Pythonpy 是命令行的瑞士軍刀，個頭雖小，但功能強大。

Installation

sudo pip install pythonpy

restart your shell for tab completion to take effect</pre> 
py 'expression' ? python -c 'print(expression)'
Float Arithmetic

$ py '3 * 1.5'
4.5
 
Access imports directly

$ py 'math.exp(1)'
2.71828182846

$ py 'random.random()'
0.103173957713
$ py 'datetime.datetime.now?'
Help on built-in function now:
now(...)
      [tz] -> new datetime with tz's local day and time.</pre> 
Lists are printed row by row

$ py 'range(3)'
0
1
2

$ py '[range(3)]'
[0, 1, 2]</pre> 
py -x 'foo(x)' will apply foo to each line of input

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"'
1.txt
2.txt
3.txt
 
Append ".txt" to every file in the directory

$ ls | py -x '"mv %s %s.txt" % (x,x)' | sh
 
Get only even numbers

$ py 'range(8)' | py -x 'x if int(x)%2 == 0 else None'
0
2
4
6
 
py -fx 'predicate(x)' filters rows satisfying a condition

Get only odd numbers

$ 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
 
Get long palindromes

$ cat /usr/share/dict/words | py -fx 'x==x[::-1] and len(x) >= 5' | head -5
civic
deified
kayak
level
ma'am
 
py -l will set l = list(sys.stdin)

Reverse the input

$ py 'range(3)' | py -l 'l[::-1]'
2
1
0
 
Sum the input

$ py 'range(3)' | py -l 'sum(int(x) for x in l)'
3
 
Count the lines of input

$ py 'range(17)' | py -l 'len(l)'
17
 
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)
 
項目主頁：http://www.baiduhome.net/lib/view/home/1407818760942