Linked Questions
46 questions linked to/from Is it a good practice to use try-except-else in Python?
1
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NameError: name 'variable_name" is not defined when i try to catch an execption [duplicate]
Hello I am trying to create a program that reads two txt.files and displays them for the user on the console.
I want to write an exception for the case that atleast one of the files is not in the same ...
-3
votes
1
answer
48
views
What is the use of try and except inside a function in python? [duplicate]
I want to know how to use try and except inside a function and what change will it bring to my syntax of code.
I was trying to use this tags inside one function but error was coming and my program was ...
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votes
0
answers
27
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What is the best practice with regards to type consistency for returning a result, error, or warning in Python? [duplicate]
This might be answered elsewhere, but I had trouble finding a good "Googlable" phrasing to this question. I have a Python program I'm writing where the lead has requested that all exits from ...
- 1,873
3313
votes
11
answers
3.3m
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Manually raising (throwing) an exception in Python
How do I raise an exception in Python so that it can later be caught via an except block?
- 274k
241
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7
answers
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When is .then(success, fail) considered an antipattern for promises?
I had a look at the bluebird promise FAQ, in which it mentions that .then(success, fail) is an antipattern. I don't quite understand its explanation as for the try and catch.
What's wrong with the ...
- 4,749
132
votes
6
answers
562k
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re.sub erroring with "Expected string or bytes-like object"
I have read multiple posts regarding this error, but I still can't figure it out. When I try to loop through my function:
def fix_Plan(location):
letters_only = re.sub("[^a-zA-Z]", # ...
- 1,343
71
votes
9
answers
64k
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What's the best way to handle Django's objects.get?
Whenever I do this:
thepost = Content.objects.get(name="test")
It always throws an error when nothing is found.
How do I handle it?
- 274k
36
votes
15
answers
10k
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Are exceptions really for exceptional errors? [closed]
It's my understanding that common wisdom says to only use exceptions for truly exceptional conditions (In fact, I've seen that statement here at SO several times).
However, Krzysztof Cwalina says:
...
- 29.8k
8
votes
2
answers
35k
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Python OpenCV Error: "TypeError: Image data cannot be converted to float"
So I am trying to create a Python Program to detect similar details in two images using Python's OpenCV. I have the two images and they are in my current directory, and they exist (see the code in ...
user8975033
9
votes
3
answers
23k
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Check if key exists and get the value at the same time in Python?
Sometimes we may need to verify the existence of a key in a dictionary and make something if the corresponding value exists.
Usually, I proceed in this way:
if key in my_dict:
value = my_dict[...
- 19.9k
9
votes
5
answers
8k
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Other options instead of using try-except
When line 2 in the text file has 'nope' then it will ignore the line and continue the next one. Is there another way to write this without using try and except? Can I use if else statement to do this?
...
- 372
17
votes
2
answers
8k
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Why does handling multiple exceptions require a tuple, but not a list?
Consider the following example:
def main_list(error_type):
try:
if error_type == 'runtime':
raise RuntimeError("list error")
if error_type == 'valueerror':
...
- 14.2k
3
votes
3
answers
2k
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try catch or type conversion performance in julia - (Julia 73 seconds, Python 0.5 seconds)
I have been playing with Julia because it seems syntactically similar to python (which I like) but claims to be faster. However, I tried making a similar script to something I have in python for ...
- 3,782
2
votes
3
answers
6k
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How to multiply big numbers faster?
I was experimenting with multiplying large numbers in python. For my purpose I was trying to evaluate.
2*odd*(4*odd^2 + 7)/3 - 6*odd^2 - 3
Now my question boils down to how to multiply numbers ...
- 471
1
vote
4
answers
4k
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Variable assignment from unknown length list in Python
I'm scraping a website in order to store data in a database that has 3 columns. The part of the webstsite i'm scraping looks like one of either of the three examples below
# Example 1:
<div>
&...
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