Python part two names and types

Python part two names and types

• 1.
  Python 2 Variables, Assignmentand Types
• 2.
  Personality Tester yournumber =input("Please enter a number between 1 and 99: ") print "You entered " , yournumber print "Performing personality analysis on your number choice …" if yournumber < 49: print "You are truly inadequate" else: print "You have delusions of grandeur" print "That's all folks"
• 3.
  Values • A basicthing – a letter or a number • Values have TYPES • Integers 1, 29485 • Strings “Hello world” • Float – floating point 3.14159
• 4.
  Variables • A variablehas a value mynumber
• 5.
  Variable names • Can’tbegin with a number • Can’t contain spaces or other funnies • Can’t be a keyword – Type help() and press return – Then type keywords in the box.
• 6.
  Assignment Putting a Value‘into’ a Variable • myVariable = 23 • myLongVariable = “Hello how’s it going” Sometimes written with an arrow • myVariable 23 Assignment is really a sort of COPY Why?
• 7.
  Assignment quiz • What’sthe value of myVariable myVariable = 22 mySecondVariable = 13 myVariable = mySecondVariable myVariable = str(myVariable)
• 8.
  Statements • A statementis a piece of code that Python can execute. • Lots of statements make a script • Scripts are the same as programs
• 9.
  Operators • Operators ‘dothings’ to operands • The simplest operators are the math + addition 5+2 - subtraction 5-2 * multiplication 5*2 / division 5/2 ** exponentiation 5**2 % modulo 5%2 Now we can do the first part of the Python Challenge!
• 10.
  A useful program •Write a Fahrenheit to Celsius converter • The formula for the conversion is: F = 1.8 * C + 32 • To make this program work you will need to do the following: Get the user input using input(“your prompt here”) Assign the result to a variable. • That will give you a number, but it will be in a string type. You’ll need to convert it to an integer type using int(variablename). • Now you have an integer, multiply it by 1.8 and add 32 • Print the result – your answer, to the screen with print variablename
• 11.
  Challenge • Write ascript/program that allows you to input two numbers and calculates their: – Product – Sum – Difference – Quotient (one number divided by the other without any remainder) – Remainder (remainder when one is divided by the other) – Exponent (one number to the power of the other)
• 12.
  Challenge 2 • Createan object • Find its type – Print (type(myobject)) • Find its id – Print (id(myobject)) • What is that?