dictionary.py

#dict : mutable   == >  key value  pair 

"""d1={"phy":85, "maths" :98} 


phy : 85   ==> 1 pair   == > key  phy  value  85 
maths :98  ==> 1 pair   == > key maths  value 98 

print(d1)
print(type(d1))
print(len(d1))
"""
"""d2= {78 : 98 , "com" : 56}
print(d2)
print(type(d2))
"""

# d1 ={"phy" : 98 , "com" :74, "maths" : 23}

"""print(len(d1))
print(min(d1))
print(max(d1))
print(sorted(d1))
"""

#method : 

# d1 ={"phy" : 98 , "com" :74, "maths" : 23,"s.s" :60}

"""d1.clear()
print(d1)"""

"""d2=d1.copy()
print(d2)
"""
#add in to dict  : 
"""
d1["bio"] =85
print(d1)
"""
# print(d1.get("phy"))

# print(d1.keys())
# print(d1.values())
# print(d1.items())

'''l1=["xena","raghav" , "manush"]
d2 =dict.fromkeys(l1,100)
print(d2)
'''

"""
d1.pop("phy")
print(d1)
"""

"""d1.popitem()
print(d1)"""

"""d1.update(d2)
print(d1)"""


"""
task  : 1 
ask user to enter the 5  student name and marks and store in to dict 
output ={"ram" : 85 , "sita" : 25 , "manav" : 65}
"""

#task:
# ask user to enter 5 student name and marks in dict
# task: sort by values


'''d1={}

for i in range (3):
    a= input("enter name of student :")
    b= int(input("enter marks of student:"))
    d1[a]=b
    
print(d1)

d2=sorted(d1.values())
d3={}

for i in d2:
    for a ,b in d1.items():
        if i==b:
            d3.update({a : b})
print(d3)
'''
# task
# Make a Python program to count letters of the word: MISSISSIPPI. 
# Your program should store them in a dictionary as: {"M":1, "I":4, "S":4, "P":2}.
# Next, generalize this program for any word entered by user.

# a="MISSISSIPPI"
'''a=input("enter a word:")
d1={}

for i in a:
    d1[i]=a.count(i)
print(d1)
'''
#task:
# result = {'Science': [88, 89, 62, 95, 50], 'Language': [77, 78, 84, 80, 60], 'Computers': [93, 88, 79, 96, 70]}
# Expected Output: [{'Science': 88, 'Language': 77}, {'Science': 89, 'Language': 78}, {'Science': 62, 'Language': 84}, {'Science': 95, 'Language': 80}]

'''d1={'Science': [88, 89, 62, 95, 50], 'Language': [77, 78, 84, 80, 60], 'Computers': [93, 88, 79, 96, 70]}

'''

#task:
# Write a Python program to drop empty items from a given dictionary.
# Original Dictionary:
# {'c1': 'Red', 'c2': 'Green', 'c3': None}
# New Dictionary after dropping empty items:
# {'c1': 'Red', 'c2': 'Green'}

'''d1={'c1': 'Red', 'c2': 'Green', 'c3': None}
d2={}

for i , j in d1.items():
    if j !=None:
        d2.update({i:j})
print(d2)
'''

#task:
'''Write a Python program to filter a dictionary based on values.
Original Dictionary:
{'Cierra Vega': 175, 'Alden Cantrell': 180, 'Kierra Gentry': 165, 'Pierre Cox': 190}
Marks greater than 170:
{'Cierra Vega': 175, 'Alden Cantrell': 180, 'Pierre Cox': 190}
'''
'''d1={'Cierra Vega': 175, 'Alden Cantrell': 180, 'Kierra Gentry': 165, 'Pierre Cox': 190}
d2={}

for i , j in d1.items():
    if j > 170:
        d2.update({i:j})
print(d2)
'''

#task:
'''Write a Python program to sort Counter by value.
Sample data : {'Math':81, 'Physics':83, 'Chemistry':87}
Expected data: [('Chemistry', 87), ('Physics', 83), ('Math', 81)]
'''

'''d1={'Math':81, 'Physics':83, 'Chemistry':87}
l1=[]
d2=sorted(d1.values())
d3={}

for k in d2:
    for i , j in d1.items():
        if k==j:
            l1.append((i,j))
print(l1[::-1])'''

#task:
'''[('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4), ('red', 1)]
Grouping a sequence of key-value pairs into a dictionary of lists:
{'yellow': [1, 3], 'blue': [2, 4], 'red': [1]}
'''

'''l1 = [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4), ('red', 1)]
l2 = []
d1 = {}

for i,j in l1:
        if i not in d1:
            d1[i] =[]
        d1[i].append(j)
print(d1)
'''

#task:
'''A Python Dictionary contains List as a value. Write a Python program to update the list values in the said dictionary.
Original Dictionary:
{'Math': [88, 89, 90], 'Physics': [92, 94, 89], 'Chemistry': [90, 87, 93]}
Update the list values of the said dictionary:
{'Math': [89, 90, 91], 'Physics': [90, 92, 87], 'Chemistry':[90,87,93]}
'''

'''d1={'Math': [88, 89, 90], 'Physics': [92, 94, 89], 'Chemistry': [90, 87, 93]}

d1['Math'] = [x + 1 for x in d1['Math']]
d1['Physics'] = [x - 2 for x in d1['Physics']]

print(d1)
'''