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How can I count the occurrences of a list item?
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Use Counter if you are using Python 2.7 or 3.x and you want the number of occurrences for each element:
>>> from collections import Counter
>>> z = ['blue', 'red', 'blue', 'yellow', 'blue', 'red']
>>> Counter(z)
Counter({'blue': 3, 'r...
90后创业四年:曾经觉得不公 后来愿赌服输 - 资讯 - 清泛网 - 专注C/C++及内核技术
...学二年级，就尝到了一夜成名的滋味。那年国庆节过后，我在人人网上开发了一个小应用叫“好友拼图”。这个应用能把你所有好友的头像拼成一张海报的模样，从远处看是你的头像，从近处看全是好友的小头像。我突发奇想，...
TortoiseGit save user authentication / credentials
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If you are a windows 10 + TortoiseGit 2.7 user:
for the first time login, simply follow the prompts to enter your credentials and save password.
If you ever need to update your credentials, don't waste your time at the TortoiseGit settings. Instead, windows sea...
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in rang
... help, after googling around i figured the following and it helped.
python 2.7 is in use.
# encoding=utf8
import sys
reload(sys)
sys.setdefaultencoding('utf8')
share
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improve this answer
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pip installing in global site-packages instead of virtualenv
...n my Mavericks Mac caused the Python package to be installed in the Python 2.7 global site packages directory. This was despite the fact that my $PATH started with the directory containing pip. Weird. This doesn't happen on CentOS. For me, the solution was calling pip3 instead of pip. When I had...
Python multiprocessing pool.map for multiple arguments
...with a fixed second argument, you can also use partial, but only in Python 2.7+.
import multiprocessing
from functools import partial
from contextlib import contextmanager
@contextmanager
def poolcontext(*args, **kwargs):
pool = multiprocessing.Pool(*args, **kwargs)
yield pool
pool.ter...
Extracting text from HTML file using Python
... This seems to be the most straightforward way of doing this in Python (2.7) using only the default modules. Which is really silly, as this is such a commonly needed thing and there's no good reason why there isn't a parser for this in the default HTMLParser module.
– Ingmar...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...Z全面的数据及数据解析）
下载链接：
http://www.viewtool.com/index.php/22-2016-07-29-02-11-32/205-hollong-4-0-4-1-ble
4. MTU 请求（REQEUST）
完整数据（以下关注蓝色标注部分）
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Unittest setUp/tearDown for several tests
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As of 2.7 (per the documentation) you get setUpClass and tearDownClass which execute before and after the tests in a given class are run, respectively. Alternatively, if you have a group of them in one file, you can use setUpModul...
Specify format for input arguments argparse python
...913 25.3754 13.913C26.5612 13.913 27.4607 13.4902 28.1109 12.6616C28.1109 12.7229 28.1161 12.7799 28.121 12.8346C28.1256 12.8854 28.1301 12.9342 28.1301 12.983C28.1301 14.4373 27.2502 15.2321 25.777 15.2321C24.8349 15.2321 24.1352 14.9821 23.5661 14.7787C23.176 14.6393 22.8472 14.5218 22.5437 14.521...