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I need a python regular expression to check if a word is present in a string. The string is separated by commas, potentially.
So for example,
line = 'This,is,a,sample,string' I want to search based on "sample", this would return true. I am crappy with reg ex, so when I looked at the python docs, I saw something like
import re re.match(r'sample', line) But I don't know why there was an 'r' before the text to be matched. Can someone help me with the regular expression?
423
Use the string method startswith() for forward matching, i.e., whether a string starts with the specified string. You can also specify a tuple of strings. True is returned if the string starts with one of the elements of the tuple, and False is returned if the string does not start with any of them.
Use the test() method to check if a regular expression matches an entire string, e.g. /^hello$/. test(str) . The caret ^ and dollar sign $ match the beginning and end of the string. The test method returns true if the regex matches the entire string, and false otherwise.
Are you sure you need a regex? It seems that you only need to know if a word is present in a string, so you can do:
>>> line = 'This,is,a,sample,string' >>> "sample" in line True If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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