[Tutor] Sets PythonTutor Digest, Vol 130, Issue 1

[Dino Bektešević]

Hey,

>        invalidCommands = 0
>        command = ("left", "right", "up", "down")
>        numUnique = 0
>        numInvalid = 0
>        invalidCommands = set()

It seems you have defined invalidCommads as borh of int type and a set
type.

Also a nice trick for multiple options in the future is:
If command is in ("up","down","left","right"):
    print command

Of course thos wont worj now vecause yoy have ti keep track of tge
counters, but I personaly like it and find it usefull.

Good luck,
Dino

> Message: 2
> Date: Mon, 1 Dec 2014 01:01:32 +0000
> From: <niyanaxx95 at gmail.com>
> To: "=?utf-8?Q?tutor at python.org?=" <tutor at python.org>
> Subject: [Tutor] Sets Python
> Message-ID: <547bbf1d.91268c0a.220f.3741 at mx.google.com>
> Content-Type: text/plain; charset="utf-8"
>
> I am not understanding how I am supposed to do the highlighted things on
the problem statement. If someone could please direct me on the steps to go
about doing what is highlighted.  Have do I read each command, by making
the program read each line?? How do I add the invalid commands into a set?
When printing the command is invalid, do I simply do as I did with the
valid commands print?
>
>
> Problem Statement:
> We are going to write a program that reads an input file of commands
(Commands.txt) to Arnold the Robot.
>
> The four valid command are:
>
> Up
>
>
> Down
>
>
> Left
>
>
> Right
>
>
> After you read each command, make sure it is valid (included in the set
of valid commands).
>
> If the command is valid, print ?Valid command entered, the command was:?
and the command.
>
> If the command is invalid, print ?Invalid command entered, the command
was:? and the command.
>
> If the command is invalid, add it to a set of invalid commands.
>
> Keep a count of:
>
> The total number of commands read
>
>
> The total number of valid commands read
>
>
> The total number of invalid commands read
>
>
> After all of the commands have been read:
>
> Print the total number of commands read
>
>
> Print the total number of valid commands read
>
>
> Print the total number of invalid commands read
>
>
> Print the number of unique invalid commands read
>
>
> Print the set of invalid commands.
>
>
> The format of the input files is:
>
> Each line in the file contains a command, not all command are valid
>
>
>
>
>
> My Code So Far:
>
> def main() :
>    # Define main variables
>        leftCount = 0
>        rightCount = 0
>        upCount = 0
>        downCount = 0
>        commandCount = 0
>        invalidCommands = 0
>        command = ("left", "right", "up", "down")
>        numUnique = 0
>        numInvalid = 0
>        invalidCommands = set()
>
>        filename = input("Enter filename (default: Commands.txt): ")
>        if len(filename) == 0 :
>               filename = "Commands.txt"
>        inputFile = open(filename, "r")
>
>
>        command = input("Please enter a command for Arnold: ")
>        if command in command :
>                      commandCount = commandCount + 1
>                      print("The total amount of commands: ", commandCount)
>        if command == "up" :
>                      upCount = upCount + 1
>                      print("Valid command entered, the command was: up")
>        elif command == "down" :
>                      downCount = downCount + 1
>                      print("Valid command entered, the command was: down")
>        elif command == "left" :
>               leftCount = leftCount + 1
>               print("Valid command entered, the command was: left")
>        elif command == "right" :
>               rightCount = rightCount + 1
>               print("Valid command entered, the command was: right")
>        else :
>               print("Invalid command entered, the command entered was: ",
command)
>               numInvalid = numInvalid + 1
>               if not command in invalidCommands :
>                      numUnique = numUnique + 1
>               invalidCommands.add(command)
>
>
>
>
>
>        for line in inputFile :
>               theWords = line.split()
>               for word in theWords :
>                      cleaned = clean(word)
>               if cleaned != "" :
>                      numUnique.append(cleaned)
>        print("The file contains", len(numUnique), "unique words.")
>
>
>
> # Cleans a string by making letters lowercase and removing characters
that are not letters
> #  @param string the string to be cleaned
> #  @return the cleaned string
> def clean(string) :
>        result = ""
>        for char in string :
>               if char.isalpha() :
>                      result = result + char
>                      return result.lower()
>
>
>
>
>
> # Start the program.
> main()
>
>
>
> What Happens When Ran:
>
> 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit
(Intel)]
> Python Type "help", "copyright", "credits" or "license" for more
information.
> [evaluate CommandsDraft.py]
> Enter filename (default: Commands.txt): Commands.txt
> Please enter a command for Arnold: dawn
> The total amount of commands:  1
> Invalid
> Traceback (most recent call last):
>   File "C:\Program Files (x86)\Wing IDE 101
5.0\src\debug\tserver\_sandbox.py", line 70, in <module>
>   File "C:\Program Files (x86)\Wing IDE 101
5.0\src\debug\tserver\_sandbox.py", line 52, in main
> builtins.AttributeError: 'int' object has no attribute 'append'
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