EGR 103/Concept List Fall 2019

This page will be used to keep track of the commands and major concepts for each lab in EGR 103.

Lectures

Lecture 1 - Introduction

• Class web page: EGR 103L; assignments, contact info, readings, etc - see slides on Errata/Notes page
• Sakai page: Sakai 103L page; grades, surveys and tests, some assignment submissions
• Piazza page: Piazza 103L page; message board for questions

Lecture 2 - Programs and Programming

• To play with Python:
  • Install it on your machine or a public machine: Download
• Quick tour of Python
  • Editing window, variable explorer, and console
  • Variable explorer is your friend
• From Dewey - programming language typically have ability to work with input, output, math, conditional execution, and repetition
• Hilton and Bracy Seven Steps
• Class work developing algorithm for program to determine if a number is prime
• Inputs in Python using input() command - always grab strings
• Convert strings containing integer characters to integers using int()
• Some commands are only available by importing from modules; import numpy as np will bring in all the functions of the numpy module. Access these commands by typing np.VALUE or np.FUNCTION (for example, np.pi or np.cos(2))

Lecture 3

• Python has several different variable types, each with their own purpose and operators.
• Main ones this lecture: int, float, string, tuple, list.

Lecture 4

• Brief discussion of disctionaries, how to build, and how to access.
• Two main types of function - lambda functions and defined functions
• Lambda functions are one line of code; can have multiple inputs but only one expression.
  • c = lambda a,b: np.sqrt(a**2 + b**2)
• Defined functions can be multiple lines of code and have multiple outputs.
  • Four different types of inputs -

Lecture 5

• Creating formatted strings using {} and .format() (format strings, standard format specifiers -- focus was on using e or f for type, minimumwidth.precision, and possibly a + in front to force printing + for positive numbers.
• Basics of decisions using if...elif...else
• Basics of loops using for and while
• Building a program to count the number of numbers, vowels, consonants, and other characters in a phrase

# letter_counter.py from class:

def counter(phrase):
    counts = [0, 0, 0, 0]
    nums = "0123456789"
    vowels = "aeiou"
    cons = "bcdfghjklmnpqrstvwxyz"

    for k in phrase.lower():
        #print(k)
        if k in nums:
            # print('{:s} is a number!'.format(k))
            counts[0] += 1
        elif k in vowels:
            counts[1] += 1
        elif k in cons:
            counts[2] += 1
        else:
            counts[3] += 1
               
    return counts
        
c = counter("Hello! Go 2022! East Campus Rocks!")
print(c)