import sys
import re
 
class Student:
	def __init__(self,line):
		self.line = line.strip()
		l = self.line.split("\t")
		self.id = l[0]
		self.score = -1.0
	def __str__(self):
		return self.id
 
def saveData(fname,students):
	f = open(fname, 'w')
	for i in students:
		score = 0
		if i.score != -1:
			score = i.score
		i.line += '\t{0}'.format(score)
		f.write(i.line)
		f.write("\n")
	f.close()
 
def inputUntilMatched(prompt, pattern):
	while True:
		s = raw_input(prompt)
		if re.match(pattern, s):
			return s
	return None
 
if len(sys.argv) > 1:
	fname = sys.argv[1]
else:
	print "Unknown data file."
	quit()
 
f = open(fname, 'r')
students = []
for line in f:
	s = Student(line)
	students.append(s)
f.close()
 
for i in students:
	print i
 
while True:
	cmd = raw_input('> ')
	if cmd=='save':
		saveData(fname, students)
		break
	elif cmd=='quit':
		break
	pat = ".*"+cmd+".*"
 
	matched = []
	for s in students:
		if re.match(pat, s.id):
			matched.append(s)
			print "({0}) {1}".format(len(matched),s)
	count = len(matched)
	if count==0:
		print "Not found"
	else:
		while count>1:
			schoice = inputUntilMatched('choice> ', '[0-9]+')
			choice = int(schoice)
			if choice <= count:
				student = matched[choice-1]
				break
			else:
				print "Unknown choice" 
		if count==1:
			student = matched[0]
		sscore = inputUntilMatched('score> ', '[0-9.]+')
		score = float(sscore)
		if student.score != -1:
			print "Replaced!!!"
		student.score = score
		print "Updated {0} to {1}".format(student.id, student.score)

package main
 
import "fmt"
 
var N int = 10
 
func nqueens(board []int, filled int) int {
	var attack bool = false;
	if filled == N-1 {
		for i:=0; i<N; i++ {
			fmt.Printf("%d\t", board[i])
		}
		fmt.Printf("\n");
		return 1
	}
	filled += 1;
	for i:=0; i<N; i++ {
		board[filled] = i;
		attack = false;
		for j:=0; j<filled; j++ {
			dy := board[j]-board[filled];
			dx := j - filled;
			if (board[j] == board[filled]) || 
			(dy/dx == 1 || dy/dx == -1) && (dy%dx == 0) {
				attack = true;
				break
			}
		}		
		if !attack {
			nqueens(board, filled)
		}	
	}
	return 0
}
 
func main() {
	var board []int = make([]int, N);
	nqueens(board, -1);
}

#include<stdio.h>
#include<stdlib.h>
 
const int N=10;
 
int nqueens(int *board, int filled) {
	int i,j,attack,dy,dx;
	if (filled == N-1) {
		for(i=0; i<N; i++)
			printf("%d\t", board[i]);
		printf("\n");
		return 1;
	}
	filled++;
	for(i=0; i<N; i++) {
		board[filled] = i;
		attack = 0;
		for(j=0; j<filled; j++) {
			dy = board[j]-board[filled];
			dx = j - filled;
			if ((board[j] == board[filled]) ||
			((dy/dx == 1 || dy/dx == -1) && (dy%dx == 0))){
				attack = 1;
				break;
			}
		}
		if (!attack)
			nqueens(board, filled);
	}
	return 0;
}
 
main() {
	int *board = (int *)malloc(sizeof(int)*N);
	nqueens(board, -1);
}

def nqueens(board, filled):
	global N
	if filled == N-1:
		for i in board:
			print "%d\t" % board[i],
		print
		return True
	filled+=1
	for i in xrange(0, N):
		board[filled] = i
		attack = False
		for j in xrange(0, filled):
			dy = board[j]-board[filled]
			dx = j - filled
			if board[j] == board[filled] or ((dy/dx == 1 or dy/dx == -1) and dy%dx==0):
				attack = True
				break
		if not attack:
			nqueens(board, filled)
	return 0
N=10
board = [0]*N
nqueens(board, -1)

import csv
data = csv.reader(open('myfile.csv'), delimiter=',', quotechar='"')
for row in data:
	print row[0]

template = """
Dear {r[0]},
 
I would like to send you the following information:
 
{r[1]}
 
Best Regards,
Cholwich
"""

output = template.format(r=row)

import csv
 
template = """
Dear {r[0]},
 
I would like to send you the following information:
 
{r[1]}
 
Best Regards,
Cholwich.
"""
data = csv.reader(open('myfile.csv'), delimiter=',', quotechar='"')
 
for row in data:
	output = template.format(r=row)
	f = open(row[2], 'w')
	f.write(output)
	f.close()