A Physicist Turns the City Into an Equation

via nytimes.com

Posted via email from sente's posterous

Louis Slotin - Wikipedia, the free encyclopedia

via en.wikipedia.org

The criticality accident

Posted via email from sente's posterous

oswalk

import sys
import os
import os.path

def walk_tree(path):
# print path
for rt, ds, fs in os.walk(path):
for f in fs:
fn = os.path.join(rt, f)
if os.path.isfile(fn):
# yield os.getmtime(fn), fn
yield os.path.basename(fn), os.path.getsize(fn), os.path.getmtime(fn),fn

def walk_dirs(path):
for rt, ds, fs in os.walk(path):
for d in ds:
# print d
dn = os.path.join(rt, d)
if os.path.isdir(dn):
yield dn
# yield os.getmtime(fn), fn
# yield os.path.basename(fn), os.path.getsize(fn), os.path.getmtime(fn),fn




#print sys.argv[1:]




def listing(path):
childs=[os.path.join(path,x) for x in os.listdir(path)]
dirs=[x for x in childs if os.path.isdir(x)]
# dirs=walk_dirs(path)
for d in dirs:
# print d
# print "======================================"
# print d
total=sum([x[1] for x in walk_tree(d)])
yield path,os.path.dirname(d),d,total


# yield path,os.path.dirname(d),d,total

from operator import itemgetter, attrgetter

ss=sorted(listing(sys.argv[1]),reverse=True,key=itemgetter(3))

for s in ss[:4]:
print "\t".join([str(s)])
# raw_input();
##for param in sys.argv[1:]:
## print param
## foo=listing(param)
##
## print "========="
##
## bigdirsize={}
## smalldirsize={}
## for f in foo:
## print f
## if f[0] in bigdirsize:
## bigdirsize[f[0]] += f[3]
## else:
## bigdirsize[f[0]] = f[3]
## if f[0] in smalldirsize:
## smalldirsize[f[1]] += f[3]
## else:
## smalldirsize[f[1]] = f[3]
##
## for b in bigdirsize.keys():
## print b,bigdirsize[b]
## print "=========="
### for b in smalldirsize.keys():
### print b,smalldirsize[b]
##
#asdf=raw_input()
#print "asdf"
#
#
#
##def keyfunc(x):
## return x[0]
#
#from itertools import groupby
#
#groups = []
#uniquekeys = []
#totalsize={}
##data = sorted(foo, key=keyfunc)
#for k, g in groupby(foo, lambda (x): x[0]):
# groups.append(list(g)) # Store group iterator as a list
# uniquekeys.append(k)
#
#
#for g in groups:
# total=0.1
# name=0.0
# for gg in g:
# name=gg[0]
# total+=gg[2]
# foo=[]
# for gg in g:
# foo.append([int(100 * gg[2]/total),gg[2]/1024/1024,gg[0],gg[1]])
#
# s=sorted(foo,reverse=True)
# perc=0
# for element in s:
# perc+=element[0]
# print "\t".join([str(x) for x in element])
# if perc > 80 or element[0]<5: break
# print
## print s
#
#
## print gg[0],
## print gg
## print "\n\n"
## print name,total
#
##for k in uniquekeys:
## print k
#
##for g in groups:
## print "----------------------"
## print g[0][0],
## print sum([x[2] for x in g ])
### print len(g)
## for item in groups:
## print item
##for u in uniquekeys:
## print u
#
#
#
#
## foo=raw_input()
## for f in walk_tree(d):
## print f,
## print walk_tree(d)
##x=walk_tree(sys.argv[1:][0])
##for y in x:
## print y
##for x in walk_tree(sys.argv[1:]):
## print x[0],x[1]

pmail

import sys, smtplib

fromaddr = raw_input("From: ")
toaddrs = raw_input("To: ").split(',')
print "Enter message, end with ^D:"
msg = ''
while True:
line = sys.stdin.readline()
if not line:
break
msg += line

# The actual mail send
server = smtplib.SMTP('localhost')
server.sendmail(fromaddr, toaddrs, msg)
server.quit()

mbox_from

import mailbox
import email

mbox = mailbox.PortableUnixMailbox(open(filename, 'rU'), email.message_from_file)

for msg in mbox:
from = msg['From']
print from

columnate

#!/usr/bin/awk -f

BEGIN{FS="\t";}

{
line[NR] = $0 # saves the line
for (f=1; f<=NF; f++) {
len = length($f)
if (len>max[f])
max[f] = len # an array of maximum field widths
}
}

END {
for(nr=1; nr<=NR; nr++) {
nf = split(line[nr], fields)
for (f=1; f printf "%-*s", max[f]+2, fields[f]
print fields[f] # the last field need not be padded
}
}

sidebyside

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comp_dirs

#!/bin/sh
#originally yoinked from #awk

#remove the trailing /'s

#while test $# -gt 0; do

case $1 in
--command | --cmd | --c | -c | -cmd )
shift
CMD=$1
# printf "%q " $1
# CMD="$VAR"
shift
;;
esac



one=$1
two=$2

echo "----------"
printf -v VAR "%q " $CMD
echo "----------"

dir1="${one/%\//}"
dir2="${two/%\//}"

echo "cmd=$CMD"
echo "vvv=$VAR"
echo "dir1=$dir1"
echo "dir2=$dir2"

TEMPDIR=${HOME}/tmp

FOO=$(cd ${dir1} && $CMD)
BAR=$(cd ${dir2} && $CMD)

seperator=":===============:"

echo "$FOO" > ${TEMPDIR}/foo.txt
echo "$BAR" > ${TEMPDIR}/bar.txt

#/* /^$seperator$/ {dir++; next}; */
echo -en "$seperator\n$FOO\n$seperator\n$BAR\n" > ${TEMPDIR}/foobar.txt

echo -en "$seperator\n$FOO\n$seperator\n$BAR\n" | awk -v "dir1_n=$dir1" -v "dir2_n=$dir2" -v "seperator=$seperator" '
$0 == seperator {dir++; next};
/^$/ {next};
1==dir{dir1[$0]++; next};
2==dir{dir2[$0]++; next};

END{
fmt = "%s\t%s\n";
printf fmt, dir1_n "/:", dir2_n "/:";
for (i in dir1) if (i in dir2) {delete dir1[i]; delete dir2[i]; printf fmt, i, i}
else {printf fmt, i, ""};
for (i in dir2) printf fmt, "", i}'

pkginfo

#!/bin/sh
# stuart powers

# list the files installed from a specific package or all
# packages which match /pattern/ # one line of output per file:
# [exe|dir|pipe|etc] $PACKAGE $FILE

#to see all the executable files from libwww-perl:
#stu@sente ~ $ pkginfo.sh libwww-perl | grep ^x | cut -f3
# /usr/bin/lwp-download
# /usr/bin/lwp-mirror
# /usr/bin/lwp-rget
# /usr/bin/lwp-request
# /usr/bin/GET
# /usr/bin/POST
# /usr/bin/HEAD

#list installed apache packages:
#stu@sente ~ $ pkginfo.sh apache | cut -f2 | uniq
# apache2
# apache2-utils
# apache2.2-common
# libapache2-reload-perl

#show which packages have the most executables:
#stu@sente ~ $ pkginfo.sh | grep ^x | cut -f2 | uniq -c | sort -nr |head -5
# 131 git-core
# 96 coreutils
# 87 mailman
# 82 hal
# 70 texlive-base-bin


parm=$1
test -z $1 && parm=.



dpkg --list |
grep '^ii' |
grep -E "$parm" |
awk '{print $2}' |
while read package; do
dpkg -L $package |
while read file; do

#skips directories -- we only want files
# test -f "$file" || continue;

#if the file is executable, 'x', else 'f'
dest=
flag=

if [ -d "$file" ]; then
flag="dir"
elif [ -x "$file" ]; then
flag="exe"
fi

if [ -L "$file" ];
then flag="lnk"
fi;

if [ -L "$file" ];
then flag="lnk"
dest=$(readlink -e "$file")
fi;

if [ -L "$file" ];
then flag="pipe"
fi;

echo -e "$flag\t$package\t$file\t$dest";
done;
done

pylons

# run these commands to install/configure/test a pylons app
# test the app by going to http://localhost:5000

virtualenv --no-site-packages pyenv_quickwiki
. ./pyenv_quickwiki/bin/activate
easy_install Distribute
easy_install pip
pip install QuickWiki
paster make-config QuickWiki test.ini
paster setup-app test.ini
paster serve test.ini