#  created : 20250111

#  https://www.scientecheasy.com/2022/09/reserved-keywords-in-python.html/

#  class Keyword

#  example for a class declarstion 

class ClassExample:
    def func1(parameters):
        . . . .
    def func2(parameters):
        . . . .

with open('myfile.txt', 'w') as file:
    file.write('Hi jerin!')

#  as Keyword

import math as x

print(x.cos(0))

1.0

#  pass keyword

def func():
    pass
class A:
    pass

#  lambda Keyword

cube = lambda x: x * x * x
print(cube(7))

343

#  import Keyword

import math

print(math.sqrt(25))

5.0

#  from Keyword

from math import sqrt

print(sqrt(625))

25.0

#  del Keyword

my_var1 = 200
my_var2 = "Scientech Easy"

print(my_var1)
print(my_var2)

200
Scientech Easy

del my_var1
del my_var2

print(my_var1)
print(my_var2)

---------------------------------------------------------------------------

NameError                                 Traceback (most recent call last)

Cell In[25], line 1
----> 1 print(my_var1)
      2 print(my_var2)


NameError: name 'my_var1' is not defined

# global Keyword

g_var = 50
def func_read():
    print(g_var)
def func_write():
    global g_var
    g_var = 100

func_read()
func_write()
func_read()

50
100

#  nonlocal Keyword

def outer_func():
    x = 50
    def inner_func():
        nonlocal x
        x = 100
        print("Inner function: ",x)
    inner_func()
    print("Outer function: ",x)

outer_func()

Inner function:  100
Outer function:  100

def outer_func():
    x = 50
    def inner_func():
        x = 100
        print("Inner function: ",x)
    inner_func()
    print("Outer function: ",x)

outer_func()

Inner function:  100
Outer function:  50