使用Python在hdfs上读/写文件

Question

I am a newbie to Python, I want to read a file from hdfs (which I have achieved).

after reading the file I am doing some string operations and I want to write these modified contents into the output file.

Reading the file I achieved using subprocess (which took a lot of time) since open didn't work for me.

cat = Popen(["hadoop", "fs", "-cat", "/user/hdfs/test-python/input/test_replace"],stdout=PIPE)

Now, how to write to the output file with the modified contents is the question.

Your help is highly appreciated

Answer 1

您可以使用库来读取和写入HDFS，例如https://github.com/mtth/hdfs