python and web develop

[pythonweb-blog]

The sed command p prints. For example, print lines 3 through 7 of a file: sed -n '3,7p' somefile

[pythonweb-blog]

Show how many times each line in a sorted file is repeated: uniq -c

[pythonweb-blog]

if you have to refer to the documentation of a module, find a new module.

[pythonweb-blog]

list files order by size.

list files order by size.

ls --sort=size -hl 

[pythonweb-blog]

Limit find's depth of search with the -maxdepth option.

[pythonweb-blog]

python -x foo.py will ignore the first line of foo.py. Useful for running scripts on Windows that were written on Unix.

[pythonweb-blog]

Count the number of matches of a regex in each file: grep -c

[pythonweb-blog]

Reverse a 1-D array

import numpy as np a = np.arange(10) print a[::-1]

[pythonweb-blog]

[pythonweb-blog]

Python: How to get UTC time given TIMEZONE

from datetime import datetime

a=datetime.utcnow()+timedelta(hours=-4)

print time.strftime("%m%d%y%H%M",a.timetuple())

Another package to note is 

pytz - World Timezone Definitions for Python¶

[pythonweb-blog]

Backbone.js gives structure to web applications by providing models

Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions,views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface

More: http://backbonejs.org/

[pythonweb-blog]

jTouch- Javascript gesture for Touch Screen

[pythonweb-blog]

A linux command line cheat sheet

[pythonweb-blog]

Suppress file name when searching over multiple files: grep -h

[pythonweb-blog]

convert integer to and from string with radix:

int("60", 7)

[pythonweb-blog]

python rational construction:

python rational construction: 

from fractions import Fraction x = Fraction(22, 7)

[pythonweb-blog]

Change the third 'apple' in each record to 'orange': sed 's/apple/orange/3' somefile