Converting from Networkx to Python-Igraph

example.py

import networkx as nx
Gnx = nx.path_graph(4) # Create a random NX graph
nx.write_graphml(G,'graph.graphml') # Export NX graph to file

import igraph as ig
Gix = ig.read('graph.graphml',format="graphml") # Create new IG graph from file

Most straigt-forward method in my experience: simply write your graph to a file, then read it back.

So stupid. What happens when the graph has millions of nodes, this would take quite a lot of time in that case

@parth-verma thank you for such a nice comment!
In my experience of working with the kind of volume you mention, that's quicker and requires less RAM than other methods I tried. But please feel free to share a better way to do this.

I applied your solution, and it looks like igraph currently do not support GraphML. Please check the below error.

---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-2-0d19e71fcb45> in <module>
----> 1 G = ig.read('thesaurus_com_syn_graph_maincomponent.graphml',format="graphml")

~\anaconda3\lib\site-packages\igraph\__init__.py in read(filename, *args, **kwds)
   4771     @param filename: the name of the file to be loaded
   4772     """
-> 4773     return Graph.Read(filename, *args, **kwds)
   4774 load=read
   4775 

~\anaconda3\lib\site-packages\igraph\__init__.py in Read(klass, f, format, *args, **kwds)
   2621             raise IOError("no reader method for file format: %s" % str(format))
   2622         reader = getattr(klass, reader)
-> 2623         return reader(f, *args, **kwds)
   2624     Load = Read
   2625 

NotImplementedError: Error at c:\users\vssadministrator\appdata\local\temp\pip-req-build-f_aw61lh\vendor\build\igraph\igraph-0.8.3-msvc\src\foreign-graphml.c:1446: GraphML support is disabled, Unimplemented function call

@thepunitsingh igraph lib might have evolved a bit since I published this gist. Check the docs: https://igraph.org/python/doc/igraph.GraphBase-class.html#Read_GraphML

Great! Your solution help me! Thank!