Yardanico / Nimpylib
Licence: mit
Some python standard library functions ported to Nim
Stars: ✭ 88
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NimPylib
Nimpylib is a collection of Python-like operators and functions (syntax sugar). It can help you to translate your Python program to Nim.
Usage
import pylib
print 42 # print can be used with and without parenthesis too, like Python2.
print( f"{9.0} Hello {42} World {1 + 2}" ) # Python-like string interpolation
let python_like_range = xrange(0, -10, -2) # range() is named xrange() like Python2
print(list(python_like_range)) # @[0, -2, -4, -6, -8]
for i in xrange(10):
# 0 1 2 3 4 5 6 7 8 9
print(i, endl=" ")
print("done!")
# Python-like variable unpacking
let data = list(xrange(3, 15, 2))
data.unpack(first, second, *rest, last)
assert (first + second + last) == (3 + 5 + 13)
assert rest == @[7, 9, 11]
if (a := 6) > 5:
assert a == 6
if (b := 42.0) > 5.0:
assert b == 42.0
if (c := "hello") == "hello":
assert c == "hello"
print(capwords("hello world capitalized")) # "Hello World Capitalized"
print("a".center(9)) # " a "
print("" or "b") # "b"
print("a" or "b") # "a"
print(not "") # true
print("Hello,", input("What is your name? "), endl="\n~\n")
pass # do nothing
pass str("This is a string.") # discard the string
let integer_bytes = 2_313_354_324
var bite, kilo, mega, giga, tera, peta, exa, zetta, yotta: int
(kilo, bite) = divmod(integer_bytes, 1_024)
(mega, kilo) = divmod(kilo, 1_024)
(giga, mega) = divmod(mega, 1_024)
(tera, giga) = divmod(giga, 1_024)
(peta, tera) = divmod(tera, 1_024)
(exa, peta) = divmod(peta, 1_024)
(zetta, exa) = divmod(exa, 1_024)
(yotta, zetta) = divmod(zetta, 1_024)
let arg = "hello"
let anon = lambda: arg + " world"
assert anon() == "hello world"
print(json_loads("""{"key": "value"}""")) # {"key":"value"}
print(sys.platform) # "linux"
print(platform.processor) # "amd64"
var truty: bool
truty = all([True, True, False])
print(truty) # false
truty = any([True, True, False])
print(truty) # true
from std/os import sleep
timeit(100): # Python-like timeit.timeit("code_to_benchmark", number=int)
sleep(9) # Repeats this code 100 times. Output is very informative.
# 2020-06-17T21:59:09+03:00 TimeIt: 100 Repetitions on 927 milliseconds, 704 microseconds, and 816 nanoseconds, CPU Time 0.0007382400000000003.
# Support for Python-like with statements
# All objects are closed at the end of the with statement
with open("some_file.txt", 'w') as file:
file.write_line("hello world!")
with open("some_file.txt", 'r') as file:
while not end_of_file(file):
print(file.read_line())
with NamedTemporaryFile() as file:
file.write_line("test!")
with TemporaryDirectory() as name:
print(name)
type Example = ref object
start: int
stop: int
step: int
class Example(object): # Mimic simple Python "classes".
"""Example class with Python-ish Nim syntax!."""
def init(self, start, stop, step=1):
self.start = start
self.stop = stop
self.step = step
def stopit(self, argument):
"""Example function with Python-ish Nim syntax."""
self.stop = argument
return self.stop
let e = newExample(5, 3)
print(e.stopit(5))
Nimpylib heavily relies on Nim generics, converters, operator overloading, and even on concepts.
- Check the Examples folder for more examples. Have more Macros or Templates for Python-like syntax, send Pull Request.
Installation
To install nimpylib, you can simply run
nimble install pylib
- Uninstall with
nimble uninstall pylib
. https://nimble.directory/pkg/pylib
Requisites
Supported features
- [x] F-Strings
f"foo {variable} bar {1 + 2} baz"
and string functions - [x] Python-like variable unpacking
- [x] Math with Float and Int mixed like Python.
- [x]
import antigravity
- [x]
from __future__ import braces
- [x]
lambda:
- [x]
with open("file.ext", 'w'):
Read, write, append, andfile.read()
. - [x]
with tempfile.TemporaryDirectory():
Read, write, append, andfile.read()
. - [x]
with tempfile.NamedTemporaryFile() as file:
Read, write, append, andfile.read()
. - [x]
timeit()
with Nanoseconds precision - [x]
json.loads()
also can Pretty-Print - [x]
True
/False
- [x]
pass
also can take and discard any arguments - [x]
:=
Walrus Operator - [x]
{"a": 1} | {"b": 2}
Dict merge operator - [x]
|=
Dict merge operator - [x] Python-like OOP class with methods and DocStrings (without inheritance)
- [x]
abs()
- [x]
all()
- [x]
any()
- [x]
bin()
- [x]
chr()
- [x]
divmod()
- [x]
enumerate()
- [x]
filter()
- [x]
float()
- [x]
hex()
- [x]
input()
- [x]
int()
- [x]
iter()
- [x]
list()
- [x]
map()
- [x]
max()
- [x]
min()
- [x]
oct()
- [x]
ord()
- [x]
print("foo")
/print "foo"
Python2 like - [x]
range()
but namedxrange()
like in Python 2 - [x]
str()
- [x]
sum()
- [x]
<>
Python1 and Python2!=
- [x]
long()
Python2 like - [x]
unicode()
Python2 like - [x]
ascii()
Python2 like - [x]
u"string here"
/u'a'
Python2 like - [x]
b"string here"
/b'a'
Python2 like - [ ]
isinstance()
- [ ]
issubclass()
- [ ]
id()
- More...
Other Python-like modules
Tests
$ nimble test
[OK] Range-like Nim procedure
[OK] Floor division
[OK] Class macro
[OK] tonim macro
[OK] String operations
[OK] Modulo operations
2020-06-17T22:07:28+03:00 TimeIt: 9 Repetitions on 118 microseconds and 711 nanoseconds, CPU Time 5.740999999999993e-05.
[OK] Miscelaneous
[OK] unpack macro
Stats
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