logical error in python

April 7, 2024 - A logical error, commonly referred to as a “bug”, is one that occurs in Python programming when a code runs without crashing, but produces incorrect or unexpected results.

GeeksforGeeks

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Errors and Exceptions in Python - GeeksforGeeks

May 29, 2026 - Example: Here, the code gives an IndentationError because the statement inside the if block is not indented properly. ... Logical errors are mistakes in the program logic that cause incorrect output even though the code runs successfully.

Discussions

Determining syntax or logical error

Go look up Microsoft Visual Studio Code (free). You will need to install plugins for Python (kind of like how you get plugins for your browser, there's a plug-in manager built into the application) but once you do it will do exactly this. Your editor will automatically tell you when you make a syntax error as you type it will evaluate your code, it will let you pause its execution and step through your code as it runs line by line. A good one integrated development environment (IDE, which is what VS Code is) is an essential tool for writing code. More on reddit.com

r/CodingHelp

August 30, 2023

List/Function Logic Error

Your output doesn't make any sense in the first place, because as-is this should give an error; list objects aren't callable. def function(my_list, index): for index in my_list: return my_list(index) # <- You'd need square brackets print(function([1, 2, 3, 4], 2)) However, in that case I don't understand why the loop is there in the first place. It's also the reason for the output you're getting, because it overwrites index and the first element is always 1, so my_list[index] == 2. More on reddit.com

r/learnpython

April 1, 2024

Help Request: Logic Error in defined functions.

I am not getting any printed output from the step() function I defined. My program did not end

You are getting a lot of "negative vibes" because we see errors in your function that will crash it. Yet you are saying the code did not crash. So we suspect that you haven't posted the actual code you are running.

Just talking about your step() function. This bit of simplified code shows your problem. Leave the # line as-is and run it.

btls = 3000

def step():
#    global btls   # after first execution remove the #
    btls -= 1
    
print(f"before: {btls=}")
step()
print(f" after: {btls=}")

With the global commented out, this prints:

before: btls=3000
Traceback (most recent call last):
  File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 31, in <module>
    start(fakepyfile,mainpyfile)
  File "/data/user/0/ru.iiec.pydroid3/files/accomp_files/iiec_run/iiec_run.py", line 30, in start
    exec(open(mainpyfile).read(),  __main__.__dict__)
  File "<string>", line 8, in <module>
  File "<string>", line 5, in step
UnboundLocalError: cannot access local variable 'btls' where it is not associated with a value

So your code will definitely stop when you call the step() function. And when you call the pickUpBottle() function, and the putDownBottles() function. All for the same reason: if you assign to a name inside a function that name is considered local to the function unless the name is made global in the function. Now delete the # character from the sample global line and run it again. Now it's doing what you want.

In addition, you haven't formatted your code correctly, which means we can't run it. The moveBottlesOverWeightLimit() function has an indentation problem. When quoting code here you should be copy/pasting code into reddit. Fixing it up by hand is a waste of time.

People also ask

What is the most common error in Python?

For beginners, SyntaxError and IndentationError are the most frequent, since both come from formatting rather than logic. Among runtime exceptions, TypeError, NameError, and KeyError are the ones you meet most often in day-to-day code.

last9.io

last9.io › blog › types-of-errors-in-python

Types of Errors in Python: Syntax, Runtime, and Logical Explained ...

How many types of errors are there in Python?

Three: syntax errors, runtime errors, and logical errors. Every named exception, such as TypeError or KeyError, is a specific case that belongs to one of these three categories rather than a fourth type of its own.

last9.io

last9.io › blog › types-of-errors-in-python

Types of Errors in Python: Syntax, Runtime, and Logical Explained ...

What is the difference between an error and an exception in Python?

An exception is the object Python raises when something goes wrong at runtime, and your code can catch it with try and except. "Error" is the broader word, and it also covers syntax errors, which cannot be caught this way because the file never runs. In practice most runtime errors are exceptions, which is why the two terms are often used interchangeably.

last9.io

last9.io › blog › types-of-errors-in-python

Types of Errors in Python: Syntax, Runtime, and Logical Explained ...

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