Python Forensics - Indexing

text = 'Python Forensics - indexing'
result = text.index('in')
print("Keyword found at",result)

Keyword found at 19

str.index(sub, start, end)

str1= 'Python is a popular programming language'
res = str1.index('is a')
print("Substring 'is a':", res)

res = str1.index('C++')
print("Substring 'C++':", res)

Substring 'is a': 7
Traceback (most recent call last):
  File "main.py", line 5, in <module>
    res = str1.index('C++')
ValueError: substring not found
ValueError: substring not found

str1= 'Python is a popular programming language'

# Substring is searched in 'a popular programming language'
print(str1.index('ing', 10))

# Substring is searched in 'a popular programming lang '
print(str1.index('g lan', 10, -4))

# Substring is searched in 'programming'
print(str1.index('is', 19, 30))

28
30
Traceback (most recent call last):
  File "main.py", line 10, in <module>
    print(str1.index('is', 19, 30))
ValueError: substring not found

List1 = [999, 'number', 'name', 'pointing'];

print("Index for number: ", List1.index('number'))
print("Index for pointing: ", List1.index('pointing'))

str1 = "integer is a number data type"
str2 = "number";

print ("Index of the keyword found at ", str1.index(str2))

Index for number:  1
Index for pointing:  3
Index of the keyword found at  13