setattr() function in Python use to set the value of an attribute.

setattr() function in Python

 

Syntax : -

setattr(object, name, value)

If you want to read the object then use the getattr() function.

• Parameters For setattr():- 

It takes three parameters and these are:-

• Object : - the object whose value is going to be set in python program.

• Name - set the name of attribute.

• value - Desire value given to the attribute

setattr() function in python doesn't return the value.

Example program for setattr() function in Python

class Person:
    name = 'Adam'
    
p = Person()
print('Before modification:', p.name)

# setting name to 'John'
setattr(p, 'name', 'John')

print('After modification:', p.name)

Output:-

program for setattr() function in Python

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Example Program for vars() function in python - Python Example Program

 vars() function in python return the dictionary attribute of an object.

Example Program for vars() function in python

 

• vars() can just take one object that can be module, class, instance, or any object which  having the __dict__ attribute in python program.

• If the any object passed to vars() function doesn't  have the __dict__ attribute then it give an TypeError exception.

• If any argument doesn't pass to vars() function then it act like an locals() function.

Example Program For vars function in python : -

class Foo:
  def __init__(self, a = 5, b = 10):
    self.a = a
    self.b = b
  
object = Foo()
print(vars(object))

OUTPUT

{'a': 5, 'b': 10}

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Example program for Any function in python - Python Example Program

 Any function in python programming number of iterable is used and return the true if any element of any iterable is true or return the false.

 Any function in python

 

Syntax of any function in python

any(iterable)

Any function in python take iterable (string, dictionary etc.) as a Parameters.

Return : -

it's Return the boolean value.

•  True if any one element is true
  

•  Return the false if all the element are false.
  

Example program for any() function in python : -

l = [1, 3, 4, 0]
print(any(l))

l = [0, False]
print(any(l))

l = [0, False, 5]
print(any(l))

l = []
print(any(l))

True
False
True
False

Example program for any function on Python Strings

s = "This is best"
print(any(s))

# 0 is False
# '0' is True since its a string character
s = '000'
print(any(s))

# False since empty iterable
s = ''
print(any(s))

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Example program for slicing in python - python __slice__

•  slice() function in python is used to sliced a given sequence or given object 
• There are three parameters the first one is an starting point which is optional.
• second parameter for slice function tells about the ending point.
• Third one will tell the increment between each index.

Syntax:- 

slice(start, stop, step)

• Create a slice object for slicing

result1 = slice(3)
print(result1)

)
result2 = slice(1, 5, 2)
print(slice(1, 5, 2))

Example program for slicing

Program for slicing sub-string

py_string = 'Python'

slice_object = slice(3) 
print(py_string[slice_object])  # Pyt

slice_object = slice(1, 6, 2)
print(py_string[slice_object])   # yhn

• Example program for negative slicing in python

py_str = 'Python'


slice_object = slice(-1, -4, -1)

print(py_str[slice_object])   # noh

In this program we use negative value for slicing the object

• Example program for sublist and sub-tuple

py_l = ['P', 'y', 't', 'h', 'o', 'n']
py_t = ('P', 'y', 't', 'h', 'o', 'n')


slice_object = slice(3)
print(py_l[slice_obj]) # ['P', 'y', 't']

slice_object = slice(1, 5, 2)
print(py_t[slice_object]) # ('y', 'h')    

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