Question

我试图获取两个csv文件A.csv和B.csv之间的区别，以获取在第二个文件中添加的新行。 A.csv具有以下数据。

acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    Redundant/RSK

B.csv有以下数据。

acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    Redundant/RSK
acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    DT/89

使用以下脚本编写添加到输出文件中的新行。

input_file1 = "A.csv"
input_file2 = "B.csv"
output_path = "out.csv"

with open(input_file1, 'r') as t1:
    fileone = set(t1)
with open(input_file2, 'r') as t2, open(output_path, 'w') as outFile:
    for line in t2:
        if line not in fileone:
            outFile.write(line)

预期输出为：

acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    DT/89

通过上述脚本获得的输出是：

acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    Redundant/RSK
acct    ABC     88888888    99999999    ABC-GHD 4/1/18  4   1   2018    DT/89

我不确定我在哪里犯了错误，尝试调试它但没有任何进展。

Answer 1

您需要小心尾随换行符。因此，在比较之前删除换行更安全，然后在写入时将其添加回来：

input_file1 = "A.csv"
input_file2 = "B.csv"
output_path = "out.csv"

with open(input_file1, 'r') as t1:
    fileone = set(t1.read().splitlines())

with open(input_file2, 'r') as t2, open(output_path, 'w') as outFile:
    for line in t2:
        line = line.strip()

        if line not in fileone:
            outFile.write(line + '\n')

发出两个csv文件之间的计算差异

1 个答案: