s=list(range(20))
def get_first_m_and_last_m(s,m):
# 注:如果使用s[:m-1],s[-m:-1],就會出錯,特此記錄
return s[:m],s[-m:]
get_first_m_and_last_m(s,3)
([0, 1, 2], [17, 18, 19])
s=list(range(20))
def get_first_m_and_last_m(s,m):
# 注:如果使用s[:m-1],s[-m:-1],就會出錯,特此記錄
return s[:m],s[-m:]
get_first_m_and_last_m(s,3)
([0, 1, 2], [17, 18, 19])