求助：Python合并两个文本文件整数并排序保存的实现方法

Hey there! I see the problem with your current code—it’s just dumping the raw content of both files into all_numbers.txt without actually processing the numbers to sort them. Let’s fix that up so your final file has all integers in clean ascending order.

What’s Off with the Original Code? #

Your current code copies text directly from each input file, which preserves the messy, unsorted order of numbers in both numbers1.txt and numbers2.txt and just sticks them end-to-end. We need to:

1. Read every number from both files as actual integers (not just text)
2. Gather all these numbers into a single list
3. Sort the list properly
4. Write the sorted numbers to all_numbers.txt

Updated Working Code #

# List of input files to process
filenames = ['numbers1.txt', 'numbers2.txt']
all_numbers = []

# Read and parse numbers from each file
for filename in filenames:
    with open(filename, 'r') as infile:
        # Split file content into number strings, then convert each to integer
        numbers = [int(num_str) for num_str in infile.read().split()]
        all_numbers.extend(numbers)

# Sort all collected numbers in ascending order
all_numbers.sort()

# Write the sorted result to the output file
with open('all_numbers.txt', 'w') as outfile:
    # Convert integers back to strings and join with spaces (matching input format)
    outfile.write(' '.join(str(num) for num in all_numbers))

print("Your file is saved under all_numbers.txt")

How This Works #

• Parsing Numbers: We use split() to break the file’s text into individual number strings, then convert each to an integer with a list comprehension. This handles spaces and any accidental newlines in your input files.
• Collecting All Numbers: The extend() method adds every number from each file to our main all_numbers list, giving us one big collection of all integers.
• Sorting: The sort() method sorts the list in-place in ascending order (the default behavior for integers).
• Writing the Result: We convert the sorted integers back to strings, join them with spaces (to match your input file format), and write the entire string to all_numbers.txt.

After running this code, your all_numbers.txt will contain:
10 20 30 40 50 60 80 100 101 150 999

内容的提问来源于stack exchange，提问作者user12739323