我正在一个涉及使用hdfs的项目中，我想将arduino数据每3s存入一个csv文件中的hadoop hdfs中。
csv文件示例：
“ temp1”，“ datetime1”，“ location1”
“ temp2”，“ datetime2”，“ location2”
“ temp3”，“ datetime3”，“ location3”
我想每3秒向此csv文件添加一行。
我已经尝试了从arduino的串行端口读取并写入nosql数据库的python代码，我尝试执行相同的操作，但是在hdfs路径上发现了一些问题。
# Creating a simple Pandas DataFrame
liste_temp = [temp_string,datetime.datetime.now(),temperature_location]
df = pd.DataFrame(data = {'temp' : liste_temp})
# Writing Dataframe to hdfs
with client_hdfs.write('/test/temp.csv', encoding = 'utf-8') as writer:
df.to_csv(writer)
错误：
File "templog.py", line 33, in <module> with client_hdfs.write('/test/temp.csv', encoding = 'utf-8') as writer: File "C:\Users\nouhl\AppData\Local\Programs\Python\Python37-32\lib\site-packages\hdfs\client.py", line 460, in write raise
InvalidSchema("No connection adapters were found for '%s'" % url) requests.exceptions.InvalidSchema: No connection adapters were found for 'hdfs://localhost:9870/webhdfs/v1/test/temp.csv