[英]Ordered file combination with python
我有两个文件file1
和file2
,每个文件包含多个数字(每行一个数字)。 我需要创建第三个文件( output file
),该文件将两个文件合并在一起而没有任何重复编号。 将两个文件合并到一个文件中的代码应该是什么?
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)
假设您的输入文件位于当前工作目录中:
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,如果顺序很重要,您可以将它们都读入一个列表,然后写一个最终的列表,类似于:
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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