What is the python equivalent of strpos($elem,"text") !== false)

Question

What is the python equivalent of:

if (strpos($elem,"text") !== false) {
    // do_something;  
}

http://stackoverflow.com/questions/5319922/python-check-if-word-is-in-a-string — open source guy, Jun 17 '13 at 08:32
Thanks for your ninja quick response. However I recieve this error when using .find: AttributeError: 'list' object has no attribute 'find' — Cosco Tech, Jun 17 '13 at 08:36

score 40 · Accepted Answer · answered Jun 17 '13 at 08:30

40

returns -1 when not found:

pos = haystack.find(needle)
pos = haystack.find(needle, offset)

raises ValueError when not found:

pos = haystack.index(needle)
pos = haystack.index(needle, offset)

To simply test if a substring is in a string, use:

needle in haystack

which is equivalent to the following PHP:

strpos(haystack, needle) !== FALSE

From http://www.php2python.com/wiki/function.strpos/

answered Jun 17 '13 at 08:30

xdazz

158,678
38
247
274

thank you for the solution. just to clarify i used `if needle in haystack:` – Cosco Tech Jun 17 '13 at 09:00
I fell in love with `needle in haystack`. Coming from PHP, Python code is so human readable... – JuliSmz Feb 06 '20 at 20:39

score 4 · Answer 2 · answered Jun 17 '13 at 08:39

4

if elem.find("text") != -1:
    do_something

answered Jun 17 '13 at 08:39

Javier Provecho Fernández

364
2
10

This is exactly what I am using. But i receive the following error:AttributeError: 'list' object has no attribute 'find' – Cosco Tech Jun 17 '13 at 08:47
I think you are searching into a object, not into a string. If you want to search a string into a object(w/ strings), you should use a loop. Check this and update it to your code: `if "this is string example....wow!!!".find("exam") != -1: print "works";` – Javier Provecho Fernández Jun 17 '13 at 08:55
AttributeError: 'Response' object has no attribute 'find' – Anass Oct 03 '20 at 01:49

score 0 · Answer 3 · answered Jul 20 '16 at 18:26

Is python is really pretty that code using "in":

in_word = 'word'
sentence = 'I am a sentence that include word'
if in_word in sentence:
    print(sentence + 'include:' + word)
    print('%s include:%s' % (sentence, word))

last 2 prints do the same, you choose.

What is the python equivalent of strpos($elem,"text") !== false)

3 Answers3

returns -1 when not found:

raises ValueError when not found: