The phrase


for line in data:
...


assigns the variable "line" to each interated string terminated by '\n' within the data.

So if you inserted the statement

Search this forum for Vega's decimal to binary converter. Your code is reading the data correctly; now you just have to find the right way to display it.

Jeff

Interesting concept. Two potential problems:

(1) What if the images are not all the same size?

(2) How does the code decide what framerate to use?

Jeff

Mark as solved and give Bear of NH props. :)

Jeff

That's cool. I didn't even know there was a PySerial module.

First, the error messages are confusing. Are those the result of the print motor.read(motor.InWaiting()) command?

Second, just to...

Lists of lists work fine as container arrays (not mathematical arrays, but you don't seem to be wanting that). So:


nlat=10
mylist = []

for x in range(0,nlat):
tmp = []

for y in...

I really like the text we used for my high-school level class: Python Programming for the Absolute Beginner. Two caveats -- it's game-oriented, and it doesn't use Python 3.0.

That said, it...

One more thought: lists of lists in Python function reasonably well as arrays:


mylist = [[1,2,3],[4,5,6],[7,8,9]]

print mylist[0][2]
3


I say "reasonably well" -- there aren't any linear...

>>> class Thing(object):
pass

>>> t = Thing()
>>> dir(t)
['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__',...

Can't speak to IPython, but a simple file copy will solve the first problem.

Two thoughts.

(1) You're writing code as if it were C or Pascal. A better way is to write a class:


class Bird(object):

def __init__(self, nID=0, ter=0, year=0, fled=0, age=0.0):
...

This appears to work:

>>> im = Image.open("24bit test.bmp")
>>> im2 = im.convert("P")
>>> im2.save("256bit test.bmp")

The bit-depth of the output file is 8, so I assume that's what you were...

Or this:


try:
val = int(item)
if val > 0:
do stuff for positive numbers
elif val < 0:
do stuff for negative numbers
else: # don't omit zero!

Good news: the convention for scientific notation

2.72e-2 (which is the correct rendering)

is so well-recognized that superscripting is not required.

Jeff

Well, that question may not have an answer if the values are not unique; for example, if

book['key1'] = {'keya':valuea, 'keyb':valueb}

and

book['key2'] = {'keya':valuec, 'keyd':valued}
...

Absolutely. You need ... dictionaries.


store_dict = {}
f1 = open("ITEMS.txt")
for line in f1:
store, item = line.strip("/n").split(" ")
store_dict[store] = item
f1.close()

Yes, the standard way of writing a shell (which is what you are doing) is like this:


while True:
inputline = raw_input(myprompt)
parse inputline into command, operands
if command...

OK, wait. In your source code directory, you have

myprog.pyw
myprog.pyc

Yes?

What happens if you double-click "myprog.pyw"?

That code won't work. Here's why:

"or" doesn't mean "one of these" in Python, or any other computing language. Instead, "or" means "True if one or both operands is True; False if both are...

Two things:

(1) I can double-click on your program and get a nice little Hello, World window, along with the command-prompt window. Do you get something else?

(2) If you manually rename the...

OK, so give an idea of what the tag looks like, and we might be able to help.

Jeff

Actually, it probably does something and then closes the window immediately -- which means you can't see it!

Try this:


print "Hello, World"
raw_input("Press <Enter> to exit.")


If you...

well, you might consider the BeautifulSoup module.

link:

http://www.crummy.com/software/BeautifulSoup/

It has the capability to extract tags and values relatively easily.

Jeff

It can be due to any exception whatsoever. To find out, you'll need to isolate the offending lines.

I often run my code through IDLE, which prints exceptions. There might be another solution...

There's a second way to think about this as well, and it's well adapted to real-time operating systems (read: robotics).

Suppose you have a speaker object, a listener object, and a thinker object...

what about


class MySpeechParser(...):
self.topic = "Dinosaurs"
sentence = self.GetSentence()
topic = self.DiscernTopic(sentence)
if topic != self.topic:
...

Look for a delimiter between the rows and .count() them.

Jeff

Instead of debugging, if it's OK, I'll talk about *how* to debug.

Since the error is coming from line 42 (line 31 in the code above), insert a print statement just prior to line 31:


...
pile...

Here's one possibility:


def get_four(mylist, index):
retval = ""
for i in range(index, min(index+4, len(mylist))):
retval += str(mylist[i])+"\t"
return retval

def...

So you want something like this (formatting not to scale!):


Prime Non-prime
2 3 5 7 1 4 6 8
11 13 17 19 9 10 12 14


?

Hm. I wonder if it's the same one I've used, which is a wrapper for pygame that works reasonably well; it's out of the Dawson book "Python Prog. for the Absolute Beginner."

Jeff

What's the issue with livewires?

Jeff

I think you want a dictionary, if I understand correctly. The dictionary is the standard way of mapping one set of items to another.

So you have

mydict = {URL1: 13, URL2: 0, URL3: 3, URL4: 2,...

I would do this:

print hour + ":" + minute

The , character in a print statement means "print on the same line and insert a space."

By contrast, the + operator on strings joins them together...

Check out the eval() function.

Jeff

Yes, yes, and yes. Welcome to the freedom of Python. :)

First of all, as is typical for Python, there is a module called time (and another one, datetime) that does exactly this stuff...

Hi. A couple of suggestions.

(1) (minor) mydict2 should be generated dynamically from mydict1 so that if you ever decide to change mydict1, it will automagically change along with it.

Here's...

I've never used VPython, but the documentation looks accessible. Can you post your code?

Jeff

It is a bit tricky. Can you explain the problem more precisely? For example, what do each of the fields in the string

"1lghB H i 71.9 H H -19.94"

mean?

Jeff

I'm guessing that what you want is an event loop:


while True:
check for events
respond to events


and then all of your many while loops could be separate events. What do you have...