Keywords are special or we can say reserved words of any particular language. These words have special meaning and functionalities in the programming language in which they belong. In other words, we can say these are the words who are designed to perform the special task. These words can not be used to perform any other task other than they are designed to perform. Every programming language has its own keywords. Therefore, Python programming language has also some keywords which we called them Python keywords.
Here we will see the various python keywords.
Now the question is How many Keywords are there in Python programming language? So, There is a total of 33 keywords in Python. which are:
These are a total of 33 keywords in python. soon we will study each keyword of python with example.
and Keyword in Python
Python and keyword is logical operator in Python. Logical operators are those operators which are used to combine conditional statements.
and keyword is used to check the condition. Let’s understand it by example
Example of Python and keyword: Suppose we have to check whether user can apply for the given job. Job condition is that user age should be greater than or equals to 18 and less than or equal to 30.
age= int (input ("enter age:")) if age>=18 and age<=30: print ("you are eligible to apply") else: print ("You are not eligible")
enter age.:19 you are eligible to apply enter age:12 You are not eligible enter age:32 You are not eligible
In this example, and keyword is used to check the age validation.
as keyword in Python
Python as keyword is used to create an alias (alias means that particular name can be known as some other name). You might alias keyword in some database. Let’s understand as keyword in python with example
Example: our requirement is to print the current date time
We can do this two way
import datetime x = datetime.datetime.now() print(x)
or we can use a keyword as to create alias of datetime.
import datetime as dt x = dt.datetime.now() print(x)
assert keyword in Python
assert keyword is mainly used in debugging. assert is used to test the condition. let’s understand it by taking some example.
assert example in Python
test="Python" assert test=="Python" print("statements after assert keyword")
In above example we have one variable test having value “Python”. With assert keyword we will check whether value is equal to “Python” or not. If it equal to “Python” it will do nothing and control will go to next line. So in this case, program output will be
statements after assert keyword.
Now, suppose assert value is not equal to “Python”, then assert will throw an AssertionError error, and code after AssertionError will not execute.
test="Python" assert test=="hello" print("statements after assert keyword")
Output of this program
assert test=="hello" AssertionError
Clearly, the lines of code will not execute after AssertionError. We can also make AssertionError some user friendly. We can show some message to tester or programmer, see example below
test="Python" assert test=="hello","Values are not same" print("statements after assert keyword")
Here we have written some message that “Values are not same”, so when above program will execute friendly message will come along with AssertionError.
assert test=="hello","Values are not same" AssertionError: Values are not same.
break Keyword in Python
break keyword in Python is used to stop or break the current loop. Let’s understand break keyword in python with example.
Example: Suppose there are 20 numbers, we want to print only 7 number, so when number reach to 7, it breaks the loop and control goes to next line of the code.
for i in range (20): if i &amp;amp;amp;gt; 7: break print(i) print ("out of the loop")
Output will be
0 1 2 3 4 5 6 7 out of the loop
Note: Rest keywords of python will explain soon….