instead of return in both of your cases
import random
def r(n):
random.seed(1234)
for i in range(n):
x=random.uniform(-1,1)
y=random.uniform(-1,1)
print(x,y)
At risk of confusing you before you've mastered the basics... If you change the return keyword to the yield keyword, it becomes a generator function which returns an iterator.
# this is a generator function now
def r(n):
random.seed(1234)
for i in range(n):
x=random.uniform(-1,1)
y=random.uniform(-1,1)
# `yield` instead of `return`
yield (x,y)
# collect iterator into list
print(list(r(3)))
returnstatement will finish yourr()function in the first iteration of theforloop. You can return all yournpoints from the function, as the previous answer informed. Or you can create a function that will return just a pair of points, and call it repeatedlyntimes.