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

Question

What is the python equivalent of:

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

Earl

#5320422 – Indiscreet

Thanks for your ninja quick response. However I recieve this error when using .find: AttributeError: 'list' object has no attribute 'find' – Earl

is there a module i should import to use the .find syntax – Earl

Answer 1

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/

Schlegel

thank you for the solution. just to clarify i used if needle in haystack: – Earl

I fell in love with needle in haystack. Coming from PHP, Python code is so human readable... – Beaird

Answer 2

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

Lawana

This is exactly what I am using. But i receive the following error:AttributeError: 'list' object has no attribute 'find' – Earl

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"; – Lancer

AttributeError: 'Response' object has no attribute 'find' – Obturate

Answer 3

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.

Overtrade