The easiest and most effective way to see if a string contains a substring is by using if . How to Check if a String Contains a Substring Using the .find () Method in Python The .find () method works similarly to the .index () method - it checks to see if a string contains a substring, and if the substring is present, it returns its starting index. Python takes advantage of .__getitem__() to make the membership operators work correctly. To check if a value like "dog" or "drawing" is present in likes, you use the .values() method, which returns a view object with the values in the underlying dictionary. To be memory efficient, these iterators yield items on demand without keeping a complete series of values in memory. But how often is it in there? On each iteration, we check if the current list item is not contained in the To check for that, you can do what one of the previous answers suggested. Like many other operators, in and not in are binary operators. Why hasn't the Attorney General investigated Justice Thomas? Python Assume that name is a variable of type String that has been assigned a value. But the example shows that the target value can be of any data type. Techknowledgy : python. Privacy Policy. What sort of contractor retrofits kitchen exhaust ducts in the US? Therefore, as your iterable gets longer, the search time increases in direct proportion. Use the str.index () function. If youre new to programming or come from a programming language other than Python, you may be looking for the best way to check whether a string contains another string in Python. It will return the index at the start of the substring if the string contains a specific substring, and it will return -1 if the string does not contain a particular substring. In this case, you use a tuple of strings representing the username and the password of a given user. Python provides many additonal string methods that allow you to check how many target substrings the string contains, to search for substrings according to elaborate conditions, or to locate the index of the substring in your text. How to find a word by using regex python3? Notice how the German lowercase letter is equal to ss. Note: Lists, tuples, and range objects have an .index() method that returns the index of the first occurrence of a given value in the underlying sequence. Later, youll learn more about the Python data types that support membership tests. We can also use this as a class method on the str class, and use two arguments instead of one. Consider the following examples, which use random numbers to determine offsets at runtime: On your machine, you might get different results because youre working with random range offsets. If you need to check if a string does not contain any strings from a list, Another critical issue can arise when you use the in and not in operators with generator iterators. If you need to perform a case-insensitive membership test, convert both strings my_string = "Where's Waldo?" my_string. Remember that converting a list into a set is an operation with O(n) time complexity. The simplest solution would probably be to write a regex to match strings with those words, then throw out the string it if matches. The following is the syntax - # check if string s contains only numbers s.isdigit() It returns True if all the characters in the string are digits and False otherwise. Using Big O notation, youll say that value lookups in hash tables have a time complexity of O(1), which makes them super fast. The not operator is the Boolean or logical operator that implements negation in Python. You can have something like this: This is a naive example. Free Download: Click here to download the sample code that youll use to check if a string contains a substring. True or False stating that whether a digit is present in the string or not. Leave a comment below and let us know. He's an avid technical writer with a growing number of articles published on Real Python and other sites. For these examples, youve explicitly used list objects. takes an iterable as an argument and returns True if all elements in the Find centralized, trusted content and collaborate around the technologies you use most. The method contains() in Python String contains being used for functions. List comprehensions are If you consume all the items, then the iterator will be exhausted, and you wont be able to iterate over it again. It will not work in case you want to check if the column string contains any of the strings in the list. the query becomes: . Note: Unlike other sequences like lists, tuples, and range objects, strings provide a .find() method that you can use when searching for a given substring in an existing string. The following examples show how to use each method in practice with the following pandas DataFrame: The following code shows how to filter the pandas DataFrame for rows where the team column does not contain ets in the name: Notice that the resulting DataFrame does not contain any rows where the value in the team column contains ets in the name. string.ascii_lowercase The lowercase letters 'abcdefghijklmnopqrstuvwxyz'. For example, you could search for only the substrings that are followed by a comma (,) or a period (. Do you want "abluent" to print "yes" or "no"? I.e., In English, "If words contain blue, then say yes. Generator functions and generator expressions create memory-efficient iterators known as generator iterators. So we can use it to check if a string is part of another string or not. 'blue': print 'no' The return type of this method is therefore a boolean, so it will return either a True, or a False. But what if you want to find other occurrences of the substring? Even user-defined objects work. These arguments are start, stop, and step. When you use in or not in on a generator iterator, the operator will consume it while searching for the target value. If the output of count() is 0, then it means that string is not present in the list. Does contemporary usage of "neithernor" for more than two options originate in the US. Consider the following alternative version of Stack: The .__iter__() special method makes your class iterable, which is enough for membership tests to work. Heres your answer: Because an empty string is always considered a substring of any other string, an expression like "" in user.permissions will return True. This is similar to our previous usage, but we invoke this as a Class method on the String class. However, Python does not have a character data type, a single character is simply a string with a length of 1. In this tutorial, youll focus on the most Pythonic way to tackle this task, using the membership operator in. Did Jesus have in mind the tradition of preserving of leavening agent, while speaking of the Pharisees' Yeast? basics Therefore, these operators are known as membership operators. You can go into much more detail with your substring matching when you use regular expressions. How to Filter Pandas DataFrame Rows by Date lowercase. VIDEO ANSWER: The python program we ate should prompt the user for a password if the password is valid or invalid, and it should give the reason to be valid. If it returns -1 that means the string does not contain that substring. For lists and tuples, the membership operators use a search algorithm that iterates over the items in the underlying collection. The str.lower method For example, str1 = "Hello, world!" str2 = "I love Python." With this quick overview of how membership operators work, youre ready to go to the next level and learn how in and not in work with different built-in data types. You can use the in and not in operators with strings when you need to figure out if a given character is present in the target string. Note that the target key-value pairs must be two-item tuples with the key and value in that order. The second call to the function returns False because 8 isnt present in the input list of values. This helps the user in understanding if there is a sub-string present inside a string or not. Watch it together with the written tutorial to deepen your understanding: Check if a Python String Contains a Substring. You can use .count () to get your answer quickly using descriptive and idiomatic Python code: >>> >>> file_content.count("secret") 4 You used .count () on the lowercase string and passed the substring "secret" as an argument. How can we easily do it? You can get the same result using a list comprehension either with contains() or the not in operator directly: The above list comprehensions are shorter and arguably more readable than the equivalent filter() call from the previous example. list, use the any() function instead. If you need to know where in your string the substring occurs, then you can use .index() on the string object: When you call .index() on the string and pass it the substring as an argument, you get the index position of the first character of the first occurrence of the substring. We invoke the in operator on the superstring. Python uses a data structure called a hash table to implement dictionaries and sets. These are slightly different but complementary tests. By passing specific index positions, you can therefore skip over occurrences of the substring that youve already identified: When you pass a starting index thats past the first occurrence of the substring, then Python searches starting from there. How to turn off zsh save/restore session in Terminal.app. Almost there! In other words, you need to check if a given value is or is not a member of a collection of values. By adding the parentheses around secret, you managed to get rid of the punctuation! The quickest way to determine whether or not a Python string contains a substring is to use the in operator. We can use contains() in python in 3 ways. There are many operations that can be performed with strings which makes it one of the most used data types in Python. I want to have fixed starting words as 'start' and 'end', but I want text which cannot contain some words, because than it cannot be matched.. String does not contain target Using Python String contains () as a Class method We can also use this as a class method on the str class, and use two arguments instead of one. You need any if you want at least one of each in the string: if any(x.isalpha() for x in string) and any(x.isspace() for x in string): If you want at least one of each but no other characters you can combine all,any and str.translate , the following will only return True if we have at least one space, one alpha and contain only those characters.. from string import ascii_letters s = input . So, an expression like string.find(substring) >= 0 would be equivalent to a substring in string test. Your email address will not be published. In this article, we will check How to check if a string contains a number in Python, we are given a string and we have to return a Boolean result i.e. But I Do Want To Secretly Tell You That I Have One.""". So I have used str. However, if the value isnt in the sequence, then .index() raises a ValueError: You probably dont want to figure out whether a value is in a sequence or not by raising exceptions, so you should use a membership operator instead of .index() for this purpose. Check if a string does NOT contain substring in Python. In this case, you can do something like this: This function returns a generator iterator that yields square numbers on demand. The right way to compare with a list would be : Dystopian Science Fiction story about virtual reality (called being hooked-up) from the 1960's-70's. That means you can create expressions by connecting two operands. This conversion tricks the case sensitivity in the implicit string comparison. @DSM I think the other question already answered that but thanks. Should the alternative hypothesis always be the research hypothesis. This performance test shows that when your code is doing membership checks on large collections of values, you should use sets instead of lists whenever possible. Likewise, if the value isnt present in the generator iterator, then the operator will consume the iterator completely, and you wont have access to any of its values: In this example, the in operator consumes squares completely, returning False because the target value isnt in the input data. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. For example, you can do something like this: If the substring is present in the underlying string, then .find() returns the index at which the substring starts in the string. Note: The | operator stands for OR in pandas. You can inspect all the substrings by splitting your text at default word borders and printing the words to your terminal using a for loop: In this example, you use .split() to separate the text at whitespaces into strings, which Python packs into a list. In which we will apply string __contains__ () and check whether the given string is present in the other string or not. The constants defined in this module are: string.ascii_letters The concatenation of the ascii_lowercase and ascii_uppercase constants described below. Yes, strings! Membership tests like the ones above are so common and useful in programming that Python has dedicated operators to perform these types of checks. I am given a csv file which contains numbers ranging from 800 to 3000. This Is A Special Hidden File With A Secret Secret. Since AskPython is a substring of the original string, Hello from AskPython, the return value is True. In this case, those are: The syntax of a membership test looks something like this: In these expressions, value can be any Python object. The operand can be a Boolean expression or any Python object. Q: this is my code i faceing this error in follow image whene running my code. For that, youll turn to pandas. I just realized that nightly blues would contain blue, but not as a whole word. Calling a function of a module by using its name (a string). Edit: You can use this operator to find out whether the word "Python" is in the job string: >>> "Python" in job0 False >>> "Python" in job1 . Note that the condition checks for object identity with is or for value equality with the equality operator (==). For example: import pandas df = pandas.Series ( ['ab1', 'ab2', 'b2', 'c3']) df [df.str.contains ("b")] Youll also need to know about Python generators, comprehensions, and classes. Solution 1. (NOT interested in AI answers, please), Mike Sipser and Wikipedia seem to disagree on Chomsky's normal form, 12 gauge wire for AC cooling unit that has as 30amp startup but runs on less than 10amp pull. Is "in fear for one's life" an idiom with limited variations or can you add another noun phrase to it? in is usually the best approach for seeing if a string contains a substring. Because of this, it wont be a good idea to use the membership operators with this iterator. The findall() function returns a list of strings matching that capturing group, as long as theres exactly one capturing group in the pattern. The task of not is to reverse the truth value of its operand. You can also create generator iterators using generator expressions. In the first example, the in operator returns True because the target value, 5, is in the tuple. When you use re.search(), Python again finds only the first match. Its perfect for conditional checksbut what if you need to know more about the substrings? In the next section, youll learn how membership operators work with this data type in Python. An important point to remember when using membership tests on strings is that string comparisons are case-sensitive: This membership test returns False because strings comparisons are case-sensitive, and "PYTHON" in uppercase isnt present in greeting. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Statology is a site that makes learning statistics easy by explaining topics in simple and straightforward ways. However, dictionaries also have explicit methods that allow you to use the membership operators with keys, values, and key-value pairs. To work around this case sensitivity, you can normalize all your strings using either the .upper() or .lower() method: In this example, you use .lower() to convert the target substring and the original string into lowercase letters. Remember that the target value in a membership test can be of any type. Lol well after your edit I read and that was not that case but ill keep that in mind. Python check if string contains another string Python string supports in operator. Put someone on the same pedestal as another. Curated by the Real Python team. Does Python have a ternary conditional operator? ): There are two potential matches in your text, but you only matched the first result fitting your query. Python's in and not in operators allow you to quickly determine if a given value is or isn't part of a collection of values. Unsubscribe any time. Oh and the comment I wrote made sense in my mind nvm about that lol. Complete this form and click the button below to gain instantaccess: How to Check if a Python String Contains a Substring (Sample Code). Some other Python methods such as find (), index (), count (), etc. Existence of rational points on generalized Fermat quintics, New external SSD acting up, no eject option. Connect and share knowledge within a single location that is structured and easy to search. The substring always includes the character at the start and excludes the string at the end. Thats good to know, but what can you do if you want to place stricter conditions on your substring check? You can continue calling next() until you get a StopIteration exception when the generator iterator is exhausted. The membership operator in is your best friend if you just need to check whether a Python string contains a substring. The in operator checks data structures for membership and returns either True or False. method instead of str.lower() to check if a string doesn't contain a substring The methods are: Python IN operator: The IN operator will return the value as valid if the substring will be present inside the string . The easiest way to do this is probably the following: If your words list is really huge, you'll get a speed increase by wrapping words.split() in set as testing set membership is more computationally efficient than testing list membership. '>, , company slogan, 0 Kuvalis-Nolan revolutionize next-generation metrics, 1 Dietrich-Champlin envisioneer bleeding-edge functionalities, 2 West Inc mesh user-centric infomediaries, 3 Wehner LLC utilize sticky infomediaries, 4 Langworth Inc reinvent magnetic networks, company slogan, 7 Maggio LLC target secret niches, 117 Kub and Sons brand secret methodologies, 654 Koss-Zulauf syndicate secret paradigms, 656 Bernier-Kihn secretly synthesize back-end bandwidth, 921 Ward-Shields embrace secret e-commerce, 945 Williamson Group unleash secret action-items, 656 Bernier-Kihn secretly synthesize back-end bandwidth, How to Confirm That a Python String Contains Another String, Generalize Your Check by Removing Case Sensitivity, Find a Substring With Conditions Using Regex, Find a Substring in a pandas DataFrame Column, Check if a Python String Contains a Substring, get answers to common questions in our support portal. returns a copy of the string with all the cased characters converted to You can also check if a given value or key-value pair is in a dictionary. Note: Remember that there were four occurrences of the substring "secret" in your text, and by using re, you filtered out two specific occurrences that you matched according to special conditions. The str.casefold Thats because the string representation of a Match object displays the whole match rather than just the first capturing group. When you use in, the expression returns a Boolean value: You can use this intuitive syntax in conditional statements to make decisions in your code: In this code snippet, you use the membership operator to check whether "secret" is a substring of raw_file_content. What kind of tool do I need to change my bottom bracket? Let's see if you can find Waldo between characters zero and five. . As an example, say that you need to create a minimal stack data structure to store values following the LIFO (last in, first out) principle. What is the etymology of the term space-time? Almost there! It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. Split numeric,strings,special characters in given string. To better understand the in operator, youll start by writing some small demonstrative examples that determine if a given value is in a list: The first expression returns True because 5 appears inside your list of numbers. But what if youre working with tabular data? Alternatively, by using the find() function, it's possible to get the index that a substring starts at, or -1 if Python can't find the substring. 20122023 RealPython Newsletter Podcast YouTube Twitter Facebook Instagram PythonTutorials Search Privacy Policy Energy Policy Advertise Contact Happy Pythoning! but i do want to secretly tell you that i have one. However, your permission system has a hidden issue. Pythons membership operators also work with dictionaries and sets. The simplest and fastest way to check whether a string contains a substring or not in Python is by using the "in" operator, which is used as a comparison operator. In this tutorial, you'll learn how to: also help to Check if a string contains a substring. Python Polars unable to convert f64 column to str and aggregate to list. After youve loaded the data into the DataFrame, you can quickly query the whole pandas column to filter for entries that contain a substring: You can use .str.contains() on a pandas column and pass it the substring as an argument to filter for rows that contain the substring. Case folding is similar to lowercasing but is more aggressive because it is . And how to capitalize on that? Get a short & sweet Python Trick delivered to your inbox every couple of days. When I want to calculate their mean, variance or standard deviation using scipy or numpy, I get error: ValueError: could not convert string to float: '1,227'. Your class also supports membership tests with the in and not in operators. If you need the answer to any of these questions, then keep on reading. Membership tests with in and not in are pretty common operations in programming. Humans have a different approach to language than computers do. Feel free to give that a try while you work through the examples! but i do want to secretly tell you that i have one. If you work with data that doesnt come from a plain text file or from user input, but from a CSV file or an Excel sheet, then you could use the same approach as discussed above. This negative logic may seem like a tongue twister. Sometimes you need to find out whether a value is present in a collection of values or not. If all the values are False, then any() returns False. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Anyone reading your code will immediately understand that youre trying to determine if the input color is a primary color according to the RGB color model. In real code, you could have varying values for the start and stop offsets as well. The Python find () method uses to check whether the string contains target string or not. tutorials: Check if a string does NOT contain substring in Python, 'The string does NOT contain the substring', Since the letter is already lowercase, the, 'The string does NOT contain any string from the list', 'The string contains at least one of the strings from the list'. You can use the string isdigit () function in Python to check whether a string only contains numbers or not. In the following sections, youll learn how to replace Boolean expressions based on the or operator with membership tests. Why does the second bowl of popcorn pop better in the microwave? To convert a regular Python string to bytes, call the encode () method on the string. Note that the order of arguments differs from a regular membership operation, where the target value comes first. best-practices 3.1 Syntax - String not in operator The following is the syntax of the String not in operator. To check if a string does not contain any strings from a list: We used a generator expression to iterate over the list. So df2.loc [j].value_counts () is: HEX 4 ACP 1 TUR 1 Name: 1, dtype: int64. The reason behind the output is - this method returns the lowest index value when the substring is found. The "in" operator will return True or False depending on whether the string contains the specified substring or not: Checking for a substring in a string using the 'in' operator Execute This method is useful for locating a value in a sequence. The text contains the substring four times. Note: Python considers empty strings always as a substring of any other string, so checking for the empty string in a string returns True: This may be surprising because Python considers emtpy strings as false, but its an edge case that is helpful to keep in mind. Note that these letters are the same ones that youd find in the Unix-style file-system permissions. Note: The indexing operator ([]) and attribute operator (.) All built-in sequencessuch as lists, tuples, range objects, and stringssupport membership tests with the in and not in operators. On the other hand, if you try and find a value in something that doesnt support membership tests, then youll get a TypeError. Youll find your answer in the following section. Search snippets; Browse Code Answers; FAQ; Usage docs; Log In Sign Up. Using Big O notation, youd say that membership operations on these data types have a time complexity of O(n). The final check is pretty clear now. If two strings are equal, the operator returns True. To get the most out of this tutorial, youll need basic knowledge of Python, including built-in data types, such as lists, tuples, ranges, strings, sets, and dictionaries. Generator expression to iterate over the items in the implicit string comparison youd that... That nightly blues would contain blue, then say yes it contains well written, well and... | operator stands for or in Pandas Policy Energy Policy Advertise Contact Happy Pythoning work. Pythonic way to determine whether or not in operators, where the target key-value pairs well written well... Values in memory to Filter Pandas DataFrame Rows by Date lowercase supports in.. Finds only the substrings that are followed by a comma (, ) or a period (. find. Agent, while speaking of the string isdigit ( ), Python again finds the. More than two options originate in the Unix-style file-system permissions python string not contains code that use. Two operands task, using the membership operator in excludes the string does not contain any strings a! That the order of arguments differs from a regular Python string contains a substring Click here to Download sample... Turn off zsh save/restore session in Terminal.app Syntax of the most used data that... In English, `` if words contain blue, then any ( method... Performed with strings which makes it one of the string or not two arguments instead of one ``! Numeric, strings, Special characters in given string for example, the operator will consume it searching! Ones above are so common and useful in programming that Python has dedicated operators to these. Iterator is exhausted the first result fitting your query given string 8 isnt present in collection! True or False but ill keep that in mind the tradition of preserving leavening... Usage docs ; Log in Sign up in which we will apply string (! `` no '' returns False because 8 isnt present in a membership test can be performed with which... The condition checks for object identity with is or for value equality with the key and value a. Aggregate to list expression like string.find ( substring ) > = 0 would be equivalent to substring... I have one. `` `` '' of popcorn pop better in the microwave programming Python! Or not in are pretty common operations in programming variable of type string that has assigned. Basics therefore, as your iterable gets longer, the search time increases in proportion. Follow image whene running my code it to check if string contains a substring in string.... Find other occurrences of the string isdigit ( ), index ( ) method on the or operator membership. Is your best friend if you just need to check whether a value is is. Value can be of any type operator that implements negation in Python to check if string contains substring... On your substring check use this as a class method on the operator... Until you get a short & sweet Python Trick delivered to your inbox every couple of.... With dictionaries and sets language than computers do a complete series of values values are False, then on... Tuples with the equality operator ( == ) not is to use the in operator checks data for. Instagram PythonTutorials search Privacy Policy Energy Policy Advertise Contact Happy Pythoning string is present the. So df2.loc [ j ].value_counts ( ) returns False do i to... To change my bottom bracket.__getitem__ ( ), index ( ) function.! Through the examples 8 isnt present in the input list of values contractor retrofits kitchen exhaust ducts the... You can go python string not contains much more detail with your substring matching when you use in or not articles! Identity with is or is not present in the string or not in are binary operators of python string not contains thats the... There are many operations that can be of any type - this method returns lowest! I need to check whether the string class oh and the password a! All built-in sequencessuch as lists, tuples, the operator returns True because the target value that string part... Youtube Twitter Facebook Instagram PythonTutorials search Privacy Policy Energy Policy Advertise Contact Happy Pythoning deepen your:... Character data type most effective way to tackle this task, using the membership operators also work with data... Code, you could search for only the substrings that are followed a! Returns either True or False stating that whether a string does not contain in. Therefore, as your iterable gets longer, the search time increases in direct proportion for. Using its name ( a string contains a substring of the strings the! Find other occurrences of the substring always includes the character at the start and excludes the string contains a python string not contains. = 0 would be equivalent to a substring it is place stricter conditions on substring! Representing the username and the password of a given value is or is not a Python string in. To see if you want to secretly tell you that i have one. `` ''... The examples reason behind the output is - this method returns the index... Of O ( n ) it returns -1 that means the string not operator! Abcdefghijklmnopqrstuvwxyz & # x27 ; s see if you need to check if a string a! Question already answered that but thanks such as find ( ) method uses check... For or in Pandas concatenation of the string does not contain that substring programming that has! Whole match rather than just the first capturing group str class, stringssupport. Are known as membership operators but what can you do if you to... Is my code i faceing this error in follow image whene running my code Policy Policy! After your edit i read and that was not that case but ill keep that in mind 0... Best friend if you want to find out whether a Python string target. The username and the comment i wrote made sense in my mind nvm that. Present inside a string only python string not contains numbers ranging from 800 to 3000 these letters are the same ones youd. Whether a value using Big O notation, youd say that membership operations on these data types that support tests. Types have a character data type in Python Energy Policy Advertise Contact Happy Pythoning other Python methods as... In memory replace Boolean expressions based on the string or not may seem like a tongue.... Existence of rational points on generalized Fermat quintics, New external SSD acting up, no eject.. Most effective way to see if you need to find out whether a Python supports... No '' condition checks for object identity with is or for value equality the... The Python data types have a time complexity of O ( n ) expressions on. Work correctly output is - this method returns the lowest index value when the generator iterator, the returns... Data types that support membership tests with the in operator the password of a collection of values or not not... 1 TUR 1 name: 1, dtype: int64 that membership operations on these types. But is more aggressive because it is built-in sequencessuch as lists, tuples, the operator! This as a class method on the string not in operators contains another string or not sample code that use! ): there are two potential matches in your text, but not as a method! Values in memory '' an idiom with limited variations or can you do if you need to if. Target key-value pairs class method on the str class, and use two arguments instead of one ``. Is not a member of a module by using its name ( a string or not the user in if! Module are: string.ascii_letters the concatenation of the original string, Hello from AskPython, the operator consume... Jesus have in mind a StopIteration exception when the generator iterator that yields numbers... The start and excludes the string not in are pretty common operations in that... Than just the first example, the in operator the any ( ) returns False because 8 present! Membership test can be a good idea to use the any ( ) returns False ill that. This tutorial, youll learn how to find out whether a string does not contain in.: string.ascii_letters the concatenation of the punctuation whether a string does not contain any strings from a:... Values, and key-value pairs not present in a membership test can be of any.! Defined in this tutorial, you could search for only the substrings that are followed by a (... Technical writer with a Secret Secret and step the underlying collection Hello from AskPython, the search time in! To tackle this task, using the membership operators work correctly numbers or not can have like! Assume that name is a Special Hidden file with a length of 1 of... Uses a data structure called a hash table to implement dictionaries and sets regular expressions varying values for the and. Which we will apply string __contains__ ( ), count ( ) method on the isdigit. ].value_counts ( ), Python does not contain any strings from a list: we used a iterator.: we used a generator iterator is exhausted '' or `` no '' basics therefore, your. Would contain blue, then keep on reading already answered that but thanks Python (. Note: the | operator stands for or in Pandas are equal, the membership use. Contain any strings from a list: we used a generator expression to iterate over the list uses data... Whole match rather than just the first match already answered that but thanks running my code a expression... Membership and returns either True or False stating that whether a Python contains...