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[英]How do i structure my Python submodule with a lot of files, so that i have to import only one module
[英]I have a lot of netcdf files, how would I use xarray to upload all the files into one python notebook?
我有 12 個 netcdf 文件的 1 個文件夾。 我如何使用 xarray 將所有 netcdf 文件合並到一個數據數組中?
該文件夾代表 2015 年,12 個 netcdf 文件代表 2015 年每個月的數據。
我想也許我可以通過運行 for 循環來嘗試操作字符串並更改字符串中文件的每個編號,因為我的文件是通過以下方式組織的(2015 年):
EN.4.2.1.f.analysis.g10.201501.nc
EN.4.2.1.f.analysis.g10.201502.nc
EN.4.2.1.f.analysis.g10.201503.nc
....
我正在加載一個 netcdf 文件,例如:
import numpy as np
from scipy import stats
import matplotlib.pyplot as plt
import netCDF4 as s
import glob
import xarray as xr
from datetime import datetime
inpath='../../Data/EN.4.2.1_analyses/EN.4.2.1.analyses.g10.2015/'
# just loading in the first month (january) of 2015
en4_2015 = xr.open_dataset(inpath+'EN.4.2.1.f.analysis.g10.201501.nc')
如何將所有 netcdf 文件組合成一個數組而不是 12 個不同的 xarray?
我試過了:
import glob
import xarray as xr
from datetime import datetime
# List all matching files
files = glob.glob(inpath+'*.nc')
# Create list for
individual_files = []
# Loop through each file in the list
for i in files:
# Load a single dataset
timestep_ds = xr.open_dataset(i)
# Create a new variable called 'time' from the `time_coverage_start` field, and
# convert the string to a datetime object so xarray knows it is time data
timestep_ds['time'] = datetime.strptime(timestep_ds.time_coverage_start,
"%Y-%m-%dT%H:%M:%S.%fZ")
# Add the dataset to the list
individual_files.append(timestep_ds)
# Combine individual datasets into a single xarray along the 'time' dimension
modis_ds = xr.concat(individual_files, dim='time')
print(modis_ds)
AttributeError Traceback (most recent call last)
<ipython-input-36-34685efc1691> in <module>
10 # Create a new variable called 'time' from the `time_coverage_start` field, and
11 # convert the string to a datetime object so xarray knows it is time data
---> 12 timestep_ds['time'] = datetime.strptime(timestep_ds.time_coverage_start,
13 "%Y-%m-%dT%H:%M:%S.%fZ")
14
~/miniconda3/envs/py3_std_maps/lib/python3.8/site-packages/xarray/core/common.py in __getattr__(self, name)
226 with suppress(KeyError):
227 return source[name]
--> 228 raise AttributeError(
229 "{!r} object has no attribute {!r}".format(type(self).__name__, name)
230 )
AttributeError: 'Dataset' object has no attribute 'time_coverage_start'
輕松修復:使用:
ds = xr.open_mfdataset(file_path_folder...time??/*nc')
時間不是說 2015 年,而是 20 年? 獲取 21 世紀的所有文件,與 19 世紀相同?? 獲取 20 世紀的所有文件等。
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