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How can I open multiple files using “with open” in Python?
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As of Python 2.7 (or 3.1 respectively) you can write
with open('a', 'w') as a, open('b', 'w') as b:
do_something()
In earlier versions of Python, you can sometimes use
contextlib.nested() to nest context managers. This won't work...
Add text to Existing PDF using Python
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Example for [Python 2.7]:
from pyPdf import PdfFileWriter, PdfFileReader
import StringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
packet = StringIO.StringIO()
# create a new PDF with Reportlab
can = canvas...
Pickle or json?
...cfa959a70/pickle_vs_json.py
python pickle_vs_json.py
Results with python 2.7 on a decent 2015 Xeon processor:
Dir Entries Method Time Length
dump 10 JSON 0.017 1484510
load 10 JSON 0.375 -
dump 10 Pickle 0.011 1428790
load 10 Pickle 0.098 -
dump 20 JSON ...
Can a variable number of arguments be passed to a function?
... Not sure how you got myfunc(abc=123, def=456) to work, but in mine (2.7), 'def' can't be passed in this function without getting a SyntaxError. I assume this is because def has meaning in python. Try myfunc(abc=123,fgh=567) instead. (Otherwise, great answer and thanks for it!)
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How can I check if an ip is in a network in Python?
... I think your solution has a serious bug: addressInNetwork('172.7.1.1', '172.3.0.0/16') -> True (I converted 'L' to '<L' in my 64bit os)
– Taha Jahangir
Feb 10 '12 at 5:01
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How can I use a C++ library from node.js?
...compile issues with node-ffi. It's a major PITA! Is it dependent on Python 2.7 or is that just the build process? There must be a LoadLibrary mechanism in NodeJS for a standard Win32 DLL?
– tgraupmann
Oct 30 '19 at 20:48
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How to read/process command line arguments?
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This is now part of standard Python as of 2.7 and 3.2 :)
– jpswain
Sep 3 '10 at 2:08
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Is it acceptable and safe to run pip install under sudo?
... your case you want to do something like :
chown -R $USER /Library/Python/2.7/site-packages/
or more generally
chown -R $USER <path to your global pip packages>
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VC DDE（Dynamic Data Exchange）与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，并且现有的WINDOWS下现实界面都不能很好的实时显示。我在网上查了一下，发现WINDOWS DDE功能可能实现项目这个需求。
DDE，中文名叫动态数据交换，是基于WINDOWS系统开发的一种消息传输的通信方案。花了半天时间研究了下，做...
Rails 4: how to use $(document).ready() with turbo-links
...:load" doesn't work on your pre-Rails 5 app. See guides.rubyonrails.org/v4.2.7/…
– Eliot Sykes
Aug 7 '16 at 12:45
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