[英]Ordered file combination with python
我有兩個文件file1
和file2
,每個文件包含多個數字(每行一個數字)。 我需要創建第三個文件( output file
),該文件將兩個文件合並在一起而沒有任何重復編號。 將兩個文件合並到一個文件中的代碼應該是什么?
File1: 1 2 7 9 15 (1 number per line)
File2: 1 8 12 13 14 16 (1 number per line)
Outputfile: 1 2 7 8 9 12 13 14 15 16 (1 number per line)
假設您的輸入文件位於當前工作目錄中:
unique_elements = set()
for filename in ['file1', 'file2']:
with open(filename, 'r') as f:
for l in f.readlines():
unique_elements.add(int(l.strip()))
sorted_list = list(unique_elements)
sorted_list.sort()
with open('output_file', 'w') as f:
for number in sorted_list:
f.write('{}\n'.format(number))
因此,如果順序很重要,您可以將它們都讀入一個列表,然后寫一個最終的列表,類似於:
numbers = []
with open(file1, 'r') as inputfile:
for row in inputfile.readlines():
number = int(row)
if number not in numbers:
numbers.append(number)
with open(file2, 'r') as inputfile:
for row in inputfile.readlines():
number = int(row)
if number not in numbers:
numbers.append(number)
numbers.sort()
with open(file3, 'w') as outputfile:
for number in numbers:
outputfile.write("%d\n" % number)
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