Check if string contains characters python
To check if a Python string contains all the characters from a list, check if each character exists in the word: Show Here is an example: chars = ["H", "e", "y"] word = "Hello" has_all = all([char in word for char in chars]) print(has_all) Output: False To learn other useful string methods in Python, feel free to check this article. Below you find a more detailed guide of how to check if a string contains characters from a list. Step-by-step GuideGiven a list of characters and a string, you can check if all the characters of a list are found in the target string following these steps:
Here is how it looks in code: 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. Add the truth to a truths list truths.append(truth) # 4. Check if all boolean values are True has_all = True for truth in truths: has_all = has_all and truth print(has_all) Output: False But you can make this piece of code shorter by using:
This makes the code look the same as in the example solution in the introduction: chars = ["H", "e", "y"] word = "Hello" has_all = all([char in word for char in chars]) print(has_all) Output: False To be more general, you can implement a function that gets the job done. Here is how it looks in code: def has_all(chars, string): return all([char in string for char in chars]) # Example call print(has_all("Hello", ["H","i"])) Output: False ConclusionToday you learned how to check if a Python string contains all characters present in a list. To recap, you need to run a loop through the list of the characters. Then you need to check if each of those characters exists in the target string. Thanks for reading. Happy coding! Further Reading50 Python Interview Questions In this guide, we'll take a look at how to check if a string contains a substring in Python. As usual, each approach we'll cover has different pros and cons. The in OperatorThe easiest way to check if a Python string contains a substring is to use the The
This operator is shorthand for calling an object's
To avoid this, you'll first want to check whether it points to
The String.index() MethodThe String type in Python has a method called Check out our hands-on, practical guide to learning Git, with best-practices, industry-accepted standards, and included cheat sheet. Stop Googling Git commands and actually learn it! If the substring is not found, a
This method is useful if you need to know the position of the substring, as opposed to just its existence within the full string. The String.find() MethodThe String type has another method called If
If you'd prefer to avoid the need to catch errors, then this method should be favored over Regular Expressions (RegEx)Regular expressions provide a more flexible (albeit more complex) way to check strings for pattern matching. Python is shipped with a built-in module for regular expressions, called
This method is best if you are needing a more complex matching function, like case insensitive matching. Otherwise the complication and slower speed of regex should be avoided for simple substring matching use-cases. This article was written by Jacob Stopak, a software consultant and developer with passion for helping others improve their lives through code. Jacob is the creator of Initial Commit - a site dedicated to helping curious developers learn how their favorite programs are coded. Its featured project helps people learn Git at the code level. How do you check if a string contains a character?Use the String. includes() method to check if a string contains a character, e.g. if (str. includes(char)) {} . The include() method will return true if the string contains the provided character, otherwise false is returned.
How do you check if a string contains a word Python?The simplest way to check if a string contains a substring in Python is to use the in operator. This will return True or False depending on whether the substring is found. For example: sentence = 'There are more trees on Earth than stars in the Milky Way galaxy' word = 'galaxy' if word in sentence: print('Word found.
How do you make sure a string only contains certain characters?Use all() to check if a string contains certain characters. string = "abcd". matched_list = [characters in char_list for characters in string]. print(matched_list) Output. [True, True, True, False]. string_contains_chars = all(matched_list). print(string_contains_chars) Output. False.. |