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Project description
Cool.py
Make Python code cooler. 100% coverage. Use and enjoy this code!
Install
pip install cool
Or fetch from github
pip install git+https://github.com/abersheeran/cool@setup.py
Usage
Pipe
Note: as fast as you didn't use F!
Use pipeline to pass data as a positional parameter to the next function:
from cool import F
range(10) | F(filter, lambda x: x % 2) | F(sum) == 25
Or you need to pass multiple parameters through the pipeline:
from cool import FF
(1, 2) | FF(lambda x, y: x + y) == 3
You can use ...
as a placeholder. This is useful when you need to pass non-continuous parameters to create a partial function.
from functools import reduce
from cool import F
range(10) | F(reduce, lambda x, y: x + y) == 45
range(10) | F(reduce, lambda x, y: x + y, ..., 10) == 55
square = F(pow, ..., 2)
range(10) | F(map, square) | F(sum) == 285
The range(10) | F(reduce, lambda x, y: x + y, ..., 10)
is equivalent to reduce(lambda x, y: x + y, range(10), 10)
.
Redirect
Just like the redirection symbol in Shell
, you can redirect the output to a specified file or TextIO
object through >
or >>
.
Note: R
inherits from functools.partial
.
from pathlib import PurePath
from cool import R
# Redirect output to specified filepath
R(print, "hello") > PurePath("your-filepath")
# Append mode
R(print, "world") >> PurePath("your-filepath")
Redirect to opened file or other streams.
from io import StringIO
from cool import R
with open("filepath", "a+", encoding="utf8") as file:
R(print, "hello") >> file
out = StringIO("")
R(print, "hello") > out
out.seek(0, 0)
out.read() == "hello\n"
Maybe you also want to block the output, just like > /dev/null
.
from cool import R
R(print, "hello") > None
# Or
R(print, "hello") >> None
Note that after the calculation is over, R
will faithfully return the return value of your function. Try the following example.
from pathlib import PurePath
from cool import F, R
def func(num):
return range(num) | F(map, lambda x: print(x) or x) | F(sum)
print(R(func, 10) > PurePath("filepath"))
Set Global
Maybe you don't want to use from cool import F
in every file of the entire project, you can use the following code to set it as a global function, just like min
/max
/sum
.
import cool
cool.set_global(cool.F, cool.FF)
Maybe you also want to expose functools.reduce
to the world, just like map
/filter
.
import functools
import cool
cool.set_global(cool.F, cool.FF, functools.reduce)
Project details
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