print(第一個) -> 正確
print(第二個) -> 正確
......
print(好多好多個) -> 終於錯了

print(第n個) -> 不符預期(第n個是根據第n-1個)
print(第n-1個) -> 不符預期(第n-1個是根據第n-2個)
......
print(第x個) -> 終於對了

import logging
#就...import模組(還沒忘吧!?
logging.basicConfig(level=logging.DEBUG)
#一開始的基本設定，level表示輸出的最低層級
logger = logging.getLogger( __name__ )
#創建一個紀錄器

import logging
logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger( __name__ )
a = 1+4
logger.debug(a)
b = a+6
print(b)
logger.info("print b")
#DEBUG:__main__:5
#11
#INFO:__main__:print b

import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger( __name__ )
a = 1+4
logger.debug(a)
b = a+6
print(b)
logger.info("print b")
#11
#INFO:__main__:print b
#DEBUG那行消失了!

import logging
logger = logging.getLogger( __name__  )
def some_method():
    logger.info('begin of some_method')
def another_method():
    logger.info('begin of another_mathod')
    
def main():
    logging.basicConfig(level=logging.DEBUG)
    some_method()
    another_method()
    
if __name__ == "__main__":
    main()

import logging
logging.basicConfig(filename='檔案名稱', filemode='w',level=logging.INFO)
#filemode是寫入方式
#預設是a(ppend)，寫入會接在上一個後面
#w(rite)是複寫，也就是說會覆蓋掉之前的紀錄
logger = logging.getLogger( __name__ )
a = 1+4
logger.debug(a)
b = a+6
print(b)
logger.info("print b")

#執行後log會寫入檔案中

#python3.7版後可以不用import
#插入中斷點改為直接使用函式:
breakpoint()

list[3] = 1
print(list[3])
#Traceback (most recent call last):
#  File "main.py", line 75, in <module>
#    list[3] = 1
#TypeError: 'type' object does not support item assignment
#他到底在寫甚麼...QAQ