sudo pip install pythonpy
$ py '3 * 1.5' # For Windows use: wpy '3 * 1.5'
4.5
$ py '7**3'
343
$ py 'range(3)'
0
1
2
$ py '[x**2 for x in range(1,5)]'
1
4
9
16
$ py 'math.exp(1)'
2.71828182846
$ py 'random.random()'
0.103173957713
Multiply each line of input by 7.
$ py 'range(3)' | py -x 'int(x)*7'
0
7
14
Append ".txt" to each line of input
$ py 'range(3)' | py -x 'x + ".txt"'
0.txt
1.txt
2.txt
Sometimes you want to treat the input as a python list
$ py 'range(4)' | py -l 'l[::-1]'
3
2
1
0
$ py 'range(4)' | py -l 'sum(int(x) for x in l)'
6
$ py 'range(17)' | py -l 'len(l)'
17
Other times you just want to filter out lines from the input
$ py 'range(8)' | py -x 'x if int(x)%2 == 0 else None'
0
2
4
6
The shorthand -fx (filter on x) is also available
$ py 'range(8)' | py -fx 'int(x)%2 == 1'
1
3
5
7
Get words starting with "and"
$ cat /usr/share/dict/words | py -fx 're.match(r"and", x)' | head -5
and
andante
andante's
andantes
andiron
Get verbs starting with ba
$ cat /usr/share/dict/words | py -fx 're.match(r"ba.*ing$", x)' | head -5
baaing
babbling
babying
babysitting
backbiting
$ cat /usr/share/dict/words | py -fx 'x==x[::-1] and len(x) >= 5' | head -5
civic
deified
kayak
level
ma'am
Count words beginning with each letter
$ cat /usr/share/dict/words | py -x 'x[0].lower()' | py -l 'Counter(l).most_common(5)'
('s', 11327)
('c', 9521)
('p', 7659)
('b', 6068)
('m', 5922)
Keep going if some rows raise Errors with (--i).
$ ifconfig | py -x --i 're.search(r"192\.168[\d\.]+", x).group()'
192.168.1.41
If you haven't had enough yet, check out the wiki