Python基本文法

def()

def second():

  for i in range(1,51):
    if i%3==0 and i%5==0:
      print(i)

if __name__ == "__main__":
  second()

if __name__ == "__main__":
__name__이라는 변수의 값이 __main__이라면 아래의 코드를 실행하라.

def sum(a,b)     # a,b= 파라미터 = 매개변수
print(sum(3,5))  # 3,5 = 인자 = argument

Variables, Expressions, and Statements

エラー

while True:
  1

value = 2/0

コメント

繰り返し文-break,continue

count = 1
while True:  #True 면 계속 실행
    print(count)
    count += 2    # count =count+2
    if count > 10:  # count = 12 => 12>10 => 참=True=Truthy
         break
------------------------
1
3
5
7
9

continue vs pass

for x in range(8):
    if x % 2 == 0:
        continue
    print(x)
------------------------------------
1, 3, 5, 7

for x in range(8):
    if x % 2 == 0:
        pass
    print(x)
------------------------------------
0, 1, 2, 3, 4, 5, 6, 7

論理演算子

print(True and True)  

print(False or False) 

print(not True) 

オーバーラップ条件

x, y = 3, 5

if x == y:
    print('x and y are equal')
else:
    if x < y:
        print('x is less than y')
    else: 
        print('x is greater than y')

Python基本資料構造

リスト:[]

方法

チュートリアル:()

ディックシャーナ:{key:value}

方法

x = ('key1', 'key2', 'key3')
y = 1
new_dict = dict.fromkeys(x, y)
print(new_dict)
dict_without_values = dict.fromkeys(x)
print(dict_without_values)
-------------------------------------
{'key1': 1, 'key2': 1, 'key3': 1}
{'key1': None, 'key2': None, 'key3': None}

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
x = car.get("model")
print(x)
---------------
CR-V

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
x = car.items()
x
-------------------
dict_items([('brand', 'Honda'), ('model', 'CR-V'), ('year', 2002)])

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
x = car.pop("model")
print(x)
print(car)
------------
CR-V
{'brand': 'Honda', 'year': 2002}

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
print(car.popitem())
print(car)
---------------------------------
('year', 2002)
{'brand': 'Honda', 'model': 'CR-V'}

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
car.update({"color": "black"})
print(car)
-------------------------
{'brand': 'Honda', 'model': 'CR-V', 'year': 2002, 'color': 'black'}

car = {
     "brand": "Honda",
     "model": "CR-V",
     "year": 2002
 }
x = car.values()
print(x)
car["color"] = "black"
print(x)
----------------------------
dict_values(['Honda', 'CR-V', 2002])
dict_values(['Honda', 'CR-V', 2002, 'black'])

デバッグ

1.set_trace()

import pdb

pdb.set_trace()
----------------
(Pdb)   
# 코드가 여기서 멈추므로, 값을 확인 or 특정 단계 검토 등 다양한 작업 가능

デフォルトの移動

ブレークポイント():Python 3.7以降

sum = 0
breakpoint()
print(sum)

N321

is vs ==

list1 = [1, 2, 3]

list2 = [1, 2, 3]

list1 == list2

>>> True

list1 is list2

>>> False

list1 = [1, 2, 3]

list2 = list1

list1 == list2

>>> True

list1 is list2

>>> True

isinstance

詳細