How to extract the substring between two markers?

In Python, you can use the str.find() method to find the index of the first marker, and the str.rfind() method to find the index of the second marker. Then, you can use string slicing to extract the substring between the two markers. Here's an example:

marker1 = "start"
marker2 = "end"

# The string you want to extract the substring from
string = "This is the start of the substring and this is the end"

# Find the index of the first marker
start = string.find(marker1)

# Find the index of the second marker
end = string.rfind(marker2)

# Use slicing to extract the substring between the markers
substring = string[start+len(marker1):end]

print(substring)
# Output: " of the substring and this is the "

Watch a course Python - The Practical Guide

In this example, the find() method is used to find the index of the first marker "start" in the string, the rfind() method is used to find the index of the second marker "end" in the string, the start+len(marker1) is used to move the index to the next character after the marker1 and the substring is extracted between the start and end index using slicing.