Some Python syntactic sugar

Number separator

a=10_000_000a=1e7

Swap variable values

a,b=b,a

Continuous Comparison

if 90<=a<=100://......

String Multiplication

'-'*100

List concatenation

a=[0,1,2,3]b=[4,5,6,7]c=a+b

List slices

a[x:y]x is empty to start from the beginningy is empty means to endx and y can also be negative numbers, indicating the i-th penultimate

Pack and Unpack

a=[1,2]x,y=a

with statement

with open("xxx") as fp://....

List Comprehension

a=[i**2 for i in range(10)]