CODEWITHSUNDEEP
pythonanacondanetcdf
user8060881
user8060881

Reputation:

netCDF4 - Python error

Can anyone tell me what I did wrong? I am using python-conda, and the files I have from http://meop40.troja.mff.cuni.cz:11180/gw.projekt/data.stratopauza/netcdf.profily/ Why it tells me that file doesn't exist?

>>> import netCDF4
>>> import pandas as pd
>>> import matplotlib.pyplot as plt
>>> url = 'http://meop40.troja.mff.cuni.cz:11180/gw.projekt/data.stratopauza/netcdf.profily/atmPrf_C001.2010.227.00.03.G04_2013.3520_nc'
>>> nc = netCDF4.Dataset(url)
**syntax error, unexpected WORD_WORD, expecting SCAN_ATTR or SCAN_DATASET or SCAN_ERROR
context: <!DOCTYPE^ HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL /gw.projekt/data.stratopauza/netcdf.profily/atmPrf_C001.2010.227.00.03.G04_2013.3520_nc.dds was not found on this server.</p><hr><address>Apache/2.4.12 (Ubuntu) Server at meop40.troja.mff.cuni.cz Port 11180</address></body></html>
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "netCDF4\_netCDF4.pyx", line 1811, in netCDF4._netCDF4.Dataset.__init__ (netCDF4\_netCDF4.c:12626)
IOError: NetCDF: file not found**

Upvotes: 1

Views: 5373

Answers (1)

Eric Bridger
Eric Bridger

Reputation: 3794

NetCDF4.Dataset() can only access remote NetCDF files which are served by an OPeNDAP service, which can return metadata about the file. The error message returned is incorrect and misleading.

There is a brief tutorial, which mentions this and gives basic information at: http://unidata.github.io/netcdf4-python/#section1

I downloaded the file and had no problem opening the file. You should use the method in the answer to your previous question https://stackoverflow.com/a/44622713/1211981

Update: Go to:

http://meop40.troja.mff.cuni.cz:11180/gw.projekt/data.stratopauza/netcdf.profily/

Click one or more of the links and save to a folder where you will run your script. Change your script or python commands to:

>>> url = 'atmPrf_C001.2010.227.00.03.G04_2013.3520_nc'
>>> nc = netCDF4.Dataset(url)

netCDF4.Dataset() will take either a url or a local file name and work the same way. In this case it will recognize the file as a NetCDF / OPeNDAP compatible.

Upvotes: 1

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