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Numpy: find first index of value fast
...ate(vec):; if v == item: return i. (This is not a good idea in Python <=2.7, where enumerate creates a list rather than a basic iterator.)
– acdr
Jan 23 at 16:20
add a comm...
Printing Lists as Tabular Data
...
Some ad-hoc code for Python 2.7:
row_format ="{:>15}" * (len(teams_list) + 1)
print(row_format.format("", *teams_list))
for team, row in zip(teams_list, data):
print(row_format.format(team, *row))
This relies on str.format() and the Format Spe...
How are POST and GET variables handled in Python?
...uteError: 'NoneType' object has no attribute 'split' using CGI with Python 2.7
– candlejack
Jul 17 '16 at 20:02
1
...
How to step through Python code to help debug issues?
...ersions of modules and to experiment it more iteratively.
$ python
Python 2.7 (r27:82508, Jul 3 2010, 21:12:11)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pdb_script
>>> import pdb
>>> p...
Check if all elements in a list are identical
...r to adapt comparison from a == b to a is b.
timeit result, for Python 2.7 and (only s1, s4, s7, s9 should return True)
s1 = [1] * 5000
s2 = [1] * 4999 + [2]
s3 = [2] + [1]*4999
s4 = [set([9])] * 5000
s5 = [set([9])] * 4999 + [set([10])]
s6 = [set([10])] + [set([9])] * 4999
s7 = [1,1]
s8 = [1,2...
Total memory used by Python process?
...id())
print(process.memory_info().rss) # in bytes
On my current Python 2.7 install with psutil 5.6.3, the last line should be
print(process.memory_info()[0])
instead (there was a change in the API).
Note: do pip install psutil if it is not installed yet.
...
What is the fastest way to check if a class has a function defined?
I'm writing an AI state space search algorithm, and I have a generic class which can be used to quickly implement a search algorithm. A subclass would define the necessary operations, and the algorithm does the rest.
...
Setting the correct encoding when piping stdout in Python
...he problem just exist when piping to stdout .
I tested in Fedora 25 Python 2.7.13
python --version
Python 2.7.13
cat b.py
#!/usr/bin/env python
#-*- coding: utf-8 -*-
import sys
print sys.stdout.encoding
running ./b.py
UTF-8
running ./b.py | less
None
...
Rename an environment with virtualenvwrapper
...
if you do:
$ ack-grep -ai doors ~/.virtualenvs/django/bin
you'll notice that will have doors as location and not django, you'll to change each file with the new location.
solution:
after renamed the folder execute the command below.
$ sed -i "...
Programmatically change log level in Log4j2
...
In log4j 2.7 LoggerContext hasn't a getConfiguration() method, see logging.apache.org/log4j/2.x/log4j-api/apidocs/index.html?org/…
– maxxyme
Nov 23 '16 at 13:53
...