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Plot a bar using matplotlib using a dictionary
... penultimate line should read plt.xticks(range(len(D)), list(D.keys())) in python3, because D.keys() returns a generator, which matplotlib cannot use directly.
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Python - List of unique dictionaries
... 34, 'id': 1, 'name': 'john'}, {'age': 30, 'id': 2, 'name': 'hanna'}]
In Python3
>>> L=[
... {'id':1,'name':'john', 'age':34},
... {'id':1,'name':'john', 'age':34},
... {'id':2,'name':'hanna', 'age':30},
... ]
>>> list({v['id']:v for v in L}.values())
[{'age': 34, 'id': 1, 'nam...
How to install packages offline?
...on 3. you can create python 3 virtualenv with this command.
virtualenv -p python3 envname
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Sending HTML email using Python
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for python3, improve @taltman 's answer:
use email.message.EmailMessage instead of email.message.Message to construct email.
use email.set_content func, assign subtype='html' argument. instead of low level func set_payload and ...
Counting the Number of keywords in a dictionary in python
...Some modifications were made on posted answer UnderWaterKremlin to make it python3 proof. A surprising result below as answer.
System specs:
python =3.7.4,
conda = 4.8.0
3.6Ghz, 8 core, 16gb.
import timeit
d = {x: x**2 for x in range(1000)}
#print (d)
print (len(d))
# 1000
print (len(d.keys()...
How to convert list of tuples to multiple lists?
...ppend is 3x - 4x faster than zip! The test script is here:
#!/usr/bin/env python3
import time
N = 2000000
xs = list(range(1, N))
ys = list(range(N+1, N*2))
zs = list(zip(xs, ys))
t1 = time.time()
xs_, ys_ = zip(*zs)
print(len(xs_), len(ys_))
t2 = time.time()
xs_, ys_ = [], []
for x, y in zs:
...
multiprocessing: How do I share a dict among multiple processes?
... that can be converted to dict
pprint.pprint(dict(d))
Output:
$ python3 mul.py
{22562: 'Hi, I was written by process 22562',
22563: 'Hi, I was written by process 22563',
22564: 'Hi, I was written by process 22564',
22565: 'Hi, I was written by process 22565',
22566: 'Hi, I was writte...
Python Sets vs Lists
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@RyneWang this is true, but only for Python3. In Python2 range returns a normal list (that's why exists horrible things like xrange)
– Manoel Vilela
Dec 11 '18 at 17:55
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Getting the name of a variable as a string
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On python3, this function will get the outer most name in the stack:
import inspect
def retrieve_name(var):
"""
Gets the name of var. Does it from the out most frame inner-wards.
:param var: variable t...
Find the most common element in a list
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This breaks on Python3 if your list has different types.
– AlexLordThorsen
Feb 24 '16 at 22:47
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