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What is the difference between `sorted(list)` vs `list.sort()`?
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In general, when a python function returns None, it is a sign, that the operations are done in place, that's why, when you want to print list.sort() it returns None.
– user1767754
Nov 19 '17 at 9:34
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How exactly does a generator comprehension work?
...ne question here. I used next(gen_name) to get the result and it worked in Python 3. Is there any specific scenario where we need to use __next__()?
– Ankit Vashistha
May 30 '18 at 6:12
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Is there any difference between “foo is None” and “foo == None”?
... a special builtin method that determines how == is handled when used on a Python object. Here we have overridden it so that when == is used on objects of type Foo it always returns true. There isn't an equivalent method for the is operator and so the behaviour of is cannot be changed in the same wa...
Find which version of package is installed with pip
...w Jinja2
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Name: Jinja2
Version: 2.7.3
Location: /path/to/virtualenv/lib/python2.7/site-packages
Requires: markupsafe
In older versions, pip freeze and grep should do the job nicely.
$ pip freeze | grep Jinja2
Jinja2==2.7.3
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How to perform a mysqldump without a password prompt?
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$ mysqldump -u root mysql | head
-- MySQL dump 10.13 Distrib 5.6.23, for Linux (x86_64)
--
-- Host: localhost Database: mysql
-- ------------------------------------------------------
-- Server version 5.6.23
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_...
How do I activate a virtualenv inside PyCharm's terminal?
... has nothing to do with the OP's question. The problem is terminal not the Python interpreter. The venv integration has been there way before PyCharm 4. Your answer works though.
– Sam R.
Aug 3 '15 at 17:46
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What is the difference between gmake and make?
...U make. 'make' refers to the system's default make implementation; on most Linux distros this is GNU make, but on other unixes, it could refer to some other implementation of make, such as BSD make, or the make implementations of various commercial unixes.
The language accepted by GNU make is a sup...
IntelliJ shortcut to show a popup of methods in a class that can be searched
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On linux distributions (@least on Debian with plasma) the default shortcut is
Ctrl + 0
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How can I count the occurrences of a list item?
Given an item, how can I count its occurrences in a list in Python?
25 Answers
25
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Update value of a nested dictionary of varying depth
...t somewhat peculiar coding and at least one bug. I'd recommend, instead:
Python 2:
import collections
def update(d, u):
for k, v in u.iteritems():
if isinstance(v, collections.Mapping):
d[k] = update(d.get(k, {}), v)
else:
d[k] = v
return d
Pytho...