import random
"""
Select N unique random indices from an existing list in Python.
Return the indices and print both the index and the corresponding value.
Approach:
- Use random.sample to select N unique indices from range(len(data)).
- This guarantees uniqueness and avoids manual shuffling.
- Then print each selected index and its corresponding value.
"""
def pick_unique_indices(size, count):
if count > size:
raise ValueError("Cannot pick more unique indices than the list contains.")
# Select N unique random indices
return random.sample(range(size), count)
def main():
# Example list
data = [5, 12, 5, 19, 5, 33, 47, 5, 58, 61, 17, 3, 5, 74, 83, 90, 6]
N = 6 # number of unique indices to pick
# Get unique random indices
indices = pick_unique_indices(len(data), N)
# Print results
print("Random unique indices and their values:")
for idx in indices:
print(f"index {idx} -> value {data[idx]}")
if __name__ == "__main__":
main()
"""
run:
Random unique indices and their values:
index 0 -> value 5
index 1 -> value 12
index 5 -> value 33
index 13 -> value 74
index 15 -> value 90
index 4 -> value 5
"""
