List of Python Keywords

List of Python Programming Keywords

Like other programming languages for Python has got certain reserved words, which can not be used as variable names.

The most important Python keywords are the following.

and	FALSE	nonlocal
as	finally	not
assert	for	or
break	from	pass
class	global	raise
continue	if	return
def	import	TRUE
del	in	try
elif	is	while
else	lambda	with
except	None	yield

Let's continue to learn more in detail about keywords and their uses.

Keyword     |  Description                            | Code example

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False,True   Data values from the data type Boolean   False == ( 5 > 3 )

                                                       True == ( 20 > 10 )

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and,or,not   Logical operators: 

              (x and y) → both x and y must be True    x, y = True , False

              (x or y) → either x or y must be True    (x or y) == True # True

                                                       (x and y) == False # True

              ( not x) → x must be false               (not y) == True # True

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break        Ends loop                                while ( True ):     

                                                       break # no infinite loop

                                                       print( "hello world" )

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continue     Finishes current loop                    while ( True ):

                                                       continue

                                                       print( "83" ) # dead code

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class       to create a class                         class: person:

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def         Defines a new function or                 def my_function():

             class method.                     print("Hello from a function")

                                                       my_function()

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if           Conditional program                      x = 12

                                                       if x > 10:

                                                       print("YES")

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elif         Conditional program                      x = 12

                                                     if x > 10:

                                                     print("YES")

                                                    else:

                                                     print("No")

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else         Conditional program                      if x > 25 : 

                                                        print( "Big" )

                                                       elif x == 25 : 

                                                        print( "Medium" )

                                                       else : 

                                                        print( "Small" )

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for        create a for loop.                    for i in [ 0 , 1 , 2 ]:

                                                         print(i)        

                                                

while      create a while loop.                    j=0

                                                        while j<3:

                                                        print(j)

                                                        j=j+1;

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in        Checks whether element is       mobile=["Nokia", "Apple","Samsung"]

           in sequence                         if "Apple" in mobile:

                                                print("Yes")

                                               for x in mobile:

                                                print(x)

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is        Checks whether both             x=y=["Nokia", "Apple","Samsung"]

           element point to the                   print(x is y) #True

             same object                 y = "Apple"

                                                print(x is y) #False

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None       Empty value constant         def f () :

                                             x = 2

                                            f() is None # True

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 lambda     Function with no name             (lambda x: x + 3)(3)

            (anonymous)                            #returns value 6

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return

Terminates function execution and passes the execution flow to the caller. 

An optional value after the return keyword specifies the result.

    def incrementor (x) : #incrementor is function here

        return x + 1

        incrementor( 4 ) # returns 5

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