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How can you automatically remove trailing whitespace in vim
...s\+$//e
call cursor(l, c)
endfun
autocmd FileType c,cpp,java,php,ruby,python autocmd BufWritePre <buffer> :call <SID>StripTrailingWhitespaces()
If you want to apply this on save to any file, leave out the second autocmd and use a wildcard *:
autocmd BufWritePre * :call <SID>...
Is there a way for multiple processes to share a listening socket?
...ost others have provided the technical reasons why this works. Here's some python code you can run to demonstrate this for yourself:
import socket
import os
def main():
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind(("127.0.0.1", 8888))
serversocket....
How to find all occurrences of a substring?
Python has string.find() and string.rfind() to get the index of a substring in a string.
20 Answers
...
Convert tuple to list and back
... NumPy is the fundamental package for scientific computing with Python. NumPy's main object is the homogeneous multidimensional array. It is a table of elements (usually numbers), all of the same type, indexed by a tuple of positive integers.
– pradyunsg
...
Format numbers in django templates
...d work.
Refer to documentation.
update at 2018-04-16:
There is also a python way to do this thing:
>>> '{:,}'.format(1000000)
'1,000,000'
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How to convert a Django QuerySet to a list
...
def querySet_to_list(qs):
"""
this will return python list<dict>
"""
return [dict(q) for q in qs]
def get_answer_by_something(request):
ss = Answer.objects.filter(something).values()
querySet_to_list(ss) # python list return.(json-able)
this code ...
What scalability problems have you encountered using a NoSQL data store? [closed]
...obably the biggest German Linux community website). The site is written in Python and we've added a WSGI middleware which was able to catch all exceptions and send them to another small MySQL powered website. This small website used a hash to determine different bugs and stored the number of occurre...
Output data from all columns in a dataframe in pandas [duplicate]
I have a csv file with the name params.csv . I opened up ipython qtconsole and created a pandas dataframe using:
7 Ans...
What's the difference between globals(), locals(), and vars()?
... variables are copied into locals() again.
Two notes:
This behavior is CPython specific -- other Pythons may allow the updates to make it back to the local namespace automatically.
In CPython 2.x it is possible to make this work by putting an exec "pass" line in the function. This switches the fu...
创业 比“直男癌”更可怕的是“技术癌” - 资讯 - 清泛网 - 专注C/C++及内核技术
...垒。例如，我们AA投资上半年投资的玩美自由行，它以大数据技术和强大的分析算法为支撑，可以让用户在一分钟之内，通过简单的四步定制出性化的出境自由行，是一个极富竞争力的创业项目。更重要的是，玩美自由行项目最...