Question

我正在尝试将netCDF文件转换为csv。文件存储在thredds服务器中。我写下了从中读取文件的代码 Thredds服务器并从netCDF文件中存在的变量列表中选择六个变量，并以csv格式本地存储它们。

from datetime import datetime
from netCDF4 import Dataset
import netCDF4
import pandas as pd
import csv
def get_thredds_url(datetime_group, forecast_hour):
    base_url="path"
    thredds_url="path"
    cycle_hour = "%02d" % datetime_group.hour
    file_str=datetime_group.strftime("%Y%m%d%H")+"/gfs.t%sz.pgrb2.0p25.f%03d" % \
        (cycle_hour, forecast_hour)
    url = base_url + thredds_url + file_str
    return (url)

下面的代码显示了所需的变量。

def main():

    datetime_group = datetime(2017, 9, 26, 0)
    forecast_hour = 240

    url = get_thredds_url(datetime_group, forecast_hour)
    print (url)

    nc_handle=Dataset(url)
    #print (nc_handle.variables.keys())
    lat=nc_handle.variables['lat'][:]
    lon=nc_handle.variables['lon'][:]
    issue_time=nc_handle.variables['time'][:]
    valid_time=nc_handle.variables['time1'][:]
    temp=nc_handle.variables['Temperature_height_above_ground'][:]
    dewpoint_temp=lat=nc_handle.variables['Dewpoint_temperature_height_above_ground'][:]
    dtime = netCDF4.num2date(issue_time[:],units=units)


 tmp = pd.Series(temp, index=dtime) 

    tmp.to_csv('temp.csv',index=True, header=True)
    csvwriter = csv.writer(tmp,  delimiter=',')
    print (csvwriter)





if __name__ == "__main__":
    main()

问题：我无法将文件写入csvnformat，其中包含所有变量，如lat，lon，time，time1，Temperature_height_above_ground。期望的输出如下：

tmp.csv

 lat lon time time1 Temperature_height_above_ground
1 ... .. ...  ....  ......
2 ... .. ...  ....  ......
3 ... .. ...  ....  ......

任何人都可以帮我解决这个问题吗？

提前致谢！

使用Python将netCDF文件转换为csv

0 个答案: