python string contains character - Brave Search

How to check a string for specific characters?

stackoverflow.com › questions › 5188792 › how-to-check-a-string-for-specific-characters

Assuming your string is s:

'$' in s        # found
'$' not in s    # not found

# original answer given, but less Pythonic than the above...
s.find('$')==-1 # not found
s.find('$')!=-1 # found

And so on for other characters.

... or

pattern = re.compile(r'[\d\$,]')
if pattern.findall(s):
    print('Found')
else:
    print('Not found')

... or

chars = set('0123456789$,')
if any((c in chars) for c in s):
    print('Found')
else:
    print('Not Found')

Answer from dappawit on Stack Overflow

geeksforgeeks.org › python › python-check-if-string-contains-character

Check if string contains character - Python - GeeksforGeeks

July 23, 2025 - Explanation: The in operator is used to test membership, returning True if "e" is present in the string, and False otherwise. If found, it prints "Character found!", otherwise, it prints "Character not found!".

stackoverflow.com › questions › 5188792 › how-to-check-a-string-for-specific-characters

python - How to check a string for specific characters? - Stack Overflow

Assuming your string is s:

'$' in s        # found
'$' not in s    # not found

# original answer given, but less Pythonic than the above...
s.find('$')==-1 # not found
s.find('$')!=-1 # found

And so on for other characters.

... or

pattern = re.compile(r'[\d\$,]')
if pattern.findall(s):
    print('Found')
else:
    print('Not found')

... or

chars = set('0123456789$,')
if any((c in chars) for c in s):
    print('Found')
else:
    print('Not Found')

user Jochen Ritzel said this in a comment to an answer to this question from user dappawit. It should work:

('1' in var) and ('2' in var) and ('3' in var) ...

'1', '2', etc. should be replaced with the characters you are looking for.

See this page in the Python 2.7 documentation for some information on strings, including about using the in operator for substring tests.

Update: This does the same job as my above suggestion with less repetition:

# When looking for single characters, this checks for any of the characters...
# ...since strings are collections of characters
any(i in '<string>' for i in '123')
# any(i in 'a' for i in '123') -> False
# any(i in 'b3' for i in '123') -> True

# And when looking for subsrings
any(i in '<string>' for i in ('11','22','33'))
# any(i in 'hello' for i in ('18','36','613')) -> False
# any(i in '613 mitzvahs' for i in ('18','36','613')) ->True

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reddit.com › r/learnpython › how can you check if a string contains any one character from a set of characters?

r/learnpython on Reddit: How can you check if a string contains any one character from a set of characters?

May 24, 2022 -

Is there some easy, built-in way to check if a given string contains at least one single digit, 0-9? Everything I'm searching talks about the in operator or the find method, but those seem to require that you already know which digit you are looking for.

I'm leaning toward using an RE, but I wanted to know if there was a simpler way first.

Examples that would evaluate to true would be:

'44 a b'
'aa ba 5'
'45 187'

and false would be any string without at least one digit.

I figure I can just try to match it with \d+, but I don't want to rely on REs too much, even though I find them fun!

Thanks!

There's str.isdigit() checking if a string contains digits only: >>> '44 a b'.isdigit() False >>> Combined with any, applied to each character: >>> any([c.isdigit() for c in "44 a b"]) True >>>

Returns True if there is a digit and False if no digit: >>> not set('44 a a b').isdisjoint('1234567890') True >>> not set('testing').isdisjoint('1234567890') False >>> or >>> bool(set('3 a a b') & set('1234567890')) True >>> bool(set('testing') & set('1234567890')) False >>>

oreilly.com › library › view › python-cookbook › 0596001673 › ch03s07.html

Checking Whether a String Contains a Set of Characters - Python Cookbook [Book]

July 19, 2002 - The solution generalizes to any sequence (not just a string), and any set (any object in which membership can be tested with the in operator, not just one of characters): def containsAny(str, set): """ Check whether sequence str contains ANY of the items in set.

Authors: Alex MartelliDavid Ascher

Published: 2002

Pages: 608

quora.com › How-do-I-check-if-a-string-contains-a-character-in-Python

How to check if a string contains a character in Python - Quora

Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers.

reddit.com › r/learnpython › how to check if a string contains a character in a list

r/learnpython on Reddit: How to check if a string contains a character in a list

February 19, 2022 -

I'm really new to python and i'm having some trouble figuring out how to check if a list contains a certain character.

For example:
list = ['a1', 'a2', 'b1', 'b2', 'a3', 'a5', 'c3']

how would I check to see what elements contain the string 'a'? sorry if i didn't word my question properly i'm still very new to coding, but any help would be appreciated.

Use a loop , iterate through the list, check for existence of the character .

mighty correct hospital straight glorious office fade degree library touch This post was mass deleted and anonymized with Redact

codingem.com › home › python how to check if string contains characters from a list

Python How to Check If String Contains Characters from a List - codingem.com

October 12, 2022 - Check if a character is in the target string. Add the truth to a list. Check if all truth values in a list are True. ... chars = ["H", "e", "y"] word = "Hello" truths = [] # 1. Loop through the chars for char in chars: # 2. Check if a character is in the target string truth = char in word # 3.

learndatasci.com › solutions › python-string-contains

Python String Contains – See if String Contains a Substring – LearnDataSci

Of the three options listed in this article, using if ... in is usually the best approach for seeing if a string contains a substring. Remember that the simplest solution is quite often the best one! Another option you've got for searching a string is using the find() method. If the argument we provide find() exists in a string, then the function will return the start location index of the substring we're looking for. If not, then the function will return -1. The image below shows how string characters are assigned indexes:

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javatpoint.com › check-if-string-has-character-in-python

Check if String has Character in Python - Javatpoint

Check if String has Character in Python with tutorial, tkinter, button, overview, canvas, frame, environment set-up, first python program, etc.

realpython.com › python-string-contains-substring

How to Check if a Python String Contains a Substring – Real Python

September 10, 2025 - You may only want to match occurrences of your substring followed by punctuation, or identify words that contain the substring plus other letters, such as "secretly". For such cases that require more involved string matching, you can use regular expressions, or regex, with Python’s re module. For example, if you want to find all the words that start with "secret" but are then followed by at least one additional letter, then you can use the regex word character (\w) followed by the plus quantifier (+):

replit.com › home › discover › how to check if a string contains certain characters in python

How to Check a String for Characters in Python | Replit

April 14, 2026 - Learn how to check if a Python string contains certain characters. We cover methods, tips, real-world uses, and common error debugging.

stackoverflow.com › questions › 3437059 › does-python-have-a-string-contains-substring-method

Does Python have a string 'contains' substring method? - Stack Overflow

Use the in operator:

if "blah" not in somestring: 
    continue

Note: This is case-sensitive.

You can use str.find:

s = "This be a string"
if s.find("is") == -1:
    print("Not found")
else:
    print("Found")

The find() method should be used only if you need to know the position of sub. To check if sub is a substring or not, use the in operator. (c) Python reference

codecademy.com › article › how-to-check-if-a-string-contains-a-substring-in-python

How to Check if a String Contains a Substring in Python | Codecademy

The performance is generally similar for small strings, but in is often preferred over .find() for readability and simplicity. ... 'The Codecademy Team, composed of experienced educators and tech experts, is dedicated to making tech skills accessible to all. We empower learners worldwide with expert-reviewed content that develops and enhances the technical skills needed to advance and succeed in their careers.'Meet the full team ... Learn how to remove characters from a Python string using `rstrip()`, `replace()`, and `re.sub()` with examples.

askpython.com › python › string › python-string-contains

Python String contains: Check if String Contains Substring - AskPython

April 27, 2023 - Let’s look at some examples of ... in Python. str = "Hello World!" sub_str = "World" if (str.__contains__(sub_str)): print("String contains Substring") else: print("String does not contain Substring") Here we have specified a string, and then a substring, both containing some character, and then ...

stackoverflow.com › questions › 19463556 › string-contains-any-character-in-group › 71450485

python - String contains any character in group? - Stack Overflow

You could use any here.

>>> string = r"/\?%"
>>> test = "This is my string % my string ?"
>>> any(elem in test for elem in string)
True
>>> test2 = "Just a test string"
>>> any(elem in test2 for elem in string)
False

I think Sukrit probably gave the most pythonic answer. But you can also solve this with set operations:

>>> test_characters = frozenset(r"/\?%")
>>> test = "This is my string % my string ?"
>>> bool(set(test) & test_characters)
True
>>> test2 = "Just a test string"
>>> bool(set(test2) & test_characters)
False

datacamp.com › tutorial › python-string-contains

Python String Search and Replace: in, .find(), .index(), .count(), and .replace() | DataCamp

March 31, 2026 - Python’s text strings are Unicode. Substring operations are case-sensitive by default and implemented in C for speed. The most direct way to test if text appears inside a string is the in operator, which returns a Boolean using the string’s __contains__() implementation.

blog.udemy.com › home › it & development › software development › the many ways to check if a python string contains a substring

Ways to Check if a Python String Contains a Substring - Udemy Blog

April 14, 2026 - The python str class has a __contains__() method that will check if a python string contains a substring. It will return true if it’s found and will return false if it’s not. You will notice that the method name is wrapped in two underscores.

tutorialspoint.com › how-to-check-if-a-string-only-contains-certain-characters-in-python

How to check if a string only contains certain characters in Python?

September 2, 2025 - The given string is: 1234654185 Checking if it contains only {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'} True The given string is: 12346@ Checking if it contains only {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'} False · The re.fullmatch() function from the re module checks if the entire string matches a specific pattern of allowed characters.

tutorial.eyehunts.com › home › python string contains character

Python string contains the character

April 8, 2024 - The easiest way to check if a Python string contains a character is to use the in operator. It returns a Boolean (either True or False)...

digitalocean.com › community › tutorials › python-string-contains

Python String contains | DigitalOcean

Learn how to check if one Python string contains another using the contains () method. This case-sensitive instance method returns True or False based on …