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

# My First Data Science Project

# Helicopter Escapes!

# We begin by importing some helper functions.

# In[1]:


from helper import * 


# Get the Data

# Now,let's get the data from the [List of helicopter prison escapes](https://en.wikipedia.org/wiki/List_of_helicopter_prison_escapes) Wikipedia article.

# In[2]:


url = 'https://en.wikipedia.org/wiki/List_of_helicopter_prison_escapes'
data = data_from_url(url)


# Let's print the first three rows

# In[3]:


for row in data[:3]:
    print (row)


# In[4]:


index = 0 
for row in data:
    data[index] = row[:-1]
    index += 1
print(data[:3])


# In[5]:


for row in data:
    row[0] = fetch_year(row[0])
print (data[:3])


# In[6]:


min_year = min(data, key=lambda x: x[0])[0]
max_year = max(data, key=lambda x: x[0])[0]
years = []
for y in range(min_year, max_year+1):
    years.append(y)
attempts_per_year = []
for n in years:
    attempts_per_year.append([n,0])

print (attempts_per_year)


# In[7]:


for row in data:
    for ya in attempts_per_year:
        y = ya[0]
        if row[0] == y:
            ya[1] += 1
print(attempts_per_year)


# In[8]:


get_ipython().run_line_magic('matplotlib', 'inline')
barplot(attempts_per_year)


# In which year did the most attempts at breaking out of prison with a helicopter occur?

# In[ ]:


co