Posts by valestrom

valestrom 17 Junior Poster in Training

10 Years Ago

Re: Python program only acts on the first line of string?

Wow, that was such a big help. I was thinking of using a for loop but I couldn't find a way to implement it! Now I just have to edit it to work with my other functions and it should do the trick. Thanks so much.

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Re: Python program only acts on the first line of string?

I was hoping to do it all in one function. Is that out of line?

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Python program only acts on the first line of string?

My program is supposed to replace all sets of 4 spaces with a tab but it only seems to be editing the first line then skipping the rest of the lines. "work_string" is defined via another function which takes and saves an entire files input into one string. I just can't get my replacing function to act on multiple lines instead of just the first one.

Here's my replacing function, anyone have an idea of how to get it to act on every line of "work_string"?

def space_to_tab(work_string):
    s_to_tab = 4

    whitespace = work_string[ : len(work_string) - len(work_string.lstrip())]
    whitespace = whitespace.replace(REAL_SPACE * s_to_tab, REAL_TAB)
    whitespace = whitespace.lstrip(REAL_SPACE)
    result = whitespace + (work_string.lstrip())
    return result

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Re: Changing all tabs to spaces line by line

So I have it reading partially now, but it stops after reading a set of lines. The output stops at line 21. Can someone explain this, here's the whole program.

#Name: Nathan Geist
#ID #: *******
#Tut: 06

#Assignment 3
#Code Editing Program:

# 1) Change tabs in the indenting to spaces
# 2) Change spaces in the indenting to tabs
# 3) Substitute spaces, tabs, and newlines for printable characters
# 4) Undo 3
# *Functions will not be used at the same time*
# *Using command line qualifiers to allow user to specify functions to use*
# *Using a (-) sign to introduce a short qualifier*

#Imports
import sys

#Defining Constants
EOF = chr(4) # Standard End of File character
TAB_CHAR = chr(187) # ">>" character used to make tab character visible
SPACE_CHAR = chr(183) # Raised dot used to make space character visible
NEWLINE_CHAR = chr(182) # Backwards p used to make newline character visible

#Input

def get_input():
    """This function works like input() (with no arguments) except that
    instead of throwing an exception when encountering EOF it will return an
    EOF character (char(4))
    Returns: a line of input or EOF if end of file"""

    try:
        ret = input()
    except EOFError:
        ret = ret+EOF
    return ret


#Tabs to spaces
def tab_to_space(file_in):
    """ This function changes tabs in the indenting to spaces
    """
    print("Tabbing spaces")
    output_string = ""

    for line in file_in:
        input_string = get_input()
        input_string = input_string.replace("/t", "    ")
        output_string = output_string+input_string

    return output_string



def help():
    """Prints …

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Re: Changing all tabs to spaces line by line

Oh you know what I called the input statement but I had in fact written my own input statement for the program that tests for EOF.

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Changing all tabs to spaces line by line

Hey, I'm trying to figure out how to get this kind of program to work, it's supposed to be a UNIX style program in the sense that everything is command line driven. What I'm trying to get it to do is when the function is called it takes the input file and converts all tabs into 4 spaces. Here's the form of the input and what I have of my tab_to_space function so far.

"python3 assignment3.py +t < assignment3.py > output.txt"

Where +t denotes the function that is being called

Here is my function so far.

def tab_to_space():
    """ This function changes tabs in the indenting to spaces
    """
    print("Tabbing spaces")
    for TAB_CHAR in input():
        string = input()
        string.replace("   ", "    ")
        return string

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Re: Make a for loop assign different variables?

That sounds so smart, I talked to my prof and he suggested the same kind of thing. Just without hard code in the example. Thanks!

Software Development python

valestrom 17 Junior Poster in Training

10 Years Ago

Make a for loop assign different variables?

print ("The scope of this program is to multiply two matrices together\
and print the result")


while True:
    matrix1_rows = input("How many rows does matrix one have? ")
    matrix1_columns = input("How many columns does matrix one have? ")

    print ("Matrix one is a", matrix1_rows, "x", matrix1_columns, "matrix")
    print()

    matrix2_rows = input("How many rows does matrix two have? ")
    matrix2_columns = input("How many columns does matrix one have? ")

    print ("Matrix two is a", matrix2_rows, "x", matrix2_columns, "matrix")

    if(matrix1_columns != matrix2_rows):
        print("\nSorry, cannot multiply these two matrices, must be (mxn)*(nxp)")


    else:
        break


print("----------------------------------------------------------")
print("\nThe system will now take values for matrix one, one row at a time")
print("Enter the values of the first row, click enter then the second row, and so on")

for i in range (0, int(matrix1_rows)):

        if (i == 0):
            matrix1_row1_set = input("Please enter the values for the row\n")

I want to be able to have the user enter the number of rows that the matrix has and then ask for each rows value (Like user entering "1 0 5 9 5") and assigning that to the variable matrix1_row1_set then getting another row and assigning it to a variable like matrix1_row2_set

What would be the most efficient way to do this?

Software Development python

valestrom 17 Junior Poster in Training

11 Years Ago

Re: Error in beginning android tutorials

Yeah I'm all used to C++/C# error codes which I can more less pick out. Java is a new deal to me.

Mobile Development android-development

valestrom 17 Junior Poster in Training

11 Years Ago

Re: Error in beginning android tutorials

Oh wow. Didn't even make the link. Thanks for the fix!

Mobile Development android-development

valestrom 17 Junior Poster in Training

11 Years Ago

Error in beginning android tutorials

May sound all too easy for some, but I'm just getting started on android development and I can't find out why I got an error when everything is exactly as it is in the tutorial. Weird but I'm confused so I thought I'd post to see if someone can help me out here.

Error is: Gradle: error: cannot find symbol variable container at line (23,30)

MainActivity.Java

package com.example.myfirstapp;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">
    <EditText android:id="@+id/edit_message"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="@string/edit_message" …

Mobile Development android-development

valestrom 17 Junior Poster in Training

12 Years Ago

How to read lines and save to a string?

I'm working on a simple updater program that gets text from a file called version.dv that will always have a number in the form of 1.00, 1.15, 2.00
I can't figure out how to get it to read the file and save the text to a string though. Here's what I have, but I have no idea where to go. If anyone has ideas, I would be in your debt.

 private void button2_Click(object sender, EventArgs e)
        {
            //Open Version.DV
            //Check number (1.00)
            //If number is less, update. If not, switch to play now.

               using (StreamReader sr = new StreamReader("c:\\version.DV")) 
            {
                String line;
                // Read and display lines from the file until the end of 
                // the file is reached.
                while ((line = sr.ReadLine()) != null) 
                {
                    Console.WriteLine(line);
                }
                double linevalue = Convert.ToDouble(line);
                if (linevalue > 3.00)
                {
                    Application.Exit();
                }
                else
                {
                    mainbut.Text = "Play!";
                }
            }
        }

Software Development

valestrom 17 Junior Poster in Training

12 Years Ago

Add an extension to a file at the end of the file name?

Basically what I want to do is when the user browses and finds the file he wants to add the extension to I use a button click to add a .NOPE extension or something like that. I have no idea how to get it to find the end of the text and add that though. Help would be greatly appreciated!

Software Development

valestrom 17 Junior Poster in Training

12 Years Ago

Re: Converting Int to String for use in Textbox - CLI

It is probably a simply typo. The string conversion produces a .NET string of type System::String^, not a C++ string of type std::string. If you use the lower-case name string, my guess is that it refers to std::string, which is not the same as System::String^. This should work:

System::String^ makebreak1 = makebreak.ToString();

If you want a C++ string, then you will have to marshal the .NET String.

Absolutely beautiful. Thanks mike, and everyone else who contributed as well! Helping me understand more and more.