请求统计指定数据范围中重复值的数量并返回重复值列表

Got it, let's tackle this problem step by step. You need to:

• Count how many unique values are duplicated in your dataset
• Return those duplicates in a specific formatted list (like B 1 [val1] 2 [val2] ...)

First, let's confirm with your sample data to make sure we're on the same page:

A 1 23213400 2 25470790 3 25630720 4 23213400 5 23213400 6 26620401 7 25470790 8 40029022 9 22222290 10 22222290

From this, the duplicated values are 23213400 (3 occurrences), 25470790 (2 occurrences), and 22222290 (2 occurrences) — so the duplicate count is 3, and the formatted list should follow the B 1 [val] 2 [val] structure you specified.

Python Implementation #

Here's a straightforward script that handles this logic perfectly:

from collections import Counter

# Your input data (split into a list for easy processing)
input_data = "A 1 23213400 2 25470790 3 25630720 4 23213400 5 23213400 6 26620401 7 25470790 8 40029022 9 22222290 10 22222290".split()

# Extract only the value elements (skip "A" and the sequence numbers)
values = input_data[2::2]

# Count how many times each value appears
value_counts = Counter(values)

# Collect duplicates in the order they first appear (avoid duplicates in the result list)
seen_duplicates = set()
unique_duplicates = []
for val in values:
    if value_counts[val] > 1 and val not in seen_duplicates:
        unique_duplicates.append(val)
        seen_duplicates.add(val)

# Generate the required output format
duplicate_count = len(unique_duplicates)
formatted_output = ["B"]
for idx, val in enumerate(unique_duplicates, start=1):
    formatted_output.extend([str(idx), val])

# Print the results
print(f"重复值数量为: {duplicate_count}")
print("重复值列表:", " ".join(formatted_output))

How This Works #

• Extract Values: We split the input string into a list, then grab every second element starting from index 2 (since the input starts with A, followed by sequence number + value pairs).
• Count Occurrences: Using Counter from the collections module makes it trivial to tally how many times each value shows up.
• Preserve Order: We iterate through the original values list to collect duplicates in the order they first appear, using a set to avoid adding the same duplicate multiple times to our result.
• Format Output: We build the final formatted list by starting with B, then appending each index and duplicate value pair.

Sample Output #

When you run this script, you'll get exactly what you need:

重复值数量为: 3
重复值列表: B 1 23213400 2 25470790 3 22222290

You can adapt this script to other datasets just by updating the input_data variable to match your new input string.

内容的提问来源于stack exchange，提问作者Tuberose