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set.py
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66 lines (53 loc) · 2.44 KB
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import sys
from contextlib import redirect_stdout
class Tee:
def __init__(self, *files):
self.files = files
def write(self, text):
for f in self.files:
f.write(text)
f.flush()
def flush(self):
for f in self.files:
f.flush()
output_file = "output.txt"
with open(output_file, "w") as f, redirect_stdout(Tee(sys.__stdout__, f)):
s = list(set([1, 1, 2, 2, 3, 6, 4, 5]))
print(f"Input list: {[1, 1, 2, 2, 3, 6, 4, 5]}\n")
print(f"Expression list(set([])): {s}") # не гарантирует сохранение исходного порядка элементов (сортирует массив)
lst = [1, 1, 2, 2, 3, 6, 4, 5]
unique_lst = list(dict.fromkeys(lst)) # гарантирует сохранение исходного порядка элементов
print(f"Expression list(dict.fromkeys()): {unique_lst}") # [1, 2, 3, 6, 4, 5]
res = []
for x in [1, 1, 2, 2, 3, 6, 4, 5]: # добавляет только уникальные значения в массив, при этом сохраняет исходный порядок (не сортирует)
if x not in res:
res.append(x)
print(f"Expression 'Explicit iterative deduplication': {res}")
a = {1, 2, 3, 4}
b = {3, 4, 5, 6}
print("----------")
print(f"Input set A: {a}")
print(f"Input set B: {b}\n")
print(f"Union A | b: {a | b}") # {1, 2, 3, 4, 5, 6} — объединение
print(f"Intersection A & B: {a & b}") # {3, 4} — пересечение
print(f"Difference A - B: {a - b}") # {1, 2} — разность
print(f"Symmetric_difference A ^ B: {a ^ b}") # {1, 2, 5, 6} — симметрическая разность
print("-----------")
a = {1, 2, 3}
b = {1, 2, 3, 4, 5}
print(f"Input set A: {a}")
print(f"Input set B: {b}\n")
print(f"B is subset A: {b.issubset(a)}") # False
print(f"A is subset B: {a.issubset(b)}") # True
print(f"B is superset A: {b.issuperset(a)}") # True
print(f"A is superset B: {a.issuperset(b)}") # False
print(f"A is disjoint B: {a.isdisjoint(b)}") # False
print("-----------")
a.update(b)
print(f"Updated a from b: {a}")
s = {1, 2, 3, 4}
t = {3, 4, 5, 6}
s.intersection_update(t)
print(f"Intersection_update s & t: {s}") # {3,4}
sys.stdout = sys.__stdout__
print(f"File {output_file} was updated")