Python Tasks & ML | ΠΠ°Π΄Π°ΡΠΈ ΠΏΠΎ ΠΏΠΈΡΠΎΠ½Ρ ΠΈ ΠΌΠ°ΡΠΈΠ½Π½ΠΎΠΌΡ ΠΎΠ±ΡΡΠ΅Π½ΠΈΡ
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Algorithms, functions, classes, regular expressions, iterators, generators, OOP, exceptions, NumPy, pandas, scikit-learn https://telega.in/c/python_tasks Questions β @dina_ladnyuk
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ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
[(Ρ
, Ρ) for Ρ
in range(3) if Ρ
% 2 == 0 for Ρ in range(3) if Ρ % 2 == 1]ΠΠ°ΠΊΠΎΠΉ ΠΈΠ· Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² Π½Π΅ Π²ΡΠ²Π΅Π΄Π΅Ρ [0, 4, 16]?
ΠΠ°Π½Ρ 4 Π²Π°ΡΠΈΠ°Π½ΡΠ° ΠΊΠΎΠ΄Π°:
#1
[Ρ
** 2 for Ρ
in range(5) if Ρ
% 2 == 0]
#2
list(map(lambda x: x**2, filter(lambda x: x % 2 == 0, range(5))))
#3
res = []
for x in range(5):
if x % 2 == 0:
y = x**2
res.append(y)
print(res)
#4
list(map(lambda x: x ** 2 % 4 == 0, range(5)))ΠΠ°ΠΊΡΡ ΠΈΠ· ΡΡΠ½ΠΊΡΠΈΠΉ Π½ΡΠΆΠ½ΠΎ ΡΠ²Π½ΠΎ ΠΈΠΌΠΏΠΎΡΡΠΈΡΠΎΠ²Π°ΡΡ, ΡΡΠΎΠ±Ρ Π΅Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ?
ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
M = [[1, 2], [3, 4]]
N = [[5, 6], [7, 8]]
sum([col1*col2 for row1, row2 in zip(M, N) for col1, col2 in zip(row1, row2)])ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
from functools import partial
from operator import lt
gt = partial(lt, 0)
l = list(filter(gt, [x for x in range(-1, 2) if x <= 0]))
print(l)ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
from functools import partial
from operator import gt
gt = partial(gt, 0)
l = list(filter(gt, [x for x in range(-2, 3) if x >= 0]))
print(l)ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
password = 'password'
adding = [Ρ
+ Ρ for Ρ
in '0123456789' for Ρ in '0123456789']
count = 0
for a in adding:
password = password + a
count += 1
print(count, password[-3:])ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
from functools import reduce
def f(acc, x):
acc[x] = x * 2
return acc
reduce(f, ["a", 3, (1,2)], {})ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
Π§ΡΠΎ Π²ΡΠ²Π΅Π΄Π΅Ρ ΠΊΠΎΠ΄?
import operator, functools
x1 = functools.reduce(operator.add, [2, 4, 6])
x2 = functools.reduce((lambda x, Ρ: x + Ρ) , [2, 4, 6])
print(x1 == x2)ΠΡΠ±Π΅ΡΠΈΡΠ΅ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΡΠΉ Π²Π°ΡΠΈΠ°Π½Ρ
ΠΠ°ΠΊΡΡ ΡΡΠ½ΠΊΡΠΈΡ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ΅Π°Π»ΠΈΠ·ΡΠ΅Ρ Π΄Π°Π½Π½Π°Ρ ΡΡΠ½ΠΊΡΠΈΡ?
def f(function, sequence):
s = sequence[0]
for x in sequence[1:]:
s = function(s, x)
return sΠΠ°ΠΊΠΎΠΉ Π²Π°ΡΠΈΠ°Π½Ρ Π½Π΅ Π²ΡΠ²Π΅Π΄Π΅Ρ [1, 2, 3, 4]
