在 python 的单个元素列表中检查字符串是否存在的有效方法是什么

Question

I have a single element list like below

listx=['Digital Operations']

My goal is to just check if the word 'Digital' is present in the list listx

I wrote the below code

if any('Digital') in listx:
  print("the word digital is present")
else:
  print("word Digital not found")

I am getting the output "word Digital not found" despite it being clearly there. What am i doing wrong?

Answer 1

Try this:-

listx=['Digital Operations']

if 'Digital' in listx[0]:
    print("the word digital is present")
else:
    print("word Digital not found")

Output:-

the word digital is present

Answer 2

the any() function takes an iterable (for example a list) and returns True if any of its values is True . You are calling it with a str wich will evaluate to True So basically your if statement then says

if True in listx:

which will in turn evaluate to False , causing your problem.

If you would like to use any() you could use a list comprehension like this:

listx = ['Digital Operations']

listy = ['Digital' in elem for elem in listx]
if any(listy):
  print("the word digital is present")
else:
  print("word Digital not found")

For a more efficent version you can use a generator expression that replaces the need for listy and combines it into the if -statement like this:

if any('Digital' in elem for elem in listx):

thank's to wjandrea comment

Answer 3

any() checks for True values, so if you change your first line to

if any(any([x=='Digital' for x in y.split()]) for y in listx):

You should be fine.