检查列表中的哪个元素具有我要搜索的字符串

Question

I have a list, I want to check whether the string "Monday" is in it, but I want to know, if it is then what element of the list is it in?

    list1 = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]
if "Monday" in list1:
    print("True")

Answer 1

list1 = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]
if "Monday" in list1:
    print(list1.index("Monday"))

Answer 2

You can try using the enumerate() function as such:

for i, j in enumerate(["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]):
    if j == 'Monday':
        print i

This will give you the index location of the variable "Monday," in this instance, wherever in the list the item is - taking into account that it might be listed in multiple locations.

Answer 3

If we are searching for "b":

[x for x,y in enumerate(["a","b","b","c","d","e","f","g"]) if "b" in y]

Will account for multiple appearances and give the indexes of all of them as a list

the above returns as: [1, 2]