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How can I filter lines on load in Pandas read_csv function?
...
If you are on linux you can use grep.
# to import either on Python2 or Python3
import pandas as pd
from time import time # not needed just for timing
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
def zgrep_data(f, string):
'''grep multiple items f i...
Random string generation with upper case letters and digits
...ion, I bet that mistake has been made many times already.
If you're using python3.6 or above, you can use the new secrets module as mentioned in MSeifert's answer:
''.join(secrets.choice(string.ascii_uppercase + string.digits) for _ in range(N))
The module docs also discuss convenient ways to ge...
What is the result of % in Python?
... // 2
4
>>> 9 % 2
1
In modern Python 9 / 2 results 4.5 indeed:
$ python3.6
Python 3.6.1 (default, Apr 27 2017, 00:15:59)
[GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 9 / 2
4.5
>>...
Getting key with maximum value in dictionary?
...> max(stats.iteritems(), key=operator.itemgetter(1))[0]
'b'
If using Python3:
>>> max(stats.items(), key=operator.itemgetter(1))[0]
'b'
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Get Image size WITHOUT loading image into memory
...' codec can't decode byte 0x89 in position 0: invalid start byte on MacOS, python3 on data = input.read(25) , file on image gives PNG image data, 720 x 857, 8-bit/color RGB, non-interlaced
– mrgloom
Nov 21 '18 at 11:24
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Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...们也由一个 crackme 说开去。本文的例子程序你可以到这来下载:
http://www.crackmes.de/users/veneta/crackmes/linux_crackme_v2 。古人云“工欲善其事，必先利其器”，本文中所用到的工具及操作平台罗列如下:
操作平台: gentoo 2004.3 # kernel 2.6...
Combining Multiple Commits Into One Prior To Push
...ess the git-rebase-todo file.
The tool using python below:
#!/usr/bin/env python3
#encoding: UTF-8
import os
import sys
def change_editor(current_file):
os.system("git config --local --replace-all core.editor " + current_file) # Set current_file as git editor
os.system("git rebase -i") #...
How to check if all elements of a list matches a condition?
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Note for python3; filter() returns an iterable, not a list. Thus the line would be listb = list(filter(lamba x: x[2] != 0, listb))
– Meg Anderson
Aug 10 at 18:10
...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Paint的实例化操作不要写在onDraw()方法中等）；
对于并发下载等类似逻辑的实现尽量避免多次创建线程对象，而是交给线程池处理。
当然了，有了上面说明GC导致的性能后我们就该定位分析问题了，可以通过运行DDMS->Allocation T...
Automatically add newline at end of curl response body
... this script can generate a ~/.curlrc file with colours.
#!/usr/bin/env python3
from pathlib import Path
import click
chunks = [
('status=', 'blue'),
('%{http_code} ', 'green'),
('%{redirect_url} ', 'green'),
('size=', 'blue'),
('%{size_download} ', 'green'),
('time=', 'bl...