Type of object when writing csv in Python

Asked Jun 24 '18 at 17:40

Active Jun 24 '18 at 17:57

Viewed 220 times

I am trying to use igraph to find the optimal number of communities for each nodes and found a good answer here Using iGraph in python for community detection and writing community number for each node to CSV

I tried the code he provided but run into error

TypeError: a bytes-like object is required, not 'str'

Here's the code I used

import igraph
import csv

g = igraph.Graph.Read_Ncol('data.txt')
dendrogram = g.community_edge_betweenness()
clusters = dendrogram.as_clustering()
membership = clusters.membership

writer = csv.writer(open("output.csv", "wb"))
for name, membership in zip(g.vs["name"], membership):
    writer.writerow([name, membership])

edited Jun 24 '18 at 17:57

asked Jun 24 '18 at 17:40

James Xiang

2

Looks like you're trying to write a string into a file opened in `"wb"` mode, which only allows one to write `bytes` into it, not `str`ings. – ForceBru Jun 24 '18 at 17:42
How should I modify it to write `str`ings? – James Xiang Jun 24 '18 at 17:56
2

Open it in 'w' mode. – Paula Thomas Jun 24 '18 at 18:00
1

instead of `writer = csv.writer(open("output.csv", "wb"))`, use `writer = csv.writer(open("output.csv", "w"))`. `w` instead of `wb`. – Martin Jun 24 '18 at 18:00

Type of object when writing csv in Python

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