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

# #The difference between <code><span style="color:green">is</span></code> and <code><span style="color:green">==</span></code>.

# When programmng, you will often want to compare things. However, the behaviour of the python interpreter doesn't always meet expectations.

# In[1]:


x = 5


# In[2]:


y = 5


# In[3]:


x == 5


# In[4]:


x is y


# In[5]:


a = [0, 1, 2]


# In[6]:


b = [0, 1, 2]


# In[7]:


a == b


# In[8]:


a is b


# In[11]:


b = a
print(a)
print(b)


# In[12]:


a == b


# In[13]:


a is b


# In[14]:


a[0] = 100


# In[16]:


print(b[0])


# In[17]:


b = a[:]


# In[18]:


b == a


# In[19]:


b is a


# In[23]:


x = 1e5
print(x)


# In[24]:


y = x


# In[25]:


x == y


# In[26]:


x is y


# In[27]:


x += 1


# In[30]:


print(x)
print(y)


# In[31]:


x is y


# In[32]:


x == y


# In[34]:


x = 1000
y = 1000


# In[35]:


x == y


# In[36]:


x is y


# In[37]:


y = int(y)


# In[38]:


x == y


# In[39]:


x is y


# In[41]:


x = 5.0


# In[43]:


y = 5


# In[44]:


x == y


# In[45]:


x is y


# Source: http://stackoverflow.com/questions/132988/is-there-a-difference-between-and-is-in-python