installer itertools
sudo pip3 install more-itertools
Nels
sudo pip3 install more-itertoolsfrom itertools import combinations
from itertools import permutations
colors = ["red", "green", "blue", "purple"]
ratios = [0.2, 0.3, 0.1, 0.4]
for i, color in enumerate(colors):
ratio = ratios[i]
print("{}% {}".format(ratio * 100, color))
for start, end in zip(start_points, end_points):
if start[0] == -end[0] and start[1] == -end[1]:
print(f"Point {start[0]},{start[1]} was negated.")
def combinations(iterable, r):
# combinations('ABCD', 2) --> AB AC AD BC BD CD
# combinations(range(4), 3) --> 012 013 023 123
pool = tuple(iterable)
n = len(pool)
if r > n:
return
indices = range(r)
yield tuple(pool[i] for i in indices)
while True:
for i in reversed(range(r)):
if indices[i] != i + n - r:
break
else:
return
indices[i] += 1
for j in range(i+1, r):
indices[j] = indices[j-1] + 1
yield tuple(pool[i] for i in indices)>>> head, middle, tail = numbers[0], numbers[1:-1], numbers[-1]
>>> head, *middle, tail = numbers