检查元素是否存在于列表中

Question

I have a list hi

w = ['4KUI_YLR242C.pdb', '2CQA_CGI-52.pdb', '4G4S_YFR051C.pdb']


if '4KUI' in w:
    print "got !!"

But, I am not able to print 'got'. how can I do that?

Answer 1

This is because there is no element in w that is '4KUI' . There certainly is one that starts that way, though.
I think this is what you're looking for:

w = ['4KUI_YLR242C.pdb', '2CQA_CGI-52.pdb', '4G4S_YFR051C.pdb']
if any(i.startswith("4KUI") for i in w):
    print "got !!"

Answer 2

you are comparing the whole string there. you need to do something like

for string in w:
    if '4kui' in string:
        print "got!!"

Answer 3

Example

#!/usr/bin/python

entries = ['Glasgow', 'Edinburgh', 'Scotland', 'Dundee']

if [entry for entry in entries if entry.startswith('Dun')]:
        print "Found entry for Dundee"

Execution

python example.py

Answer 4

In this context "in" is determining whether '4KUI' is the value of one of the elements in your list. What you want is to see if '4KUI' is contained within one of the elements in your list. Try this:

w = ['4KUI_YLR242C.pdb', '2CQA_CGI-52.pdb', '4G4S_YFR051C.pdb']

for f in w:
  if '4KUI' in f:
    print "got !!"

Answer 5

w = ['4KUI_YLR242C.pdb', '2CQA_CGI-52.pdb', '4G4S_YFR051C.pdb']

for item in w:
        if "4KUI" in item:
                print "got !!"