1. Tyler thinks about a problem (Yahtzee, etc.)

2. Na Li stores info in a file (Python)


f = open("log.txt", "w")
while True:
    line = raw_input("Enter>")
    if line == "bye":
        break
    f.write(line + "\n")
f.close()

f = open("log.txt", "r")
lines = f.readlines()
for line in lines:
    print line,
f.close()

These are actually two programs. 

What if the file needs to be opened/closed inside the while?

3. Aaron: game of craps, extension

#!/usr/bin/python
  
import cgi, random

print "Content-type: text/html\n\n"

data = cgi.FieldStorage()

if data.has_key("numbers"):
  a = data["numbers"].value
  a = a.split(",")
else:
  a = []

if len(a) > 0:
  random.shuffle(a)
else:
  a = [3, 2, 4, 4, 1, 5, 2, 3]

for i in range(len(a)):
  a[i] = str(a[i])

a = ",".join(a)

print """
<form>
  Here's your array: %s <p>
  Press <input type=submit name=action value=Proceed> to move on.
  <input type=hidden name=numbers value="%s">
</form>
""" % (a, a)

  I implemented this as silo.cs.indiana.edu:8346/cgi-bin/aaron

  Program needs to be tested from command line too: ./aaron

Q: Can you split an array of numbers? 

A: You can split a string -- is that what you want to do to the array too? 

Q: Ah, no. No problem. But, what does this do:

a = "1,2,3,4,5"
b = a.split(",")

What is b?

A: An array of strings.

Q: OK, so that's what I really wanted. Can you split a string into an
array of ints?

A: Not in one step, but you can get there in two-three steps.

Q: So now can you join an array of ints? 

A: Who splits and joins? 

Q: Strings. 

A: So a string like "2,3,4,5,6" can split. It splits into an array of ints.

Q: Okay, who joins then? 

A: Strings, you said. 

Q: So to join I choose the glue and the glue joins: " ".join(a)? 

A: Yes, and if a is not an array of strings it doesn't work. 

Q: I see...

5. Beibit: step one, working on dark hearts. 

6. Na Li web script prototype phase one: 

-bash-3.2$ pwd
/u/dgerman/apache/cgi-bin
-bash-3.2$ cat nali
#!/usr/bin/python

print "Content-type: text/html\n\n"

import cgi

data = cgi.FieldStorage()

comment = ""
if data.has_key("comment"): comment = data["comment"].value

f = open("/u/dgerman/apache/htdocs/log.txt", "w")

f.write(comment)

f.close()

print """
  <form>
    Enter comment: <input type=text name=comment> <p> 

    Press <input type=submit value="this button"> to submit it. 

  </form> 
"""
-bash-3.2$