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

# # My First Data Science Project

# ## Helicopter Escapes!

# We begin by importing some helper functions.

# In[29]:


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[30]:


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


# Let's print the first three rows

# In[31]:


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


# ## Removing the Details

# In[34]:


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


# ## Extracting the Year

# In[35]:


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


# ## Attempts per Year I

# In[39]:


min_year = min(data, key=lambda x: x[0])[0]
max_year = max(data, key=lambda x: x[0])[0]
print(min_year)
print(max_year)


# In[42]:


years = []
for y in range(min_year, max_year + 1):
    years.append(y)
print(years)


# In[54]:


attempts_per_year = []
for y in years:
    attempts_per_year.append([y, 0])
print(attempts_per_year)


# ## Attempts per Year II

# In[55]:


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


# ## Attempts per Year III

# In[57]:


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? 1986, 2001, 2007, and 2009.

# ## Attempts by Country

# In[58]:


countries_frequency = df["Country"].value_counts()
print_pretty_table(countries_frequency)


# In which countries do the most attempted helicopter prison escapes occur? France