756 Answered Questions for the topic Python

Python String

04/07/19

Is there a way to substring a string?
Is there a way to substring a string in Python, to get a new string from the 3rd character to the end of the string?Maybe like `myString[2:end]`?If leaving the second part means 'till the end', if... more
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Python List Random

04/07/19

How to randomly select an item from a list?
Assume I have the following list: foo = ['a', 'b', 'c', 'd', 'e']What is the simplest way to retrieve an item at random from this list?
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Python Attributes

04/07/19

How to know if an object has an attribute in Python?
Is there a way in Python to determine if an object has some attribute? For example: >>> a = SomeClass() >>> a.someProperty = value >>> a.property Traceback... more
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04/07/19

Python simple if or logic statement?
How would you write, in python: if key < 1 or key > 34: I've tried every way I can think of, and am finding it very frustrating.
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Python List Count

04/07/19

How can I count the occurrences of a list item?
Given an item, how can I count its occurrences in a list in Python?
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Python Kwargs

04/07/19

What is the purpose and use of **kwargs?
What are the uses for `**kwargs` in Python? I know you can do an `objects.filter` on a table and pass in a `**kwargs` argument. Can I also do this for specifying time deltas i.e.... more
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Python Logic

04/07/19

Reason for "all" and "any" result on empty lists?
In Python, the built-in functions [`all`](http://docs.python.org/library/functions.html#all) and [`any`](http://docs.python.org/library/functions.html#any) return `True` and `False` respectively... more
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Python Dictionary Unset

04/05/19

How to remove a key from a Python dictionary?
When trying to delete a key from a dictionary, I write: if 'key' in myDict: del myDict['key']Is there a one line way of doing this?
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04/04/19

NetBeans aficionados looking for a Python IDE?
I used to develop Java or HTML/PHP project on NetBeans. I appreciate a number of its functionality like : - Fast code libraries browsing - Code refactoring - Auto-completion - Highlight syntax... more
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04/04/19

How to read a file line-by-line into a list?
How do I read every line of a file in Python and store each line as an element in a list? I want to read the file line by line and append each line to the end of the list.
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Python String

04/04/19

What is the most Pythonic way to pad a numeric string with zeroes to the left, i.e., so the numeric string has a specific length?
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Python

04/03/19

Converting integer to string in Python?
I want to convert an integer to a string in Python. I am typecasting it in vain: d = 15 d.str()When I try to convert it to string, it's showing an error like `int` doesn't have any attribute... more
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Python Null

04/03/19

null object in Python?
How do I refer to the null object in Python?
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04/03/19

Convert bytes to a string?
I'm using this code to get standard output from an external program: >>> from subprocess import * >>> command_stdout = Popen(['ls', '-l'], stdout=PIPE).communicate()[0]The... more
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04/03/19

How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this: try: myVar except NameError: # Do something.Are there other ways without exceptions?
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04/02/19

How to determine a Python variable's type?
How do I see the type of a variable whether it is unsigned 32 bit, signed 16 bit, etc.?How do I view it?
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Python Module Pip

04/01/19

How can I get a list of locally installed Python modules?
I would like to get a list of Python modules, which are in my Python installation (UNIX server).How can you get a list of Python modules installed in your computer?
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04/01/19

How do I trim whitespace?
Is there a Python function that will trim whitespace (spaces and tabs) from a string?Example: `\  example string\ ` → `example string`
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Python Iterable

04/01/19

In Python, how do I determine if an object is iterable?
Is there a method like `isiterable`? The only solution I have found so far is to call hasattr(myObj, '__iter__')But I am not sure how fool-proof this is.
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Python Integer Random

04/01/19

How can I generate random integers between 0 and 9 (inclusive) in Python?For example, `0`, `1`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`
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Python

03/31/19

Is there a simple way to determine if a variable is a list, dictionary, or something else? I am getting an object back that may be either type and I need to be able to tell the difference.
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Python List

03/30/19

Finding the index of an item given a list containing it in Python?
For a list `["foo", "bar", "baz"]` and an item in the list `"bar"`, how do I get its index (1) in Python?
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Python Class Oop Self

03/29/19

What is the purpose of self?
What is the purpose of the `self` word in Python? I understand it refers to the specific object created from that class, but I can't see why it explicitly needs to be added to every function as a... more
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03/29/19

How to use threading in Python?
I am trying to understand threading in Python. I've looked at the documentation and examples, but quite frankly, many examples are overly sophisticated and I'm having trouble understanding them.How... more
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03/27/19

Importing files from different folder?
I have the following folder structure.`application/app/folder/file.py`and I want to import some functions from ***file.py*** in another Python file which resides... more
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