Category: Python

Sometimes, we want to convert an integer to string in Python.

In this article, we’ll look at how to convert an integer to string in Python.

How to convert an integer to string in Python?

To convert an integer to string in Python, we can use the str function.

For instance, we write:

num =  str(10)
print(num)

We call str with the number we want to convert to a string.

And the string version of the number is returned.

Then num is '10'.

Conclusion

To convert an integer to string in Python, we can use the str function.

Sometimes, we want to reverse a string in Python.

In this article, we’ll look at how to reverse a string in Python.

How to reverse a string in Python?

To reverse a string in Python, we can put [::-1] after the string.

For instance, we write:

rev = 'hello world'[::-1]
print(rev)

We use -1 with no start and end indexes to reverse the string.

Therefore, rev is 'dlrow olleh'.

Conclusion

To reverse a string in Python, we can put [::-1] after the string.

Sometimes, we want to check if a string is empty with Python.

In this article, we’ll look at how to check if a string is empty with Python.

How to check if a string is empty with Python?

To check if a string is empty with Python, we can use the not operator.

For instance, we write:

some_string = ''
if not some_string:
    print('string is empty')

We put not before some_string to check if it’s empty.

We can do this since an empty string is falsy.

Therefore, 'string is empty' should be printed.

Conclusion

To check if a string is empty with Python, we can use the not operator.

Sometimes, we want to get the class name of an instance with Python.

In this article, we’ll look at how to get the class name of an instance with Python.

How to get the class name of an instance with Python?

To get the class name of an instance with Python, we can use the type function and the __name__ property.

For instance, we write:

class A:
    def whoami(self):
        print(type(self).__name__)


a = A()
a.whoami()

We create the A class with the whoami method that prints the class name by printing type(self).__name__.

Therefore, we should see 'A' printed when we create a new A instance and assign it to a and then call a.whoami.

Conclusion

To get the class name of an instance with Python, we can use the type function and the __name__ property.

Sometimes, we want to measure elapsed time in Python.

In this article, we’ll look at how to measure elapsed time in Python.

How to measure elapsed time in Python?

To measure elapsed time in Python, we can use the time module.

For instance, we write:

import time

start = time.time()
print("hello world")
end = time.time()
print(end - start)

We call time.time to return the current time as a Unix timestamp and assign the result to start and end.

And then we subtract end from start to get the elapsed time in seconds.

Conclusion

To measure elapsed time in Python, we can use the time module.