在“ if”语句中使用“ in”和“ is”有什么区别？

Question

I just started Python two days ago and I came across 2 types of if statements: one where is was used and another where in was used. So what is basically the difference between them?

Answer 1

The is keyword is used to test if two variables refer to the same object. Example:

x = ["apple", "banana", "cherry"]
y = x
print(x is y)

The in keyword is used to check if a value is present in a sequence (list, range, string etc.). Example:

fruits = ["apple", "banana", "cherry"]

if "banana" in fruits:
  print("yes")

Those are not "part" of an IF statement per-se.