Enables Python to be functionally chain-styled.
- Simplified Chinese documents here.
If you are interested in me,you can follow my Blog(一波软广2333)。
install form pypi:
$ pip install fc
and you just import Fc,like this: from fc import Fc
then you can enjoy lambda like Kotlin/JS:
from fc import Fc
l = (
Fc([1, 2, 3, 4, 5])
.map(lambda x: x + 1)
.filter(lambda x: x > 4).print() # [5, 6]
.map(lambda x: x + 1).print() # [6, 7]
.cat([8, 9]).print() # [6, 7, 8, 9]
.add(10).print() # [6, 7, 8, 9, 10]
.catHead([1, 2, 3, 4, 5]).print() # [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
.limit(3)
.done()
)
assert l == [1, 2, 3]if you not like single line lambda for python,you can import mml(Make Multi-line Lambda) of fc like this:
from fc import Fc
from fc import mml as m
# normal
assert Fc([1, 2, 3]).map(m(
'''
lambda x:
x*=2
return x
'''
)).done() == [2, 4, 6]
# default value
assert Fc([1, 2, 3]).map(m(
'''
lambda x,y=1:
x+=y
return x
'''
)).done() == [2, 3, 4]
# support list,dict
assert m(
'''
lambda *l,**k:
return (l,k)
'''
)(1, a=2) == ((1,), {'a': 2})
# even supports recursive anonymous functions(but must use {self})
assert Fc([1, 2, 3, 4, 5]).map(m('''
lambda x:
if x<=0: return 0
else: return x+{self}(x-1)
''')).done() == [1, 3, 6, 10, 15]You can check this this test file and understand more.