33 lines (19 loc) · 407 Bytes

MyNote-Python

h2

enumerate in for loop


for rowno , row in enumerate(rows, start=1)
    print(rowno, row)

don't catch all Exception

try:
    a = 'a' +1
except Exception as err:
    print("this could hide some bug")

data structure

tuple - record : pack/unpack, immutable, (1,2,3)
list - same type, [1,2,3]
set - distinct , {1,2,3}
dict - {'a':1, 'b':2}