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Class 41 — December 7

I know that you know that

Programming basics — You achieved this semester — Bask in the success

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Look both ways

• Back or ahead

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Artistry

• The TAs have spoken

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Links

• Test 1 artifacts are available

• Test 2 artifacts are available

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Agenda

• Be chrestohistorical

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Thanks to the undergraduate TAs for making the course successful

•   Daniel Choi	•  Ann Hoang	•  Leah Salvano
•  Jessica Emmons	•  Adriece Sharpe	•  Simone Olson
•  Ryan Green	•  Jessica Krynitsky	•  Jacob St. Martin
•  Nadia Hassan	•  Nikki Pope	•  Alexandra Stampfl
•  Blake Hesson

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Want to be a CS 1112 TA in the spring

• Please fill out the departmental application

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Important patterns

• Print output

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• Get input

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• Convert input to data

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• Perform calculations

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• Process strings

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• Get web input

• Use to do above and below tasks

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• Examine and create lists

• Convert a string into a list of strings

• Convert a list of strings into a list of numbers

• Perform an accumulation

• Build a string, list, or sum

• Check to see if the elements of the list are all of the same form

• Check to see if any element of the list has a desired form.

• Find first / last index of an item with a property

• Compare two lists

• Synthesize two lists

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• Generate random data

• Get a random value from a range

• Select a random element from a list

• Produce a random tuple

• Produce random lists and tables

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• CSV data

• Convert a list of CSV-strings into a new list of lists

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• Examine and create dictionaries

• Convert a list of tuples into a dictionary

• Convert a list of two-element lists into a dictionary

• Examine a list with respect to a dictionary

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• Examine a table

• Perform an accumulation

• Process a table on a row by row basis

• Convert cells from strings to numerics

• Check to see if all data cells in the table are of the same form

• Check to see if any data cells in the table are of the desired form

• Check to see if all rows in the table are of the same form

• Check to see if any rows in the table are of the desired form

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• Design, implement, analyze functions that can encapsulate the above tasks

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• Photo manipulation

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Realizations

• A variable has an identity and a type

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• The value of a variable indicates where the object which it represents can be found

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• Strings are immutable

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• Converting string data to numeric data.

• To hand back a single integer value nbr from a single numeric representation v

nbr = int( v )

• To hand back a list of integer values nbrs from a string list strings

nbrs = []

for v in s :

  nbr = int( v )

  nbrs.append( nbr )

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• A function invocation cannot change the identity of an argument

• All functions return a value either explicitly or implicitly. If there is no explicit return, None is returned.

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Truisms

• The test will cummulative.

• The test points are likely to be ~135.

• Questions can require in part familiarity with

• Fundamental types; e.g., int, float, and str

• Arithmetic operators; e.g., +, -, *, **, /, //, and %

• Identifiers, keywords, variables, objects, values, and references

• Logical and relational operators; and, or, not, ==, !=, <, >, <=, and >=

• Control constructs; e.g., if, for, and while

• Nested for constructs

• Random value manipulation

• random.seed()

• random.randrange()

• random.choice()

• Builtin-in functions; e.g., print(), input(), int(), float(), str(), max(), min(), len(), type(), and id()

• URLs and web files; e.g., numeric, text and CSV contents

• Ranges

• Data structures and their use: list, dict, tuples, methods and slicing

• Functions, parameters, definitions, and invocations

• Colors and PIL Image

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Final thought

• I say thanks to you — Your presence is a great gift — Brings me happiness

 

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© 2019 Jim Cohoon

Resources from previous semesters are available.