pythonpy

UPDATE 20220225: Please consider using https://github.com/edk0/spy/ instead, as it seems much better maintained, organized, and all-around like a better choice than using this probject.

Forked from MatthieuBizien/pythonpy

$ pipx install git+https://github.com/n8henrie/pythonpy
$ echo foo | py -x 'print(x + "bar")'
foobar
$ echo -e '1\n2\n3' | py -l 'sum(map(int, l))'
6

Makes for much easier piping. Comparison with python3 -c:

$ echo -n foo | py -x 'x'
foo
$ echo -n foo | python3 -c 'import sys; x=sys.stdin.read(); print(x)'
foo
$ echo -ne '1\n2\n3' | py -l 'sum(map(int, l))'
6
$ echo -ne '1\n2\n3' | python3 -c 'import sys; l=[line.strip() for line in sys.stdin.readlines()]; print(sum(map(int, l)))'
6

Float Arithmetic

$ py '3 * 1.5'
4.5

Automatic imports

$ 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.

Lists are printed row by row

$ py 'range(3)'
0
1
2

$ py '[range(3)]'
[0, 1, 2]

py -x 'foo(x)' applies foo to each line of input

$ 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

Append .txt to every file in the directory

• sharp quotes are swapped out for single quotes
• single quotes handle spaces in filenames

$ ls | py -x '"mv `%s` `%s`" % (x,x)' | sh -x
+ mv MANIFEST.in MANIFEST.in
mv: 'MANIFEST.in' and 'MANIFEST.in' are the same file
+ mv README.md README.md
mv: 'README.md' and 'README.md' are the same file
+ mv build build
mv: cannot move 'build' to a subdirectory of itself, 'build/build'
+ mv pythonpy pythonpy
mv: cannot move 'pythonpy' to a subdirectory of itself, 'pythonpy/pythonpy'
+ mv pythonpy.egg-info pythonpy.egg-info
mv: cannot move 'pythonpy.egg-info' to a subdirectory of itself, 'pythonpy.egg-info/pythonpy.egg-info'
+ mv setup.py setup.py
mv: 'setup.py' and 'setup.py' are the same file
+ mv test test
mv: cannot move 'test' to a subdirectory of itself, 'test/test'
+ mv tox.ini tox.ini
mv: 'tox.ini' and 'tox.ini' are the same file

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 'x.startswith("and")' | 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 'collections.Counter(l).most_common(5)'
('s', 11327)
('c', 9521)
('p', 7659)
('b', 6068)
('m', 5922)

Known issues

• WIP
• I'm not sure whether I'll worry about the bash completion
• Licensing: multiple authors, listed as MIT. https://github.com/Russell91 seems to have disappeared, still owns https://pypi.org/project/pythonpy/. /LICENSE refers to my changes and modifications, with much gratitude to the original authors for all the heavy lifting!