[英]python stdout function returns none on last line
I have a bunch of lines in an input text file: 我在输入文本文件中有一堆线:
field1;field2;...fieldn
that I what to convert to an output.json whose lines are: 我该将其转换为以下内容的output.json:
{field_name1:field1,field_name2:field2,...field_namen:fieldn}
So what I did is, using the following code: 所以我要做的是,使用以下代码:
from sys import stdin, stdout
import json
def txt_to_json(*args):
for line in stdin:
fields = [x.strip() for x in line.split(";")]
stdout.write(json.dumps(dict(zip(args, fields))) + "\n")
in a shell (if input.txt contains three fields): 在外壳程序中(如果input.txt包含三个字段):
python -c "from process_files import *; print txt_to_json('field_name1','field_name2','field_name3')" < input.txt > output.json
My output is fine except it contains None on the last line. 我的输出很好,除了它的最后一行不包含任何内容。 I tried to modify my function but cannot get rid of this last None.
我试图修改我的函数,但不能摆脱最后的None。
Thanks for the help 谢谢您的帮助
您的函数确实返回None
,您正在打印该函数的结果,然后将该结果通过管道传输到文件,删除print()
调用:
python -c "from process_files import *; txt_to_json('field_name1','field_name2','field_name3')" < input.txt > output.json
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