http://github.com/Russell91/pythonpy now supports windows

Installation

pip install pythonwpy

wpy "expression" ≅ python -c "print(expression)"

Float Arithmetic

$ wpy "3 * 1.5"
4.5

Access imports directly

$ wpy "math.exp(1)"
2.71828182846

$ wpy "random.random()"
0.103173957713

$ wpy "datetime.datetime.now?"
Help on built-in function now:

now(...)
      [tz] -> new datetime with tz's local day and time.

Lists are printed row by row

$ wpy "range(3)"
0
1
2

$ wpy "[range(3)]"
[0, 1, 2]

wpy -x "foo(x)" will apply foo to each line of input

Multiply each line of input by 7.

$ wpy "range(3)" | wpy -x "int(x)*7"
0
7
14

Append ".txt" to each line of input

$ wpy "range(3)" | wpy -x "x + '.txt'"
0.txt
1.txt
2.txt

Append ".txt" to every file in the directory

$ ls | wpy -x "'mv `%s` `%s.txt`' % (x,x)" | sh
# sharp quotes are swapped out for single quotes
# single quotes handle spaces in filenames

Get only even numbers

$ wpy "range(8)" | wpy -x "x if int(x)%2 == 0 else None"
0
2
4
6

wpy -fx "predicate(x)" filters rows satisfying a condition

Get only odd numbers

$ wpy "range(8)" | wpy -fx "int(x)%2 == 1"
1
3
5
7

wpy -l will set l = list(sys.stdin)

Reverse the input

$ wpy "range(3)" | wpy -l "l[::-1]"
2
1
0

Sum the input

$ wpy "range(3)" | wpy -l "sum(int(x) for x in l)"
3

Count the lines of input

$ wpy "range(17)" | wpy -l "len(l)"
17

If you haven't had enough yet, check out the wiki