FerdinaKusumah

from itertools import chain

"""Flatten list from nested list"""
a = [[1, 2], [3, 4], [5, 6]]

flat_list = list(chain(*a))
print("Flatten list = {}".format(flat_list))
# Flatten list = [1, 2, 3, 4, 5, 6]

FerdinaKusumah

from collections import OrderedDict

"""Remove duplicate in list"""
a = [1, 1, 3, 4, 6, 7, 4, 6, 2, 1]

remove_duplicate_list = list(set(a))
print(remove_duplicate_list)
# [1, 2, 3, 4, 6, 7]

"""Remove duplicate in dict and keep order"""

FerdinaKusumah

"""Find index min and max in list"""
a = [4, 3, 7, 2, 12]


def get_min(arr: list) -> int:
  return min(range(len(arr)), key=arr.__getitem__)

def get_max(arr: list) -> int:
  return max(range(len(arr)), key=arr.__getitem__)

FerdinaKusumah

"""Merge dict"""
a = {"apple": 10}
b = {"banana": 3}

example1 = {**a, **b}
print("Merge dict 1 to {}".format(example1))
# Merge dict 1 to {'apple': 10, 'banana': 3}

example2 = dict(a.items() | b.items())
print("Merge dict 2 to {}".format(example2))

FerdinaKusumah

"""List string"""
a = ["a", "b", "c", "d"]
string_separated = ",".join(a)
print("Join string from list to {}".format(string_separated))
# Join string from list to a,b,c,d

"""List Number"""
b = [1, 2, 3, 4, 5]
number_separated = ",".join(map(str, b))
print("Join number from list to {}".format(number_separated))

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"""For else"""
a = [1, 2, 3, 4]
# Search number in list

search_num = 10
for num in a:
  if num > search_num:
    break
else:
  print("Sorry but number you're trying to find is not found")

FerdinaKusumah

"""Sort dict by keys or values"""
a = dict()
a['banana'] = 5
a['apple'] = 2
a['orange'] = 3

"""Before sort"""
print("Before sort = {}".format(a))
# Before sort = {'banana': 5, 'apple': 2, 'orange': 3}

FerdinaKusumah

"""Get dictionary value and set default value when not exists"""
a = dict()
a['apple'] = 10
a['banana'] = 12
print(a)
# {'apple': 10, 'banana': 12}

"""Print print wheneather not exists value and set default value"""
print(a.get('pear', 5))
# 5

FerdinaKusumah

from copy import deepcopy

"""Clone or copy object to new ones"""
a = [1, 2, 3, 4]
b = deepcopy(a)

"""Try to adding new value in list a"""
a.append(5)

"""Now print this value"""

FerdinaKusumah

"""Chain function call"""
def sum_product(a, b):
  return a + b

def reduce_product(a, b):
  return a - b

need_to_sum = True
a = 10
b = 4