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→PART 2 - Searching and Validating
offset = 0
length = len(text)
while offset < length:
print(offset, text[offset])
offset = offset + 1
if __name__ == '__main__':
s1 = 'Seneca'
print(s1,'contains letter s? ->',find(s1,'s')) print(s1,'contains letter S? ->',find(s1,'S'))
</source> The find() function defined above, is not needed, as it can be replaced by the python keyword '''in''', which can be used as a boolean operator. This boolean operator takes two strings, and return '''True''' if the first appears as a substring in the second.<br/>
'''Create a Python script to validate user input'''
:'''Perform the following instructions'''
:# Create the '''~/ops435/lab4/lab4e.py ''' script. The purpose of this script is to define a function called is_digits(), which takes a string object as its argument and return True if all the characters in the string are all digits, i.e 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9; return False if any one of the characters is not a digit.
:# Use the following template to get started:<source lang="python">
#!/usr/bin/env python3