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

# # Tuples
# <a href="https://colab.research.google.com/github/rambasnet/FDSPython-Notebooks/blob/master/Ch07-Tuples.ipynb" target="_parent"><img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/></a>
# 
# - http://openbookproject.net/thinkcs/python/english3e/tuples.html
# - containers used for grouping data values surrounded with parenthesis
# - data values in tuples are called elements/items/members
# - two major operations done with tuples are:
#     1. packing (creating tuples)
#     2. unpacking (storing data into individual variables)

# In[1]:


year_born = ("Paris Hilton", 1981) # tuple packing


# In[2]:


print(year_born)


# In[11]:


star = "Paris", 'J', 'Hilton', 1981, 32, 1.2 # tuple packing


# In[12]:


star


# In[13]:


type(star)


# In[14]:


# tuple assignment
fname, mi, lname, year, age, income = star # tuple unpacking; 
# no. of variables must match no. tuple values


# In[9]:


fname


# In[10]:


lname


# In[11]:


print(income)


# In[12]:


# swap values of two variables
a = 100
b = 200
a, b = b, a


# In[13]:


print(a, b)


# ## Member access
# - each member of tuple can be accessed using [ index ] operator
# - index is 0 based or starts from 0

# In[1]:


name = ('John', 'A.', 'Smith')


# In[3]:


print(name[0], name[1], name[2])


# ## len built-in function
# - gives the length (no. of elements) of tuple

# In[4]:


len(name)


# ## Tuple membership
# - **in** and **not in** boolean operators let's you check for membership

# In[7]:


'John' in name


# In[8]:


'B.' in name


# In[9]:


'Jake' not in name


# ## Tuples can be returned from a function

# In[29]:


def maxAndMin(a, b, c, d, e):
    myMax = a #max(a, b, c, d, e)
    if myMax < b:
        myMax = b
    if myMax < c:
        myMax = c
    if myMax < d:
        myMax = d
    if myMax < e:
        myMax = e
    values = [a, b, c, d, e]
    myMin = min(values)
    return (myMax, myMin)
    


# In[30]:


ab = maxAndMin(10, 20, 5, 100, 34)
print('max =', ab[0], 'min=', ab[1])


# ## Tuples are immutable
# - can't change tuple in-place or update its elements similar to string

# In[5]:


a = (1, 2, 3)
print(a[0])


# In[6]:


a[0] = 100