String manipulation

Dealing with strings in Python is very simple: you can search, replace, change character case, and perform other manipulations with ease:

To search for a string, you can use the find method like this:

#!/usr/bin/python3
str = "Welcome to Python scripting world"
print(str.find("scripting"))

The string count in Python starts from zero too, so the position of the word scripting is at 18.

You can get a specific substring using square brackets like this:

#!/usr/bin/python3
str = "Welcome to Python scripting world"
print(str[:2]) # Get the first 2 letters (zero based)
print(str[2:]) # Start from the second letter
print(str[3:5]) # from the third to fifth letter
print(str[-1]) # -1 means the last letter if you don't know the length

To replace a string, you can use the replace method like this:

#!/usr/bin/python3
str = "Welcome to Python scripting world" 
str2 = str.replace("Python", "Shell")
print(str2)

To change the character case, you can use upper() and lower() functions:

As you...