Examples of valid and invalid variable names in python. 8+, with the walrus operator): def get_input(.

For example, if you want a variable named "two words", it should be written as two_words, twowords, TwoWords, twoWords, or Twowords. You may use uppercase letters for variable names but it is always perfectly fine to begin variable names with a lowercase letter. Use underscore characters (an underscore is the _ character) If we name our variables like this, we won’t have any problems: >>> my_variable = 6 >>> string6 = 7 >>> YourVariable Jul 5, 2001 · Note that there is a separate convention for builtin names: most builtin names are single words (or two words run together), with the CapWords convention used only for exception names and builtin constants. A Python variable must only contain uppercase and lowercase letters ( A–Z a–z), digits ( 0 – 9), and the underscore character ( _). But variable names can be more verbose. So, NAME, name, nAME, and nAmE are treated as different variable names. Below is an example of assigning 'x' as an Integer and printing the object properties. Variable names are case-sensitive. We do not need to declare variables before using them or declare their type. Valid Variables in Python. Invalid variable :- if , total marks, S. Table 1-3: Valid and Invalid Variable Names Nov 8, 2022 · Checkout the below provided is_pyname(s) function able to determine whether a string is a valid variable name in Python 3 using three methods: if method == 'regex' or method is None: import regex. Feb 15, 2023 · Here we have some examples of valid and invalid identifiers in python. Example– Valid variable names-_name, id Apr 25, 2014 · prompting the user for input with get_input until the input is ok. Jun 2, 2021 · Here is an example of invalid variable name in Python: I hope the above article is useful and help you in understanding the concept of valid variable names in Python. Valid Identifiers These are examples of valid identifiers in python. a1, list1, first_name, f_n, last_name, l_n, first_11, _a, x, y, Student_name, Roll_NO. This is better: # line 6. You can use the built in func: str. 2 Digits are the ASCII characters 0-9. 1 Letters are the ASCII characters A-Z and a-z. Aug 13, 2023 · Avoid Python Keywords. It allows you to create variable-length and mutable sequences of objects. The variables The list of protected keywords has changed with each new version of Python. Use consistent standards throughout a project to minimize the cognitive burden of small decisions. Python Variable Naming Rules. 8+, with the walrus operator): def get_input(. So far, I've got a check that looks like this: return keyword. this process is known as variable assignment, which can be done using the equals sign "=" (also known as the assignment Mar 17, 2018 · name = unicodedata. It is recommended to use underscores (_) as a substitute. Mar 22, 2023 · Variable naming rules. Here are a few examples of variables which are valid in python. Sep 30, 2019 · Advertisements. Feb 14, 2022 · You can not start a Python variable with a number. name1. def check_names(infile): #this will Nov 28, 2016 · Just to further complicate things, you are not guaranteed to get a valid filename just by removing invalid characters. Variable Naming Convention. 6 you could use await as a variable name or function name, but as of Python 3. Jun 20, 2022 · Variable names are case- sensitive. Which of the following is a valid variable name in Python? A Computer Science portal for geeks. Feb 21, 2017 · I have a script that generates Python classes from a Jinja template (Django models to be precise) and I'd like to fix any field names that are unsuitable for reasons like the ones I mentioned above. string, integer, floating point number), and Value. For variables, we suggest that you use lowercase for short variable names and lower_case_with_underscores for longer and more descriptive variable names. Jan 25, 2022 · Python is an object-oriented programming language. They are each equal to the value of 0. TA-DA ! invalid. isidentifier() in combination with filter() . Invalid Python Variables Names. let a1 = 1; // valid. These topics will take you through several interesting and useful examples that showcase the power of Python’s assignment statements. An identifier should start with either an alphabet (lower or upper case) or underscore (_). bashrc after logging in the other machine, in order to define the proper Nov 4, 2022 · Names must contain a sequence of letters, digits, or underscores. 9abc: variable name can’t start with a number. join to convert the array to a string again. During this time I got expertise in various Python libraries also like Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… for various clients in the United States, Canada, the United Nov 17, 2021 · Clear Variable Names in 3 Steps. For example, top_five_members, var_1 etc. Feb 7, 2015 · Get input from user by raw_input() (Python 2) or input() (Python 3). The first character in variable's name cannot be a number. There are a few rules to follow when naming variables in Python: Variable names can only contain letters, numbers, and underscores. 13Variable: Variable name can only start with a character or underscore. Sep 6, 2023 · In C programming language, identifiers are the building blocks of a program. 8. Example, first_name and FIRST_NAME are different variables. e. Python is a case-sensitive language. yourname It contains only lowercase alphabets. Oct 27, 2023 · colors = [‘red‘, ‘orange‘, ‘yellow‘] According to surveys, around 20% of Python syntax errors are due to missing commas, colons or semicolons. Unlike some other programming languages, Python does not require explicit declaration of variables or specifying their data types. Underscores can be used in the module name if it improves readability. ; Type of variable name is string, so we have to use string method to valid user enter string. 0. Consist of both lowercase and uppercase letters. For example, continue = 'Python' The above code is wrong because we have used continue as a variable name. You can also mix objects of different types within the same list, although list elements often share the same type. It can use only letters, numbers, and the underscore (_) character. g. Aug 13, 2023 · Naming Rules for Python Identifiers. Reason : if: "if" is a reserved keyword in Python and cannot be used as a variable name. This is used to make a variable more unique in the context of class inheritance. The rest of the variable name can contain a number. Aug 14, 2023 · While you can shadow built-in names in Python, you probably should avoid it when possible. You may want to add special handling for the cases where: Apr 29, 2024 · Variable names in Python must start with a letter or underscore and can be followed by letters, numbers, or underscores. args. org' # valid 1password = True # invalid Variable naming conventions Here, language is a variable (an identifier) which holds the value 'Python'. iskeyword(name): return False # The identifier syntax is <XID_Start> <XID_Continue>*. Python is not “statically typed”. Pay special attention to use them properly. You can name a variable anything as long as it obeys the following three rules: It can be only one word with no spaces. Example: Valid: _color12, color12_, color_12 Invalid: 1color. Other special In Python, variables are declared by simply assigning a value to them. So, Square and square are two different variables though they have the same name . is_name_by_regex = False. Invalid examples: 1variable, user-name, #price. Rules for Python variables: A variable name must start with a letter or the underscore character. # Correct variable name variable_name1 = "valid" # Syntax Error: Invalid variable name 1_variable_name = "invalid". There are some rules to assign a name to the variable. Variable names cannot be a reserved keywords in Python. Variable names are case-sensitive, so “myVar” and “myvar” are two different variables. In fact, it is usually beneficial if they are because it makes the purpose of the variable more evident at first glance. These words are reserved in Python: 1 and del from None True 2 as elif global nonlocal try 3 assert else if not while 4 break except import or with 5 class False in pass yield 6 continue finally is raise 7 def for lambda return python. 6. Jan 26, 2021 · In this Python article, we will discuss Keywords, Identifiers, rules to create identifiers and will also implement some examples. print(y[0]) # this line will fail. A python variable name cannot start with a number. A variable name cannot start with a number. Character Set. But certain variable names are considered illegal or invalid in most programming languages. Python has a few important naming conventions that are based on using either a single or double underscore character ( _ ). Missing Colon on if/else/while/def. While it’s possible to use this to get the variable name assigned to a tuple slot, the slot for var2 will return a variable name of var1. public void ThisIsMyMethod() In Python, I have seen the above but I have also seen snake_case being used: # python example. random variables How should I understand "mit" in this sentence? Zugzwang where the side to move must be mated in exactly 2 moves Jun 3, 2023 · Python naming conventions are a set of guidelines established in PEP8, Python’s official style guide. For exampe, 9pay and 2count is invalid variable name. The variable names must always begin with either a letter or an underscore and not digits. It can’t begin with a number. Similarly, 'class' cannot be considered as a valid variable because it is a reserved keyword while 'Class' is a valid variable. There are two possible approaches. Sort variable names into valid and invalid categories Learn with flashcards, games, and more — for free. Python’s list is a flexible, versatile, powerful, and popular built-in data type. In addition, add a statement that prints out the __name__ variable to the screen: Feb 10, 2018 · Here I lost track of what names was and scrolling up will make me lose track of even more. While i_am_variable, variable, variable1, _variable, are all valid A variable name have allowed characters, which are a-z, A-Z, 0-9 and underscore (_) A variable name should begin with an alphabet or underscore; A variable name should not be a keyword; A variable name cannot contain spaces. I'm not sure what you're trying to get into your results array, but you need to get rid of [y[1] for y in y Data13Record: Variables can contain digits. We can’t name our variable, function, or other entity using these keywords. A Python variable is a name given to a memory location. Java keywords cannot be used as variable Oct 3, 2012 · For Python 2, easiest possible way to check if given string is valid Python identifier is to let Python parse it itself. it needs to differentiate between something like "c:/users/username/" and "c:/users/username/img. Be a reserved keyword. Variables that begin with an underscore are treated exactly the same as any Apr 15, 2024 · Python Variable is containers that store values. Words are separated by underscores. x-y: the only special character allowed in the variable name is an underscore. Things to Remember. Hence i-am-variable, variable!, 1variable, #variable, are all invalid variable names. This post dives deep into the rules, conventions, and best practices for naming variables in Python, offering examples and tips to avoid common pitfalls. validating using a validator function that can be passed to get_input. Take for example two variables assigned the value of 0 and they’re assigned to a tuple, ie t = (var1, var2). Those are keywords or reserved words. The syntax consists of the variable name followed by a colon (:) and the variable type: A variable name starting with two underscores (__variable) undergoes name mangling. The variable name must start with an alphabet or underscore. all are valid example. Since allowed characters differ on different filenames, a conservative approach could end up turning a valid name into an invalid one. Variable names should be kept as short and concise as possible, while also clearly indicating the kind of data or information contained in the variable We would like to show you a description here but the site won’t allow us. First, create a new module called billing that has two functions: calculate_tax() and print_billing_doc(). names = ['John', 'Jane'] # I encapsulate part of the logic in another function to keep scope short. Uppercase and lowercase characters are distinct. When writing code, one of the first steps is naming your variables. Python keywords like Boolean True, and, or, and if, etc. Here are some examples of invalid variables: finally: This is a keyword. I have also run this command : source ~/. In the below example “section” is an identifier assigned to the string type value. 3. For example, valid variable names are myvar, var1, and _var_with_an_underscore. Variable names can contain only alphanumeric characters and underscores (A-z, 0-9, and _). i. Each Python object has defining properties including the Identity (a memory address), Type (e. Variable names in Python are case sensitive. A variable's name can be any legal identifier — an unlimited-length sequence of Unicode letters and digits, beginning with a letter, the dollar sign "$", or the underscore character "". , ‘firstname’, ‘Firstname’, ‘FirstName’, and ‘FIRSTNAME’ are Dec 7, 2023 · Creating and Initializing Variables in Python. let 1a = 1; // invalid. Jul 19, 2019 · For example pay is better than _pay. >>> var1 = 1 >>> print(var1) 1 More points to remember while deciding a variable name. Examples of Valid And Invalid Variable Names in JavaScript When you call [y for y in test] you are iterating over the values already, so you get a single value in y. jpg". 9. Contain special characters (except for underscore). From the java documentation: Variable names are case-sensitive. In is a variable name depends on the variable names also create another game sure you might research the following general term for different casing are of valid and examples invalid variable names given a set. Mar 25, 2021 · Yes, you are right this program will work completely fine without the is_valid variable. For the naming One place where Unicode identifiers will be nice is in iPython Notebook, because you can have variable names that are named the same as the variables they represent. But pay9 and count1 are valid variable names in Python. Python I've been working on your function for some time and was trying to add some features to it but failed:( For example function gives the first wrong letter that does not belong to the list and I've wanted it to iterate over each letter saying " 'h' at position 4 is invalid " and should do the same for each next invalid letter so I set i=0 then Jul 9, 2013 · This other function will handle all of the directory creation (if necessary). While c = 10 is a valid name, writing count = 10 would make more sense, and it would be easier to figure out what it represents when you look at your code after a long gap. However, if you import a file as a module, Python sets the module name to the __name__ variable. Name_school It contains only ‘_’ as a special character. For example, you may consider to define a variable name as ‘a1’ instead of ‘1a’. variable@me: Variables name can only use digits( 0-9 ) and characters. Variable names may not be a reserved But, there are some rules around creating a legal variable (a name we’re allowed to use). valid. Fastest is to use ast , and check if AST of single expression is of desired shape: Variables in python have either side and examples invalid variable of names valid. Programmers generally choose names for their variables that are meaningful and document what the variable is used for. The rules are: Allowed characters are a-z, A-Z, underline and 0-9 but (here it comes) not as first character. For example, myVar, MyVar, _myVar, MyVar123 are valid variable names, but m*var, my-var, 1myVar are invalid variable names. It is the basic unit of storage in a program. Names of type variables introduced in PEP 484 should normally use CapWords preferring short names: T, AnyStr, Num. For example, 1var is wrong. For convenience, builtin exception types define __str__() to print all the arguments without explicitly accessing . Contain the underscore (_). x = some_function() y = maybe_a_second_function(x) # line 13. , #tag, tag$, 9a. This requires no imports such as re and works by iterating over each character and returning it if its an identifier. datetime(year, month, day) correctDate = True except ValueError: correctDate = False return correctDate #handles obvious problems print(str(check_date(2008,11,42))) #handles leap days print(str(check_date(2016,2,29 Jan 1, 2021 · In addition to having meaningful variable names, the names have to first and foremost be valid. prompt="Enter a value: ", validator=lambda x: True, error_message="Invalid input. Dec 7, 2014 · 5. Identifiers must not conflict with default Python keywords and reserved words. Valid examples: my_var, count_1, totalAmount. Keywords. Either lowercase or uppercase letters are acceptable. Invalid Variables in Python Apr 5, 2024 · I am Bijay Kumar, a Microsoft MVP in SharePoint. >>> 1var = 1 File "<stdin>", line 1 1var = 1 ^ SyntaxError: invalid syntax But var1 is fine. Variable names cannot start with a number. A variable name can consist of Capital letters A-Z, lowercase letters a-z digits 0-9, and two special characters such as _ underscore and $ dollar sign. It is legal to use uppercase letters, but it is a good idea to begin Just have Python do its own check by making a dictionary with the variable holding the name as the key and splatting it as keyword arguments: def _dummy_function(**kwargs): pass. iskeyword(name) or name in dir(__builtins__) Effective variable naming enhances code readability and maintainability. Then you just do a ''. Python also has dozens of built-in functions that you should also avoid using as variable names when possible. They can contain both letters and numbers, but they cannot start with a number. In this example, all three of the variables ( x, y, and z) are assigned to the same memory location. Aug 13, 2023 · This article explains the syntax restrictions, naming conventions, and readability best practices that can make a variable name invalid in languages like Python, JavaScript, C# and more. They are used to uniquely identify the entity within the program. roll_2 It starts with lowercase and ends with a Nov 29, 2023 · Remove ads. Your code is the same as trying to do the following: y_test = [1, 2, 3] y = y_test[0] # y = 1. Python also allows you to assign several values to Jan 25, 2018 · Bounds on hitting time of sum of i. In many programming languages, variables that begin with an underscore are private. We can also use the unicode escape sequences in identifiers as characters. Here are some examples of valid and invalid variable names in Python: Sep 25, 2015 · This function will check if a name is a keyword in Python or one of Python built-in objects, which can be a function, a constant, a type or an exception class. In a list, you can store objects of any type. Which of the following is true for variable names in Python? a) unlimited length. ; Use isalpha() string method to check user entered string is valid or not. Variable names can only contain letters, numbers, and underscores. user_age = 20 # valid website = 'https://freecodecamp. These guidelines set the standard for how we name variables, functions, classes, modules, and other identifiers. More than one alpha-numeric characters or underscore may May 24, 2019 · A Python identifier is a name used as a variable name to enhance the readability and understanding of the code. Variable names may: Use upper-case and lower-case letters. I believe this is because constants are pre Jun 3, 2023 · Answer :-. 2. For example, mean, new_sum, Square and so on. For example, in Python 3. The only exception is a $ (dollar symbol) and 5 days ago · The except clause may specify a variable after the exception name. this_is_my_variable = 'a'. Variable Naming Rules. Variables must begin with a letter (A-z) or underscore (_). A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ) Apr 26, 2019 · The rest of the identifier name can consist of letters (upper or lowercase), underscores ('_') or digits (0-9). When writing your code, prioritize ease of reading over speed of writing. def: invalid variable name because it’s a reserved keyword. Use an underscore to combine two words in the variable name, like first_name and emp_pay. A variable name can consist of numbers from 0-9, alphabets (lowercase and uppercase), and the underscore character. space ship. d) none of the mentioned. Consist of digits. Thus, an identifier must have its first character, either a letter, digit, or underscore. Variable names in Python can include letters (both uppercase and lowercase), digits, and the underscore character (_). You can only include a-z, A-Z, _, and 0-9 in your variable names. Let’s first take a look at a few examples-Examples:-Valid: _abc, Abc1, aBc2_d, a234_bC; Invalid: 2abc, ab cd, 3444, #gh, ab&cd; Points to remember-You cannot use reserved keywords as an identifier name. Type Variable Names. normalize( 'NFKC', name ) # check if it's a keyword if keyword. In Python, variable names must follow specific rules to be valid. Variable names can only contain letters, numbers, and underscores, and they cannot start with a number. # ^-- regex supports \p{L} and \p{N} which match. x =2 # create variable 'x'. These conventions allow you to differentiate between public and non-public names in APIs, write safe classes for subclassing purposes, avoid name clashes, and more. This is not true in Ansible. View Answer. To learn more about variables, visit Python Variables. For example, _avg, sum, num1 and so on are valid variable names but 1num is invalid. Variable names cannot begin with a number. Keywords are the pre-defined words having special meaning to the language compiler. Variables in Python are case-sensitive, meaning example1 and Example1 are treated as separate variables. A list of C reserved words can be found at Table 1-3 has examples of legal variable names. 7, that word has been added to the keyword list. Variable Names. For example, myname and myName are not the same. 5. What are valid python identifiers - An identifier in a Python program is name given to various elements in it, such as keyword, variable, function, class, module, package etc. iskeyword(name) or (name in ["type"]) Example– 'name' and 'Name' will be treated as different variables in Python. Variable Names are case-sensitive. Variable names can begin with an underscore. We cannot use keywords as variable names as they are reserved names that are built-in to Python. A variable name can also have most of ISO 8859-1/ Unicode Letters that include å & ü. Here are some examples of valid and invalid variable names in Python Feb 2, 2024 · A variable name can’t start with a number, but the subsequent characters can be digits (0-9). the variable's data type is inferred based on the value assigned to it. i. A variable name should describe the entity the variable represents. I. b) all private members must have leading and trailing underscores. In Python, a variable cannot: Start with a digit. The variable is bound to the exception instance which typically has an args attribute that stores the arguments. # Sure I can lookup names, it is right above. For example, the variable representing a chip's thermal impedance from junction to ambient is θJA, and constantly writing it as THETA_JA makes it harder for non-programmers to Feb 20, 2011 · let's assume I have this variable name: $$5Var#_#Name#1!! Now I want to delete the invalid characters (in bold). Always give the identifiers a name that makes sense. Note the lowercase n in the former and the uppercase N in te latter. Variable names can be arbitrarily long. The examples you have seen so far have used short, terse variable names like m and n. def is_valid_variable_name(name): try: _dummy_function(**{name: None}) return True. Variable names cannot contain spaces or special characters. c) underscore and ampersand are the only two special characters allowed. The variable name can consist of alphabet(s), number(s) and underscore(s) only. Annotated Assignment Statements. You must only begin a variable name with a letter or an underscore. Another example – forgetting the colon on if, else, while, def statements: if x > 0. Examples of valid identifier names are i, __my_name, name_23 and a1b2_c3. Mar 2, 2016 · I am running my python script in another machine by using ssh command in linux. Oct 12, 2020 · When we create variables in Python, we must consider the following rules: A variable name must start with a letter or underscore; A variable name cannot start with a number; A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ ) Variable names are case-sensitive (date, Date and DATE are three different View Answer. Variable names cannot contain special characters. Different Methods for Declaring Variables in Python What is a valid identifier in Python. Identifiers are unique names that are assigned to variables, structs, functions, and other entities. There are some important rules to follow when naming identifiers in Python: Can contain alphanumeric letters (a-z, A-Z) and underscores (_) Cannot start with a digit (0-9) Case sensitive (myvar and MyVar are different identifiers) Cannot be a Python keyword (for, while, class etc) Modules should have short, all-lowercase names. Jun 15, 2023 · Variable names cannot contain blank spaces. Therefore my bp only needs to check if an input string could be a valid directory, OR a valid file, OR (some other thing). Identifiers can contain all the letters (Small, upper both), all the digits from 0 to 9, and underscore. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. For example, 0x is an invalid variable name, but x0 and _0x are considered valid. Name your variables carefully. Aug 20, 2021 · Through multiple assignment, you can set the variables x, y, and z to the value of the integer 0: x = y = z = 0 print(x) print(y) print(z) Output. Variable names must start with a letter or an underscore _ character. But to ensure that the user type either r or w we can use this is_valid variable using a while loop as follows 2. Examples for valid variable names. A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume). Python keywords or playbook keywords are not valid variable names. You can only use letters, numbers, and underscores. , cannot be used as variable names. It is used for conditional statements. However, the name cannot begin with a digit. Jan 12, 2024 · 1. 1. And here are some examples of invalid variable names in Python: 1x # Cannot Coming from a C# background the naming convention for variables and methods are usually either camelCase or PascalCase: // C# example. In this tutorial, we have learned the rules of naming identifiers with examples of valid and invalid identifiers, which you must definitely keep in mind while writing identifiers on your program. They can’t start with numbers or contain special characters. Use numbers. s1 = 'name/with/slashes'. invalid. Blank spaces cannot be used in variable names. If your Variable name is long, then you can use underscore character (_) in the name. This means, Variable and variable are not the same. 123: variable name can’t contain only numbers. s2 = 'name '. Your variable name must contain only uppercase (A-Z), lowercase (a-z) or underscore (_). Variable names and keywords ¶. Variable names must begin with a letter from A-Z or the underscore _ character. Identifier names are case-sensitive. A variable name cannot begin with a number. More details can be found here. Python keywords are case sensitive. import keyword def is_keyword_or_builtin(name): return keyword. The first character must not be a digit. Reserved Words. Jan 29, 2024 · AGR*3200 – Computing for Bioscientists Exercise 5 [25 marks] Fix the Python script Jane Hackerton participated in a programming competition and wrote a Python function (provided below) that was supposed to calculate the average, minimum value, and maximum value of a list of numbers. You cannot use Python keywords and built-in identifiers as variable names. Here are the rules. string thisIsMyVariable = "a". d. The convention, however, is to always begin your variable names with a letter, not "$" or " ". Sep 26, 2018 · Python allows you to name variables to your liking, as long as the names follow these rules: Variable names may contain letters, digits (0-9) or the underscore character _. Aug 25, 2013 · Ok, there appears to be some drawbacks with this. name; age; _name; first_name; quantity; Examples for invalid variable names: @name variable name cannot contain special characters So, variable1 is valid while 1variable is a invalid name. >>> Apr 3, 2012 · You can try using datetime and handle the exceptions to decide valid/invalid date: import datetime def check_date(year, month, day): correctDate = None try: newDate = datetime. Sep 16, 2020 · Best Practices Variable Names In Python. In Python, a variable name can: Contain as many characters as you want. Python __name__ variable example. A variable is created the moment we first assign a value to it. It can be kept as simple as (Python 3. Apart from SharePoint, I started working on Python, Machine learning, and artificial intelligence for the last 5 years. except TypeError: A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume). # ^-- Unicode chars considered to be Letters and Numbers. Here are some valid and invalid variable name examples: May 27, 2019 · Invalid Python Variable Examples. total marks: Variable names cannot contain space (" ") as it is not valid character. Dec 30, 2022 · Here are some examples of valid variable names in Python: x my_variable student_name studentName _private_variable. – Variable names are case-sensitive (e. They cannot commence with a digit (0-9). Python has about three dozen names that cannot be used as valid variable names. Id1 Here, the numeric digit comes at the end. Jun 15, 2022 · data _type variable_name = value; Rules to Declare a Variable . PEP 526 introduced a dedicated syntax for variable annotation back in Python 3. Apr 29, 2019 · let let = ‘do not use let as keyword’ // invalid variable name. While these conventions are not enforced by the Python interpreter, adhering to them is considered a mark of good coding practice. Python packages should also have short, all-lowercase names, although the use of underscores is discouraged. hl qb ta yl fv bb wf bj gc lt