#!/usr/bin/env python
# coding: utf-8

# In[1]:


import ogr
import gdal
import os

gdal.VersionInfo()


# In[2]:


get_ipython().run_line_magic('cd', 'D:\\\\')


# In[3]:


def getnames(infile):

    layers = []

    ds = ogr.Open(infile)

    for i in range(ds.GetLayerCount()):

        lyr = ds.GetLayer(i)
        layers.append(lyr.GetName())

    ds = None
    
    return layers


# In[4]:


infile = 'doc.kml'
layers = getnames(infile)

print(len(layers))


# In[5]:


outfile1 = 'doc1.geojson'
outfile2 = 'doc2.geojson'

os.path.exists(outfile1), os.path.exists(outfile2)


# ## Doesnt work:

# In[6]:


res = gdal.VectorTranslate(outfile1, infile, format='GeoJSON', accessMode='append', layers=layers, layerName='outlayer')
res


# In[7]:


res = None


# In[8]:


print(ogr.Open(outfile1)) # file is also 'in use' in Explorer, res = None doesnt release handle?

Console shows:
"ERROR 1: GeoJSON parsing error: unexpected end of data (at offset 937626)
ERROR 4: Failed to read GeoJSON data"

Which is the missing ']}' at the end of the file, all features/geometries are in the file.
# ## Works:

# In[9]:


res = gdal.VectorTranslate(outfile2, infile, format='GeoJSON', accessMode='append', layers=layers, layerName='outlayer')
res = None


# In[10]:


print(ogr.Open(outfile2))


# In[ ]: