#
#  Simple python random walk in 1D
#
import random
import numpy as np
import matplotlib.pyplot as plt
random.seed(None)        # Seed generator, None => system clock

def random_walk(steps):
    """  Performs 1D random walk with number steps = steps """
#######################################################
#   YOUR CODE GOES HERE: complete this function
#   Hint: walk is a list that starts with value 0
#
#######################################################
    return walk

#  Perform random walk
num_steps = 1000
walk = random_walk(num_steps)
#
# Plot graph of random walk 
#
#####################################################
#   YOUR CODE GOES HERE:
#    Graph value (x) versus step number  
#    Title is 'One-dimensional random walk'
######################################################
#