how to pick up first letter from string in python code example

Example 1: parse first characters from string python

# Get First 3 character of a string in python
first_chars = sample_str[0:3] 
print('First 3 characters: ', first_chars)

# Output:
First 3 characters: Hel

Example 2: python get first character of string

string = 'This is a string'
print(string[0])
#output: 'T'