Expected an indented block Exception - csv

Question

After running this code, i get this exception and i didn't found any place to fix it properly
import networkx as nx
from networkx.algorithms import bipartite
import numpy as np
from pandas import DataFrame, concat
import pandas as pd
import matplotlib.pyplot as plt
from scipy.optimize import curve_fit
import ast
import csv
import sys
def plot_degree_dist(G):
in_degrees = G.in_degree()
in_degrees=dict(in_degrees)
in_values = sorted(set(in_degrees.values()))
in_hist = [in_degrees.values().count(x) for x in in_values]
plt.figure()
plt.grid(True)
plt.loglog(in_values, in_hist, 'ro-')
plt.plot(out_values, out_hist, 'bv-')
plt.legend(['In-degree', 'Out-degree'])
plt.xlabel('Degree')
plt.ylabel('Number of nodes')
plt.title('network of places in Cambridge')
#plt.xlim([0, 2*10**2])
I expect to receive a proper graph but all i get is this warning
File "<ipython-input-32-f89b896484d7>", line 2
in_degrees = G.in_degree()
^
IndentationError: expected an indented block

Answer 1

Python relies on proper indentation to identify function blocks. This code should work:
import networkx as nx
from networkx.algorithms import bipartite
import numpy as np
from pandas import DataFrame, concat
import pandas as pd
import matplotlib.pyplot as plt
from scipy.optimize import curve_fit
import ast
import csv
import sys
def plot_degree_dist(G):
in_degrees = G.in_degree()
in_degrees=dict(in_degrees)
in_values = sorted(set(in_degrees.values()))
in_hist = [in_degrees.values().count(x) for x in in_values]
plt.figure()
plt.grid(True)
plt.loglog(in_values, in_hist, 'ro-')
plt.plot(out_values, out_hist, 'bv-')
plt.legend(['In-degree', 'Out-degree'])
plt.xlabel('Degree')
plt.ylabel('Number of nodes')
plt.title('network of places in Cambridge')
#plt.xlim([0, 2*10**2])
Basically just indent it by 2 or 4 spaces as per your style requirements.