Bytes - answers

Error msg "NameError: global name 'atomName' is not defined" when calling class fnct.

jorgejch — Thu, 19 Nov 2009 00:51:56 GMT

Hello, I've started with python (3) recently. Initialy only for scripting. Now I'm trying the object oriented bit.

I'm getting the following error message

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Traceback (most recent call last):

  File "./Main.py", line 7, in 

    print (t.getAtomName())

  File "/home/jorge/Documentos/projetos/mestrado/c�digos/cartesian_zmatrix/Atom.py", line 22, in getAtomName

    return atomName

NameError: global name 'atomName' is not defined

when calling the function 'getAtomName()' of the 'Atom' class. This class is on the file Atom.py on the same directory as the test code.

below is my test code and Atom class code:

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	 #! /usr/bin/python3
 
from Atom import *
 
t = Atom("C",12)

print (t.getAtomName())

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class Atom:
 
    cartesian = dict()

    bondList = list()

    atomName = str()

    atomicNum = int()
 
    def __init__(self,name, atNum):

        self.atomName = name

        self.atomicNum = atNum
 
    def setCoordinates(x, y, z):

        catesian['x'] = x

        catesian['y'] = y

        catesian['z'] = z
 
    def addBondedAtom(Atom):

        bondList.append(Atom)
 
    def getAtomName():

        return atomName

    def getAtomicNumber():

        return atomicNum

    def getBondList():

        return bondList

    def getCartesian():

        return cartesian

I appreciate any help, and also any tip you might have considering I've just started with python.

Abra�o,
Jorge

Issue reading data lines multiple times from a file

rka77 — Wed, 18 Nov 2009 20:58:26 GMT

Hi,
I am trying to make a Python2.6 script on a Win32 that will read all the text files stored in a directory and print only the lines containing actual data. A sample file -
Set : 1
Date: 10212009
12 34 56
25 67 90
End Set
********
Set: 2
Date: 10222009
34 56 89
25 67 89
End Set

In the above example file, I want to print only the lines 3, 4 and 9, 10 (the actual data values). The program does this iteratively on all txt files.
I wrote the script as below and am testing it on a single txt file as I go.
My logic is to read the input files one by one and search for a start string. As soon as the match is found, start searching for end string. when both are found, print the lines from start string to end string.Repeat on the rest of the file before opening another file.
The problem I am having is that it successfully reads the Set 1 of data, but then screws up on subsequent sets in the file. For set 2, it identifies the no. of lines to read, but prints them starting at incorrect line number.
A little digging leads to following explanations -
1. Using seek and tell to reposition the 2nd iteration of the loop, which did not work since the file is read from buffer and that screws up "tell" value.
2. Opening the file in binary mode helped someone, but it is not working for me.
3. Open the file with 0 buffer mode, but it did not work.

Second problem I am having is when it prints data from Set 1, it inserts a blank line between 2 lines of data values. How can I get rid of it?

Note: Ignore all references to next_run in the code below. I was trying it out for repositioning line read. Subsequent searches for start string should begin from the last position of end string

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	#!C:/Python26 python
 
# Import necessary modules

import os, glob, string, sys, fileinput, linecache

from goto import goto, label
 
# Set working path

path = 'C:\\System_Data'
 
# --------------------

# PARSE DATA MODULE

# --------------------
 
# Define the search strings for data

start_search = "Set :"

end_search ="End Set"

# For Loop to read the input txt files one by one

for inputfile in glob.glob( os.path.join( path, '*.txt' ) ):

  inputfile_fileHandle = open ( inputfile, 'rb', 0 )

  print( "Current file being read: " +inputfile )

  # start_line initializes to first line

  start_line = 0

  # After first set of data is extracted, next_run will store the position to read the rest of the file

  # next_run = 0

  # start reading the input files, one line by one line

  for line in inputfile:

    line = inputfile_fileHandle.readline()

    start_line += 1

    # next_run+=1

    # If a line matched with the start_search string

    has_match = line.find( start_search )

    if has_match >= 0:

      print ( "Start String found at line number: %d" %( start_line ) )

      # Store the location where the search will be restarted

      # next_run = inputfile_fileHandle.tell() #inputfile_fileHandle.lineno()

      print ("Current Position: %d" % next_run)

      end_line = start_line

      print ( "Start_Line: %d" %start_line )

      print ( "End_Line: %d" %end_line )

      #print(line)

      for line in inputfile:

        line = inputfile_fileHandle.readline()

        #print (line)

        end_line += 1

        has_match = line.find(end_search)

        if has_match >= 0:

          print 'End   String found at line number: %d' % (end_line)

          # total lines to print:

          k=0

          # for loop to print all the lines from start string to end string

          for j in range(0,end_line-start_line-1):

            print linecache.getline(inputfile, start_line +1+ j )

            k+=1

          print ( "Number of lines Printed: %d " %k )

          # Using goto to get out of 2 loops at once

          goto .re_search_start_string

    label .re_search_start_string

    #inputfile_fileHandle.seek(next_run,0)
 
  inputfile_fileHandle.close ()

Circle loop

OzzyB — Tue, 17 Nov 2009 06:48:03 GMT

This is another problem in the Zelle book.

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def drawCircle(win, centre, radius, colour):

    circle = Circle(radius)

    circle.setFill(colour)

    circle.setWidth(2)

    circle.draw(win)
 
def eyes(row, columns):

    win = GraphWin()

    drawCircle(win, centre, 50, "white")

    drawCircle(win, centre, 25, "blue")

    drawCircle(win, centre, 10, "black")

How do I loop this code so that when I call the function eyes(2,4) it outputs 8 eyes on the graphic window for example

OOOO
OOOO

Please help me find a sloution.

Loop Question

OzzyB — Mon, 16 Nov 2009 16:17:16 GMT

I am writing a function that has two parameters F & L and the function returns the sum of the squares of all the intergers between F & L

e.g if i call def sum(3,5) should output 50 (9 + 16 + 25)

def sum(first,last):
sqaure = 0
for i in range(first,last + 1)

this is my program code at the moment what am I missing?

Search function not working.

thesinik — Fri, 13 Nov 2009 18:01:00 GMT

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	import random

import math
 
t = tuple()
 
def linsearch(key, l):

    count = 0

    index = 0

    t = tuple()

    for i in l:

        count += 1

        if key == i:

            t = (index, count)

            return t

        index += 1
 
def binsearch(key, l):

    count = 0

    low = 0

    t = tuple()

    high = len(l) - 1

    while low < high:

        count += 1

        mid = (low + high) / 2  

        if l[mid] < key:

            low = mid + 1

        elif low < len(l) and l[low] == key:

            t = (low, count)

        else:

            high = mid

        return t
 
def mean(l):

    s = 0.0

    for i in l:

        s += i

    return s // len(l)
 
def sdev(l):

    s = 0.0

    for i in l:

        s += i**2

    return math.sqrt((s // len(l)) - mean(l)**2)
 
def median(l):

    if len(l) % 2 == 0:

        return (l[len(l) // 2] + l[(len(l) // 2) - 1]) // 2.0

    else:

        return l[len(l) // 2]
 
listlen = int(raw_input("List length: "))

testlen = int(raw_input("Test length: "))

maxval = int(raw_input("Maximum value: "))
 
comlinsort = []

combinsort = []

comlinunsort = []

combinunsort = []

comlinreverse = []

combinreverse = []
 
for i in range(listlen):

    list = []

    key = random.randint(1, maxval)

    for j in range(listlen):

        x = random.randint(1, maxval)

        list.append(x)

    t = linsearch(key, list)

    comlinunsort.append(t[1])

    list.sort()

    t = linsearch(key, list)

    comlinsort.append(t[1])

    t = binsearch(key, list)

    combinsort.append(t[1])

    list.sort(reverse=True)

    t = linsearch(key, list)

    comlinreverse.append(t[1])

    t = binsearch(key, list)

    combinreverse.append(t[1])

..is my code. I want to read the input for the list length, the number of items to search and the max value. Then sort a random list, reverse it, and do a linear search (store it in a tuple) and a binary search (also store in a tuple). Then I want statistics (the reason for mean, standard deviation, median definitions) for the comparison counts.

I keep getting this error:

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	Traceback (most recent call last):

   File "assign7.py", line 72, in 

      comlinunsort.append(t[1])

TypeError: 'NoneType' object is unsubscriptable

My code is nearly complete, but I think the issue is with the placement of the returns. I've been messing around with it but I can't figure it out. If I move the returns out an indent, I get an error saying the tuple is out of range. Help would be greatly appreciated :D thanks.

How do i write the code for this

anderson1373 — Fri, 13 Nov 2009 01:23:25 GMT

I want to write a program that will prompt the user for a number, its base, and the base to which it should be converted. I want the program yo convert the number and display an appropriate comment with the resulting number. The number entered will be either an integer or real number.

The conversion process is from source base to decimal, then from decimal to the target base. For nonterminating conversions, I only need five places after the decimal.

Fetch log message from cvs using python scripts

chitras1984 — Thu, 12 Nov 2009 16:37:46 GMT

Hi

Could anyone help to get the log message using the python script

And to stop the commit when the log message is empty

Thanks
Chitra

Wildcard Strings in Path

Apros — Wed, 11 Nov 2009 17:52:53 GMT

Okay, this is what I need to do, and I keep getting confused.
I need to remove all files in a folder, then delete the folder, it's part of an installer I'm making, and it creates a directory, I just don't know how to delete it. This is what I have right now:
curDir = os.getcwd()
os.remove(os.path.join(curDir, *)
So it will remove all the files in the directory it is in. How do I use the wildcard to make it all files in the directory? And then how do I delete the directory?
Also, how would I copy the script to another location?

Any help would be much appreciated!

send the gps data to pc through gprs

chiranjeevi50 — Wed, 11 Nov 2009 11:55:04 GMT

Hi
I am trying to develope a gps device with GM862-GPS module.I am not much aware of python.I want to send the data to the PC through gprs.What i have to do for this initially.Any thing i need at the system side to recieve the data.

Memory Error that ocures only in the windows server 2003 operating system.

taleden — Wed, 11 Nov 2009 09:36:27 GMT

Hi,
- I'm trying to load a large file (about 300MB) using pickle.load().
- The file contains a PyMl classifier object
- When I load the file on my PC it works fine (with an XP operating system).
- When I load the file on a remote computer with a windows server 2003 operating system I get a memory error.

Anyone has any idea how to fix this?

Thx,
Tal.

Convert binary real number to decimal - I need help.

anderson1373 — Wed, 11 Nov 2009 03:36:12 GMT

Create a Python program that will convert a binary real number entered by a user to its decimal equivalent. For those conversions that may produce a non-terminating fraction, ten (10) places is sufficient accuracy.

This is the process I need to use but I don't know how to do the code.

Convert integer part
to integer type
Multiply left most digit
of integer by 2
Add next digit of integer
Stop multiplying and adding
when you get to ones col.
Separate string into
fraction and integer
Convert fraction part
to float type
Divide rightmost digit
by 1/2
Add next digit to the left
Stop dividing and adding
when you get to the period

How can I write a maze solver for this maze?

Findlebot — Tue, 10 Nov 2009 22:16:44 GMT

I am trying to write a maze solver for the following maze in the attached text file.

I want to open the file as a list in python and then write an algorithm to solve it, any help is much appreciated as I am still new to programming.

being that I am new I really only know how to open the file, here is the code I have so far:

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	def main():

    mazefile = open("pythonmaze.txt","r")

    pythonmaze =  mazefile.read()

    print pythonmaze

    mazefile.close

main()

where do I go from here?

Attached Files

pythonmaze.txt (218 Bytes)

sudoku solver problem

Ri0o — Sat, 07 Nov 2009 18:52:29 GMT

hi, i have to make a sudoku solver using python quickdraw,
i've started on it and this is what i got so far
here is the link to the assignment
http://pages.cpsc.ucalgary.ca/~zongpeng/CPSC231/assignments/A4/a4.pdf

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	def solveRows():

    """eliminates solved numbers by row"""

    for x in range(0, 81, 9):

        row = puzzle[x : x+9]#loops through each row

        for space in row: #loops through each space

            if len(space) == 1: #space is solved

                for space2 in row: #loops through spaces again

                    if len(space2) != 1: #space isnt already solved

                        if space[0] in space2: #the solved number is a possibility

                            del space2[space2.index(space[0])] #deletes the number as a possiblbitly                

def solveColumns():

    """eliminates solved numbers by column"""

    rows = []#splits up the puzzle into rows

    for x in range(0, 81, 9):

        rows.append(puzzle[x:x+9])

    for n in range(0, 9):

        column = [x[n] for x in rows] #loops through each column

        #the next part is taken from solveRows()

        for space in column: #loops through each space

            if len(space) == 1: #space is solved

                for space2 in column: #loops through spaces again

                    if len(space2) != 1: #space isnt already solved

                        if space[0] in space2: #the solved number is a possibility

                            del space2[space2.index(space[0])] #deletes the number as a possiblbitly
 
def solveBoxes():

    """eliminates solved numbers by box"""

    rows = []#splits up the puzzle into rows

    for x in range(0, 81, 9):

        rows.append(puzzle[x:x+9])

    #this next part just splits the puzzle into boxes

    for x in range(0, 9, 3):

        for y in range(0, 9, 3):

            tempRows = rows[x:x+3]

            tempBox = [row[y:y+3] for row in tempRows]

            #the next part just formats the box

            #basically it was a list of lists of lists

            #and i need it as a list of lists

            box = []

            for row in tempBox:

                for space in row:

                    box.append(space)

            #the next part is taken from solveRows()

            for space in box: #loops through each space

                if len(space) == 1: #space is solved

                    for space2 in box: #loops through spaces again

                        if len(space2) != 1: #space isnt already solved

                            if space[0] in space2: #the solved number is a possibility

                                del space2[space2.index(space[0])] #deletes the number as a possiblbitly
 
def isSolved():

    """Checks to see if the puzzle is solved"""

    for x in puzzle:

        if len(x) != 1:

            return False

    else:

        return True
 
def main():

    while True:

        temp = puzzle #used to see when puzzle is solved

        solveBoxes()

        solveRows()

        solveColumns()

        if isSolved():#puzzle is solved

            return
 
def display():

    """ displays the puzzle"""

    copy = puzzle #copy of the puzzle

    copy = map(str, [x[0] for x in copy]) #makes the ints strs so i can use S.join()

    #next part just displays the puzzle all nice and pretty

    for x in range(0, 9):

        print ', '.join(copy[x:x+9])
 
def getInput():

    """gets a puzzle to be solved from the user"""

    puzzle = []

    for x in range(1, 10): #1 for each line of the puzzle

        puzzle.append(raw_input('enter one line of the puzzle '))

    puzStr = '\n'.join(puzzle)

    puzzle = []#a soon to be matrix holding possibilities for each space

    for letter in puzStr:

        if letter == 'x':

            puzzle.append(range(1, 10)) #adds all possibilities if square is blank

        elif letter == '\n' or letter ==' ':

            continue

        else:

            puzzle.append([int(letter)]) #adds the already given number

    return puzzle
 
print """This program will solve some suDoku puzzles

If it can't it will just hang indefinately so give it a little

while then if nothing happens assume that either you entered

the puzzle incorrectly, it is not solvable, or this program

can't solve it.
 
Begin by entering the puzzle in line by line.

Represent empty spaces by an 'x'. So a line

migh look like '6x12x897x'. This program as of now

will not catch your errors so try not to make mistakes.

You can but do not have to add any spaces when entering the puzzle.
 
Enjoy!

"""

puzzle = getInput()

main()

print 'The answer is:'

print

display()

don't know what to do next,i'[ve tried putting like
6x12x897x, x8x6x5x2x, x54xxxxx1, 4xx796xxx, x9xxxxx1x
xxx182xx7, 3xxxxx75x, x7x3x9x4x, x285x41x3
didn't work and it said errno #22 close failed
so, am i doing the assignment right
any help pls

I'm having problems with py2exe

josh001 — Sat, 07 Nov 2009 02:51:35 GMT

Hey, in an earlier question I asked why gui2exe wasn't working.
Since then I've tried a couple of things but haven't found out much. Only that the problem has something to do with the sets module which py2exe is accessing.

I tried,

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import py2exe

and got,

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	Warning (from warnings module):

  File "C:\Program Files\Python25\lib\site-packages\py2exe\build_exe.py", line 16

    import sets

DeprecationWarning: the sets module is deprecated

Then I tried,

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import sets

and got,

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	Warning (from warnings module):

  File "__main__", line 1

DeprecationWarning: the sets module is deprecated

But when I looked at the code for the sets module, I couldn't figure out what was wrong. (what does python mean by deprecated, by the way?)

If anyone knows why this is happening, I really appreciate it.

Joshua

Python dictionaries from .txt

timinator18 — Fri, 06 Nov 2009 23:12:23 GMT

Function Name Description
load_airports(reader)
Given an open reader that contains airport data in the format described above this table, return a tuple that contains two dictionaries and a list.

The first dictionary should contain three-letter airport codes (of type str) as keys and tuples with two elements as values. Each tuple should contain the city the airport is associated with (str) as the first value and a tuple containing its latitude (float) and longitude (float) as the second value.

The latitude and longitude tuple should be obtained by providing the name of the airport followed by the word CANADA to the geocode function of the maps module. If the maps module cannot provide the latitude and longitude of the airport, the airport should not be placed in this dictionary.

The second dictionary should also use three-letter airport codes as keys. An airport should only be represented in this dictionary if it has US or international flights. If an airport has US flights (but no international flights), its value in the dictionary should be the str "US". If it has international flights, its value should be the str "INT". Again, if the maps module cannot provide the latitude and longitude of the airport, the airport should not be placed in this dictionary.

The list should contain the three-letter codes of all airports that the geocode function (which uses Google's geocoding service) cannot locate.

airport info is located here. its supposed to be part of a .txt file called small_airports.txt

DEER LAKE:YDF:DEER LAKE
EDMONTON INTERNATIONAL:YEG:EDMONTON:US
FREDERICTON:YFC:FREDERICTON
HALIFAX INTERNATIONAL:YHZ:HALIFAX:INT
MONTREAL INTERNATIONAL MIRABEL:YMX:MONTREAL:INT
OLD CROW:YOC:OLD CROW
WINDSOR:YQG:WINDSOR
REGINA INTERNATIONAL:YQR:REGINA:US
THUNDER BAY:YQT:THUNDER BAY
VANCOUVER INTERNATIONAL:YVR:VANCOUVER:INT
MONT JOLI:YYY:MONT JOLI
LESTER B PEARSON INTERNATIONAL:YYZ:TORONTO:INT

My question is the following: How do i take this .txt file, split the parts, and put these separate elements into the appropriate lists and dictionaries, etc. The latitude and Longitude tuple can't be completed unless you have the program for it, so dont worry about that part. Thanks a bunch!