Examples of valid and invalid variable names in python. com/edzjk4d/erpnext-modules-list.

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