# how to clear all elements in dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
student.clear()
print(student)

# How to copy a dictionary?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
student2 = student.copy()
print(student2)

# How to creat dictionary using keys and values
keys = ("name", "age", "subjects")
value = 1
student = dict()
newDict = student.fromkeys(keys,value)
print(newDict)

# What is the use of get method in dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}

print(student["nae"])

# result = student.get("nae")
result = student.get("ddd","1")
print(result)

# How to get all itams from dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
items = student.items()
print(items)
for item in student.items():
    print(item[1])

# How to get all keys from dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
keys = student.keys()
print(keys)
for key in keys:
    print(key)

# How to remove get random element in dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"], "roll":8}
result = student.popitem()
print('pop item',result)
print(student)

# How to set default value if key not available
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
print(student["rank"])

student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
print(student)
result = student.setdefault("ranks")
print(student)

# How to remove element based on key in dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
result = student.pop("marks")
print(result)

# How to get all values from dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
result = student.values()
print(result)
for value in student.values():
    print(value)

# How to update the dictionaries in dict?
student = {"name":"ram","marks":[200, 300, 250], "subjects":["maths", "physics", "chemisrty", "social"]}
student2 = {"name":"krish","marks":[233, 333, 222], "rank":2}
student.update(student2)
print(student)