Task 1

The following is my execution of the len function

11.1: len.py

  text = "Believe it or not this is a string"
print("Enter the text: " + text)

length = len(text)

print("Your text has " + str(length) + " characters.")

  

Output

  >>> Enter the text: Believe it or not this is a string
>>> Your text has 34 characters.
  

Task 2

I also managed to convert a piece of text to be uppercase.

11.2: upper.py

  # The text without any numbers or symbols
text = "hello"

output = text.upper()

print(output)

# The text with additional numbers and symbols
text = "123hello&&#$("

output = text.upper()

print(output)

  

Output

  >>> HELLO
>>> 123HELLO&&#$(
  

As you can see above I also tested with alphanumeric characters and symbols. This was my conclusion.

The numbers and symbols stay the same but the alphabetic characters are made uppercase

What follows is a completed table of methods and outputs

Method	Inputs	Outputs
lower	"Hello", "HELLO"	"hello", "hello"
capitalize	"Hello", "HELLO"	"HELLO", "HELLO"
islower	"hello", "HELLO", "Hello"	true, false, false
isalpha	"Hello", "Hello1", "111"	true, false, false

Task 3

The following is the output of my slicing tests

Function	Result
print(text[4])	o
print(text[-3])	r
print(text[2:7])	llo W
print(text[3:])	lo World
print(text[:4])	Hell
print(text[1:-2])	ello Wor
print(text[2:-5])	llo
print(text[:-1])	Hello worl

The program I used to get this table is as follows

Source: 11.3 slicing.py

text = "Hello World"

print(text[4])
print(text[-3])
print(text[2:7])
print(text[3:])
print(text[:4])
print(text[1:-2])
print(text[2:-5])
print(text[:-1])

Then I also tested left select, right select and half functions.

11.3: half.py

  string = "Believe it or not this is a string"
print("Enter a string: " + string)

print(string[-int(len(string) / 2):])

  

Output

  >>> Enter a string: Believe it or not this is a string
>>>  this is a string
  

11.3: left

  from sys import argv


def parse_int_or(string: str, otherwise: int):
    try:
        return int(string)
    except ValueError:
        return otherwise


string = "Believe it or not this is a string"
print("Enter a string: " + string)
chars = parse_int_or(argv.pop(), 69)

print(string[:chars])

  

Output

  >>> Enter a string: Believe it or not this is a string
>>> Believe it or not this is a string
  

11.3: right

  from sys import argv


def parse_int_or(string: str, otherwise: int):
    try:
        return int(string)
    except ValueError:
        return otherwise


string = "Believe it or not this is a string"
print("Enter a string: " + string)
chars = parse_int_or(argv.pop(), 69)
end_chars = -chars

print(string[:chars])

  

Output

  >>> Enter a string: Believe it or not this is a string
>>> Believe it or not this is a string
  

Task 4

Input	Output
apple	0
pear	2
lemon	-1
banana	1
GRAPE	-1

The program I used to get the above table is as follows

11.4: searching.py

  text = "Believe it or not this is a string"
print("Enter the text: " + text)

final = text.rfind("a")
count = text.count("a")
maximum = max(text)
minimum = min(text)
numeric = text.isnumeric()

print('Final:', final)
print('Count:', count)
print('Maximum:', maximum)
print('Minimum:', minimum)
print('Numeric:', numeric)

  

Output

  >>> Enter the text: Believe it or not this is a string
>>> Final: 26
>>> Count: 1
>>> Maximum: v
>>> Minimum:  
>>> Numeric: False