Nameerror name - 0. You should insert a cell just before your present code cell and then type the following code. from sklearn.base import BaseEstimator, TransformerMixin. class DataFrameSelector (BaseEstimator, TransformerMixin): def __init__ (self, attribute_names): self.attribute_names = attribute_names def fit (self, X, y=None): return self def transform ...

 
NameError: name '_mysql' is not defined after setting change to mysql 3 Django connect mysql problem, NameError: name '_mysql' is not defined. Wpm

The Python "NameError: name 'plt' is not defined" occurs when we use the pyplot module without importing it first. To solve the error, install matplotlib and import plt (import matplotlib.pyplot as plt) before using it. Open your terminal in your project's root directory and install the matplotlib module. shell.Using this code in my website update tool, I receive a NameError: name 'new_link1' is not defined. However I use the name new_link in my code, not new_link1. I am using Jupyter notebooks with some other notebooks running similar code if that might be having an effect. My code is below.Aug 30, 2021 · I though removing the SELF would have resolved the issue quicker and cleaner, although at this stage I dont really care if the SELF is there or not. In that case how would I define 1) "self._request" 2) def _request (self, method, uri, timeout=5, auth=True, params=None) – hdsouza. Sep 2, 2021 at 14:00. Add a comment. 0. You should insert a cell just before your present code cell and then type the following code. from sklearn.base import BaseEstimator, TransformerMixin. class DataFrameSelector (BaseEstimator, TransformerMixin): def __init__ (self, attribute_names): self.attribute_names = attribute_names def fit (self, X, y=None): return self def transform ... Firstly, maybe your df object is not global variable. If so, you may pass df as an argument to the function. For the syntax, your access to the index should be .index [0] rather than .index (0). A more compact solution is return str (df ['Gold'].idxmax ()). @jezrael Thanks for suggestion.Solution: NameError: Name ‘Spark’ is not Defined in PySpark. Since Spark 2.0 'spark' is a SparkSession object that is by default created upfront and available in Spark shell, PySpark shell, and in Databricks however, if you are writing a Spark/PySpark program in .py file, you need to explicitly create SparkSession object by using builder to resolve NameError: Name 'Spark' is not Defined. Note that you never converted the file contents from a string to an integer, so stu may well be set to the '0' or '1' string. You probably want to convert the string to an integer: with open ("C:/Users/"+ user +"/setting.txt", 'r'): try: stu = int (f.read ()) except ValueError: stu = 0.You should use raw_input because you are using python-2.7. When you use input () on a variable (for example: s = input ('Name: ') ), it will execute the command ON the Python environment without saving what you wrote on the variable ( s) and create an error if what you wrote is not defined.Mar 20, 2016 · However, you can remove the unicode () call altogether; open () produces a file object that already decodes data to Unicode for you. You probably want to tell it what codec to use, explicitly: fileMain = open ("dictionary_15k.txt", "r", encoding="utf-8") for line1 in fileMain: dictWords.append (line1.strip ()) You may want to switch to Python 2 ... Nov 16, 2015 · So then you'd just want to do: try: a = input () control (a, x, y, z, k) That way, 'a' is initialized before you run the control function. You need to assign values not just to the variable a but also to other variables x, y, z, and k which you're passing here -> control (a, x, y, z, k) # for example: a= 'ADDITION' x= 1 y= 2 z=3 k=4 # and then ... To fix this error, you can either access pandas using the name that you have used in the import statement or import pandas without an alias. import pandas as pd. # create a dataframe. df = pd.DataFrame( {. 'Name': ['Jim', 'Pam', 'Dwight'], 'Age': [25, 26, 28] }) # display the dataframe.NameError: name 'db' is not defined. Ask Question Asked 3 years, 3 months ago. Modified 3 years, 3 months ago. Viewed 3k times 0 I've made a simple code using python ... Feb 1, 2023 · To solve the error, we have to import the random module. main.py. # import random module first import random n1 = random.randint(1, 10) print(n1) s1 = random.choice(['a', 'b', 'c']) print(s1) Even though the random module is in the Python standard library, we still have to import it before using it. Make sure you haven't used a capital letter r ... Solution: NameError: Name ‘Spark’ is not Defined in PySpark. Since Spark 2.0 'spark' is a SparkSession object that is by default created upfront and available in Spark shell, PySpark shell, and in Databricks however, if you are writing a Spark/PySpark program in .py file, you need to explicitly create SparkSession object by using builder to resolve NameError: Name 'Spark' is not Defined. try: # Python 2 forward compatibility range = xrange except NameError: pass # Python 2 code transformed from range (...) -> list (range (...)) and # xrange (...) -> range (...). The latter is preferable for codebases that want to aim to be Python 3 compatible only in the long run, it is easier to then just use Python 3 syntax whenever possible ...Jun 27, 2022 · addTWoNumbers() # NameError: name 'addTWoNumbers' is not defined In the code above, we called a function – addTWoNumbers() – that was yet to be defined in the program. To fix this, you can create the function if you need it or just get rid of the function if it is irrelevant. See full list on careerkarma.com Reason of the “NameError: name ‘request’ is not defined” in Python. The request is a protocol known as the interaction between the client and server. When talking about the request, we are talking about the HTML request. In the Python programming language, NameError: name ‘request’ is not defined occurs when working with Flask or ...Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsJul 27, 2022 · 今回はPythonのNameErrorについて解説します。 1. NameErrorとは 2. NameErrorの対応方法 3. まとめ 関連記事 1. NameErrorとは NameErrorはPythonの組み込み例外の1つで、「名前が見つからなかった」というエラーです。 このエラーは、変数や関数などを参照した… if i use 'print' in fist cell, i can see the data from 'data_df'. the problem is when i wolf like use in another cell into jupyterlab. – Carlos. Feb 2 at 21:16. 1. 'NameError: name 'data_df ' is not defined'. Note the extra space after data_df in that message. Maybe you put an extra space in the cell with the code that plots the graphics?Aug 30, 2021 · I though removing the SELF would have resolved the issue quicker and cleaner, although at this stage I dont really care if the SELF is there or not. In that case how would I define 1) "self._request" 2) def _request (self, method, uri, timeout=5, auth=True, params=None) – hdsouza. Sep 2, 2021 at 14:00. Add a comment. So then you'd just want to do: try: a = input () control (a, x, y, z, k) That way, 'a' is initialized before you run the control function. You need to assign values not just to the variable a but also to other variables x, y, z, and k which you're passing here -> control (a, x, y, z, k) # for example: a= 'ADDITION' x= 1 y= 2 z=3 k=4 # and then ...Reason of the “NameError: name ‘request’ is not defined” in Python. The request is a protocol known as the interaction between the client and server. When talking about the request, we are talking about the HTML request. In the Python programming language, NameError: name ‘request’ is not defined occurs when working with Flask or ...Feb 1, 2023 · # NameError: name 'X' is not defined in Python. The Python "NameError: name is not defined" occurs when we try to access a variable or a function that is not defined or before it is defined. To solve the error, make sure you haven't misspelled the variable's name and access it after it has been declared. Jan 26, 2020 · 1. It has has to do with how you imported the json module. By using the * notation, you are importing everything in the json module. When importing a module in this way, you do not need to specify the module a function came from. When importing, you have two options, import the module (and reference the module name when using it), or import ... 2. TLDR; use this command=app.destroy instead of this command=quito. quit is not defined occurs because the function quito doesn't have access to such variable named quit hence not defined . Assign the command at the quit button to point to app.destroy like so - command=app.destroy that supposed to work because you provide an instance of the ...The clue is in the error: NameError, on line 5 where you call pd.DataFrame, because there is no import statement, Python does not know what the "name" pd means. Share Improve this answerFirst of all, try creating a minimal reproducible example by isolating parts of your code until you isolate the exact lines/modules/packages creating the problem. The Stacktrace already helps, because now we know that it is a problem when calling the pydot.graph_from_dot_data method.Nov 23, 2019 · 1 Answer. In Python 3.x, use int instead of long. PEP 237: Essentially, long renamed to int. That is, there is only one built-in integral type, named int; but it behaves mostly like the old long type. The resulting error was this: NameError: name 'math' is not defined. This happened because the interpreter did not recognize the math keyword. Along with other math methods in Python, we must first import the math module to use it. Here's a fix: import math x = 5.5 print(math.ceil(x)) # 6.First of all, try creating a minimal reproducible example by isolating parts of your code until you isolate the exact lines/modules/packages creating the problem. The Stacktrace already helps, because now we know that it is a problem when calling the pydot.graph_from_dot_data method.0. You should insert a cell just before your present code cell and then type the following code. from sklearn.base import BaseEstimator, TransformerMixin. class DataFrameSelector (BaseEstimator, TransformerMixin): def __init__ (self, attribute_names): self.attribute_names = attribute_names def fit (self, X, y=None): return self def transform ...May 23, 2021 · NameError: Name 'Item' is not defined. 0. Using a function to create a dataframe from a webscrape. Hot Network Questions How in Bash to test a name/string is an ... How to fix NameError: name ‘Y’ is not defined? we use the input () function for user input but input is a string or text, not a code so in our case we need to convert the code Y in to string “Y” then we are able to fix this error, for more clarification please see the above example. For more information Visit Amol Blog Code YouTube Channel.# NameError: name 'X' is not defined in Python. The Python "NameError: name is not defined" occurs when we try to access a variable or a function that is not defined or before it is defined. To solve the error, make sure you haven't misspelled the variable's name and access it after it has been declared.Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teamsrunning it from an empty dir makes it go passed this issue. i.e. try the following. mkdir empty_dir && cd empty_dir && python -c 'import torch'. source: answer. Also, I just wan to put it out there that the root cause of this issue for me when importing torch was a broken numpy installation.Traceback (most recent call last): File line 4, in <module> print__age(14) NameError: name 'print__age' is not defined This issue is similar to the previous example but applied to function. Although there is a “print age” function, the function name is print, underscore, and age; however, I used double underscore __ when I called the function.May 23, 2021 · NameError: Name 'Item' is not defined. 0. Using a function to create a dataframe from a webscrape. Hot Network Questions How in Bash to test a name/string is an ... Jun 27, 2022 · addTWoNumbers() # NameError: name 'addTWoNumbers' is not defined In the code above, we called a function – addTWoNumbers() – that was yet to be defined in the program. To fix this, you can create the function if you need it or just get rid of the function if it is irrelevant. Jun 6, 2021 · Add a comment. 1. Chepner is correct. You have to call calculate_ticket_price in your init function. The proper syntax is using the super keyword. Example: class Customer (TicketMixin): """ Create instance of Customer """ def __init__ (self, name, age,): self.name = name self.age = age self.price = super ().calculate_ticket_price (self.age) def ... "NameError: name 'token' is not defined. I am writing a token generator, (like a password generator) and I made a function called buy_tokens(token). Even after the function, it does not read the parameter that is passed in the buy_token function. To understand better, read the code:You have imported the math module using a different name. How to fix the NameError: name 'math' is not defined? The math library in Python is a built-in module that provides various mathematical operations and functions. It includes functions for basic arithmetic operations, trigonometric functions, logarithmic functions, and more. Python NameError: name '' is not defined (though it sure seems like it is) Load 4 more related questions Show fewer related questions Sorted by: Reset to ...Jan 7, 2014 · Traceback (most recent call last): File "simple.py", line 4, in <module> class Simple (object): File "simple.py", line 9, in Simple for i in xrange (self.a): NameError: name 'self' is not defined. Python interprets the loop code in the execution scope of the class body. Whatever ends up in the namespace after executing the code in the class ... Jul 27, 2022 · NameError: name 'Your' is not defined Most beginners make these types of mistakes and sometimes find it hard to find a solution. One more thing that beginners make ... Feb 1, 2023 · The Python "NameError: name 'plt' is not defined" occurs when we use the pyplot module without importing it first. To solve the error, install matplotlib and import plt (import matplotlib.pyplot as plt) before using it. Open your terminal in your project's root directory and install the matplotlib module. shell. NameError: name 'db' is not defined. Ask Question Asked 3 years, 3 months ago. Modified 3 years, 3 months ago. Viewed 3k times 0 I've made a simple code using python ... Jun 13, 2017 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams line 37, in <module> for i in word: NameError: name 'word' is not defined. when I try to run this program. Here is the relevant code: def Pig_word0 (word): "" "This is a function which can make string translate to pig latin and first letter become capital." "" # Determined string include a, e, i, o, u or not Prefix = [] for i in word: if i in ...1 import logging as lg. 3 # log a warning message "Watch out!" ----> 4 logging.warning ('Watch out!') NameError: name 'logging' is not defined. We get a NameError: name 'logging' is not defined. This is because we have imported the logging module with the name lg but we’re trying to use it using the name logging.In Python 2.x input is basically doing eval (input ()). You can read up on eval here. Basically it tries to evaluate the given expression. Since numbers and strings are expressions themselves, it will try to run your h input as literally h instead of a str. Once again use raw_input () to avoid this in Python 2.x.You should use raw_input because you are using python-2.7. When you use input () on a variable (for example: s = input ('Name: ') ), it will execute the command ON the Python environment without saving what you wrote on the variable ( s) and create an error if what you wrote is not defined. Using this code in my website update tool, I receive a NameError: name 'new_link1' is not defined. However I use the name new_link in my code, not new_link1. I am using Jupyter notebooks with some other notebooks running similar code if that might be having an effect. My code is below.NameError: name is not defined. In python, nameerror name is not defined is raised when we try to use the variable or function name which is not valid. Example: value = ['Mango', 'Apple', 'Orange'] print(values) After writing the above code, Ones you will print “ values ” then the error will appear as a “ NameError: name ‘values’ is ...1. First thing first: always try to avoid using the global keyword. It causes instability i code as it gets longer and complex. Anyways, your code says global is not defined because you don't have the global variable named browser defined outside of the function scopes. Remove the global keyword.In Python 2.x input is basically doing eval (input ()). You can read up on eval here. Basically it tries to evaluate the given expression. Since numbers and strings are expressions themselves, it will try to run your h input as literally h instead of a str. Once again use raw_input () to avoid this in Python 2.x. try: # Python 2 forward compatibility range = xrange except NameError: pass # Python 2 code transformed from range (...) -> list (range (...)) and # xrange (...) -> range (...). The latter is preferable for codebases that want to aim to be Python 3 compatible only in the long run, it is easier to then just use Python 3 syntax whenever possible ...Let’s now look at the above scenarios in detail. The scipy module is not imported. It can happen that you are trying to use the scipy module without even importing it. This is because Python does not recognize the scipy library and its functions until it is imported into the code.When I type in number in Entry it says name (of Entry) is not defined. I'm very new at programing and this is an school project. In this project I'm trying to make value calculator. marka1=float (marka.get ())*1*3.79 NameError: name 'marka' is not defined. Code:Feb 2, 2023 · if i use 'print' in fist cell, i can see the data from 'data_df'. the problem is when i wolf like use in another cell into jupyterlab. – Carlos. Feb 2 at 21:16. 1. 'NameError: name 'data_df ' is not defined'. Note the extra space after data_df in that message. Maybe you put an extra space in the cell with the code that plots the graphics? A NameError is raised when you try to use a variable or a function name that is not valid. In Python, code runs from top to bottom. This means that you cannot declare a variable after you try to use it in your code.class GameLogic (object): def __init__ (self): self._player = Player (7) class Player (object): def __init__ (self,move_count): self.move_count = move_count. This is not my original code. I simplified my original code to show my mistake. Part of my original code is down below. class GameLogic: def __init__ (self, dungeon_name="game1.txt ...NameError: global name 'xrange' is not defined in Python 3. 370. Could not find a version that satisfies the requirement tensorflow. 185. NameError: global name ...A NameError is raised when you try to use a variable or a function name that is not valid. In Python, code runs from top to bottom. This means that you cannot declare a variable after you try to use it in your code.@Mark_Hanslip Glad you’re trying the native API! The full import paths are torch.cuda.amp.autocast and torch.cuda.amp.GradScaler.Often, for brevity, usage snippets don’t show full import paths, silently assuming the names were imported earlier and that you skimmed the class or function declaration/header to obtain each path.Aug 2, 2015 · 3 Answers. Sorted by: 1. The while loop currently will run forever because the case is always true, newTask == "y". In order to exit the loop newTask needs to be set to something other than "y" causing the case to become false, newTask = "n". On the other hand it appears that your program doesn't need to be within a newTask while loop at all ... NameError is a kind of error in Python that occurs when executing a function, variable, library, or string without quotes that have been typed in the code without any previous Declaration. When the interpreter, upon execution, cannot identify the global or local name throws a NameError.NameError: Name 'Item' is not defined. 0. Using a function to create a dataframe from a webscrape. Hot Network Questions How in Bash to test a name/string is an ...3 Answers. Because model has not been defined before using it in the line classes = model.predict (images, batch_size=10). First define a model and then use it, for eg; from sklearn.linear_model import LinearRegression x = 30 * np.random.random ( (20, 1)) y = 0.5 * x + 1.0 + np.random.normal (size=x.shape) model = LinearRegression () model.fit ...The clue is in the error: NameError, on line 5 where you call pd.DataFrame, because there is no import statement, Python does not know what the "name" pd means. Share Improve this answerNov 16, 2015 · So then you'd just want to do: try: a = input () control (a, x, y, z, k) That way, 'a' is initialized before you run the control function. You need to assign values not just to the variable a but also to other variables x, y, z, and k which you're passing here -> control (a, x, y, z, k) # for example: a= 'ADDITION' x= 1 y= 2 z=3 k=4 # and then ... Python NameError: name '' is not defined (though it sure seems like it is) Load 4 more related questions Show fewer related questions Sorted by: Reset to ...1. It has has to do with how you imported the json module. By using the * notation, you are importing everything in the json module. When importing a module in this way, you do not need to specify the module a function came from. When importing, you have two options, import the module (and reference the module name when using it), or import ...Our code returns [0, 1, 2], which is all the numbers in the range of 0 and 3 (exclusive of 3). The xrange() function returns a list of numbers.. Python 3 removed the xrange() function in favor of a new function called range().Jan 8, 2019 · 1. global bgcolor does not define, declare, or otherwise create a variable. It simply states that a global variable by that name, not a local variable, should be used. You still need to ensure it is defined before your first use in DISPLAYSURF.fill (bgcolor). Specifically, you need to assign a value to the variable before the first time you ... The Python "NameError: name 'plt' is not defined" occurs when we use the pyplot module without importing it first. To solve the error, install matplotlib and import plt (import matplotlib.pyplot as plt) before using it. Open your terminal in your project's root directory and install the matplotlib module. shell.However, you can remove the unicode () call altogether; open () produces a file object that already decodes data to Unicode for you. You probably want to tell it what codec to use, explicitly: fileMain = open ("dictionary_15k.txt", "r", encoding="utf-8") for line1 in fileMain: dictWords.append (line1.strip ()) You may want to switch to Python 2 ...However, you can remove the unicode () call altogether; open () produces a file object that already decodes data to Unicode for you. You probably want to tell it what codec to use, explicitly: fileMain = open ("dictionary_15k.txt", "r", encoding="utf-8") for line1 in fileMain: dictWords.append (line1.strip ()) You may want to switch to Python 2 ...Feb 23, 2023 · In practice, you could use any other name, e.g. this. However, this is not recommended as the convention is followed by most (if not all) Python developers and not following it would make your code more confusing and more difficult to read. # Conclusion. To solve the "NameError: name 'self' is not defined", make sure: In your case, instead of returning 'edit', it is trying to evaluate the variable name edit, which you have not defined. To solve this, make sure to run your script with Python 3: $ python3 my_script.py. Or, on the off chance that you actually want to use Python 2; raw_input () provides the same functionality as input () does in Python 3.Jul 27, 2022 · 今回はPythonのNameErrorについて解説します。 1. NameErrorとは 2. NameErrorの対応方法 3. まとめ 関連記事 1. NameErrorとは NameErrorはPythonの組み込み例外の1つで、「名前が見つからなかった」というエラーです。 このエラーは、変数や関数などを参照した… Jan 14, 2011 · I'd recommend putting a import pdb;pdb.set_trace () first in the InfraPy.py file to make sure you are in the right file, and step through the definition of InfraPy.py to see what is happening. If you don't get a breakpoint, you are importing another file than you think. You can also dir (InfraPy) after importing it, and check which file you are ... 1. It has has to do with how you imported the json module. By using the * notation, you are importing everything in the json module. When importing a module in this way, you do not need to specify the module a function came from. When importing, you have two options, import the module (and reference the module name when using it), or import ...Apr 2, 2021 · And also: "NameError: name 'price_buy' is not defined". The code is generating a list of random numbers. import numpy as np # This function generates a list of numbers under certain rules def num_var_list (): global number_list, number_exit, number_target number_list = [] number_target = number_exit num_max_robot = (number_target * 20) / 100 ... NameError: name ‘screen’ is not defined. Did you mean: ‘Screen’? 21st January 2023; ImportError: cannot import name ‘screen’ from ‘turtle’ 21st January 2023; ModuleNotFoundError: No module named ‘Turtle’ 21st January 2023; Python Quiz Code Sachin Vs Virat 2023 21st January 2023; NameError: name ‘Self’ is not defined.@Mark_Hanslip Glad you’re trying the native API! The full import paths are torch.cuda.amp.autocast and torch.cuda.amp.GradScaler.Often, for brevity, usage snippets don’t show full import paths, silently assuming the names were imported earlier and that you skimmed the class or function declaration/header to obtain each path.

NameError: name '_mysql' is not defined after setting change to mysql 3 Django connect mysql problem, NameError: name '_mysql' is not defined. Heavy r.ccom

nameerror name

Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsBPO 39513 Nosy @vsajip, @vstinner, @serhiy-storchaka, @tirkarthi Superseder bpo-26789: logging: Trying to log during Python finalization with NameError: name 'open' is not defined Note: these values reflect the state of the issue at the ...See full list on careerkarma.com 3 Answers. Because model has not been defined before using it in the line classes = model.predict (images, batch_size=10). First define a model and then use it, for eg; from sklearn.linear_model import LinearRegression x = 30 * np.random.random ( (20, 1)) y = 0.5 * x + 1.0 + np.random.normal (size=x.shape) model = LinearRegression () model.fit ...First of all, try creating a minimal reproducible example by isolating parts of your code until you isolate the exact lines/modules/packages creating the problem. The Stacktrace already helps, because now we know that it is a problem when calling the pydot.graph_from_dot_data method."NameError: name 'token' is not defined. I am writing a token generator, (like a password generator) and I made a function called buy_tokens(token). Even after the function, it does not read the parameter that is passed in the buy_token function. To understand better, read the code:Aug 1, 2022 · Using this code in my website update tool, I receive a NameError: name 'new_link1' is not defined. However I use the name new_link in my code, not new_link1. I am using Jupyter notebooks with some other notebooks running similar code if that might be having an effect. My code is below. Aug 1, 2022 · Using this code in my website update tool, I receive a NameError: name 'new_link1' is not defined. However I use the name new_link in my code, not new_link1. I am using Jupyter notebooks with some other notebooks running similar code if that might be having an effect. My code is below. Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams1 import logging as lg. 3 # log a warning message "Watch out!" ----> 4 logging.warning ('Watch out!') NameError: name 'logging' is not defined. We get a NameError: name 'logging' is not defined. This is because we have imported the logging module with the name lg but we’re trying to use it using the name logging.The resulting error was this: NameError: name 'math' is not defined. This happened because the interpreter did not recognize the math keyword. Along with other math methods in Python, we must first import the math module to use it. Here's a fix: import math x = 5.5 print(math.ceil(x)) # 6.Feb 23, 2023 · In practice, you could use any other name, e.g. this. However, this is not recommended as the convention is followed by most (if not all) Python developers and not following it would make your code more confusing and more difficult to read. # Conclusion. To solve the "NameError: name 'self' is not defined", make sure: NameError is a kind of error in Python that occurs when executing a function, variable, library, or string without quotes that have been typed in the code without any previous Declaration. When the interpreter, upon execution, cannot identify the global or local name throws a NameError.1. It has has to do with how you imported the json module. By using the * notation, you are importing everything in the json module. When importing a module in this way, you do not need to specify the module a function came from. When importing, you have two options, import the module (and reference the module name when using it), or import ...In Python 2.x input is basically doing eval (input ()). You can read up on eval here. Basically it tries to evaluate the given expression. Since numbers and strings are expressions themselves, it will try to run your h input as literally h instead of a str. Once again use raw_input () to avoid this in Python 2.x. The Python interpreter throws the NameError exception if it encounters an undefined variable or function name. To fix it, you must figure out why the variable is not defined—the most frequent bugs are (1) to use the variable or function name in the code before it was defined, or (2) to misspell the name in either the definition or the usage..

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